Use modules in common utils

13 files changed, 472 insertions, 460 deletions

diff --git a/app/assets/javascripts/awards_handler.js b/app/assets/javascripts/awards_handler.js
index 22fa1f2a609..ec5be8664b2 100644
--- a/app/assets/javascripts/awards_handler.js
+++ b/app/assets/javascripts/awards_handler.js
@@ -2,6 +2,7 @@
 /* global Flash */
 import _ from 'underscore';
 import Cookies from 'js-cookie';
+import { isInIssuePage, updateTooltipTitle } from './lib/utils/common_utils';
 
 const animationEndEventString = 'animationend webkitAnimationEnd MSAnimationEnd oAnimationEnd';
 const transitionEndEventString = 'transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd';
@@ -237,7 +238,7 @@ class AwardsHandler {
   addAward(votesBlock, awardUrl, emoji, checkMutuality, callback) {
     const isMainAwardsBlock = votesBlock.closest('.js-issue-note-awards').length;
 
-    if (gl.utils.isInIssuePage() && !isMainAwardsBlock) {
+    if (isInIssuePage() && !isMainAwardsBlock) {
       const id = votesBlock.attr('id').replace('note_', '');
 
       $('.emoji-menu').removeClass('is-visible');
@@ -288,7 +289,7 @@ class AwardsHandler {
   }
 
   getVotesBlock() {
-    if (gl.utils.isInIssuePage()) {
+    if (isInIssuePage()) {
       const $el = $('.js-add-award.is-active').closest('.note.timeline-entry');
 
       if ($el.length) {
@@ -452,11 +453,11 @@ class AwardsHandler {
   userAuthored($emojiButton) {
     const oldTitle = this.getAwardTooltip($emojiButton);
     const newTitle = 'You cannot vote on your own issue, MR and note';
-    gl.utils.updateTooltipTitle($emojiButton, newTitle).tooltip('show');
+    updateTooltipTitle($emojiButton, newTitle).tooltip('show');
     // Restore tooltip back to award list
     return setTimeout(() => {
       $emojiButton.tooltip('hide');
-      gl.utils.updateTooltipTitle($emojiButton, oldTitle);
+      updateTooltipTitle($emojiButton, oldTitle);
     }, 2800);
   }
 
diff --git a/app/assets/javascripts/behaviors/quick_submit.js b/app/assets/javascripts/behaviors/quick_submit.js
index 79702c54852..2cf8f4fa935 100644
--- a/app/assets/javascripts/behaviors/quick_submit.js
+++ b/app/assets/javascripts/behaviors/quick_submit.js
@@ -1,4 +1,5 @@
 import '../commons/bootstrap';
+import { isInIssuePage } from '../lib/utils/common_utils';
 
 // Quick Submit behavior
 //
@@ -45,7 +46,7 @@ $(document).on('keydown.quick_submit', '.js-quick-submit', (e) => {
   if (!$submitButton.attr('disabled')) {
     $submitButton.trigger('click', [e]);
 
-    if (!gl.utils.isInIssuePage()) {
+    if (!isInIssuePage()) {
       $submitButton.disable();
     }
   }
diff --git a/app/assets/javascripts/confirm_danger_modal.js b/app/assets/javascripts/confirm_danger_modal.js
index b375b61202e..eae4a7eab55 100644
--- a/app/assets/javascripts/confirm_danger_modal.js
+++ b/app/assets/javascripts/confirm_danger_modal.js
@@ -1,4 +1,5 @@
 /* eslint-disable func-names, space-before-function-paren, wrap-iife, one-var, no-var, camelcase, one-var-declaration-per-line, no-else-return, max-len */
+import { rstrip } from './lib/utils/common_utils';
 
 window.ConfirmDangerModal = (function() {
   function ConfirmDangerModal(form, text) {
@@ -12,7 +13,7 @@ window.ConfirmDangerModal = (function() {
     submit.disable();
     $('.js-confirm-danger-input').off('input');
     $('.js-confirm-danger-input').on('input', function() {
-      if (gl.utils.rstrip($(this).val()) === project_path) {
+      if (rstrip($(this).val()) === project_path) {
         return submit.enable();
       } else {
         return submit.disable();
diff --git a/app/assets/javascripts/dispatcher.js b/app/assets/javascripts/dispatcher.js
index f3b537c83e2..ca2de53fe44 100644
--- a/app/assets/javascripts/dispatcher.js
+++ b/app/assets/javascripts/dispatcher.js
@@ -77,6 +77,7 @@ import initProjectVisibilitySelector from './project_visibility';
 import GpgBadges from './gpg_badges';
 import UserFeatureHelper from './helpers/user_feature_helper';
 import initChangesDropdown from './init_changes_dropdown';
+import { ajaxGet } from './lib/utils/common_utils';
 
 (function() {
   var Dispatcher;
@@ -351,7 +352,7 @@ import initChangesDropdown from './init_changes_dropdown';
           if ($('.blob-viewer').length) new BlobViewer();
           if ($('.project-show-activity').length) new gl.Activities();
           $('#tree-slider').waitForImages(function() {
-            gl.utils.ajaxGet(document.querySelector('.js-tree-content').dataset.logsPath);
+            ajaxGet(document.querySelector('.js-tree-content').dataset.logsPath);
           });
           break;
         case 'projects:edit':
@@ -427,7 +428,7 @@ import initChangesDropdown from './init_changes_dropdown';
           new NewCommitForm($('.js-create-dir-form'));
           new UserCallout({ setCalloutPerProject: true });
           $('#tree-slider').waitForImages(function() {
-            gl.utils.ajaxGet(document.querySelector('.js-tree-content').dataset.logsPath);
+            ajaxGet(document.querySelector('.js-tree-content').dataset.logsPath);
           });
           break;
         case 'projects:find_file:show':
diff --git a/app/assets/javascripts/lib/utils/common_utils.js b/app/assets/javascripts/lib/utils/common_utils.js
index b8bebe1894f..87b3b0bc8a4 100644
--- a/app/assets/javascripts/lib/utils/common_utils.js
+++ b/app/assets/javascripts/lib/utils/common_utils.js
@@ -1,437 +1,438 @@
-/* eslint-disable func-names, space-before-function-paren, wrap-iife, no-var, no-unused-expressions, no-param-reassign, no-else-return, quotes, object-shorthand, comma-dangle, camelcase, one-var, vars-on-top, one-var-declaration-per-line, no-return-assign, consistent-return, max-len, prefer-template */
-(function() {
-  (function(w) {
-    var base;
-    const faviconEl = document.getElementById('favicon');
-    const originalFavicon = faviconEl ? faviconEl.getAttribute('href') : null;
-    w.gl || (w.gl = {});
-    (base = w.gl).utils || (base.utils = {});
-    w.gl.utils.isInGroupsPage = function() {
-      return gl.utils.getPagePath() === 'groups';
-    };
-    w.gl.utils.isInProjectPage = function() {
-      return gl.utils.getPagePath() === 'projects';
-    };
-    w.gl.utils.getProjectSlug = function() {
-      if (this.isInProjectPage()) {
-        return $('body').data('project');
-      } else {
-        return null;
-      }
-    };
-    w.gl.utils.getGroupSlug = function() {
-      if (this.isInGroupsPage()) {
-        return $('body').data('group');
-      } else {
-        return null;
-      }
-    };
-
-    w.gl.utils.isInIssuePage = () => {
-      const page = gl.utils.getPagePath(1);
-      const action = gl.utils.getPagePath(2);
-
-      return page === 'issues' && action === 'show';
-    };
-
-    w.gl.utils.ajaxGet = function(url) {
-      return $.ajax({
-        type: "GET",
-        url: url,
-        dataType: "script"
-      });
-    };
-
-    w.gl.utils.ajaxPost = function(url, data) {
-      return $.ajax({
-        type: 'POST',
-        url: url,
-        data: data,
-      });
-    };
-
-    w.gl.utils.extractLast = function(term) {
-      return this.split(term).pop();
-    };
-
-    w.gl.utils.rstrip = function rstrip(val) {
-      if (val) {
-        return val.replace(/\s+$/, '');
-      } else {
-        return val;
-      }
-    };
-
-    gl.utils.updateTooltipTitle = function($tooltipEl, newTitle) {
-      return $tooltipEl.attr('title', newTitle).tooltip('fixTitle');
-    };
-
-    w.gl.utils.disableButtonIfEmptyField = function(field_selector, button_selector, event_name) {
-      event_name = event_name || 'input';
-      var closest_submit, field, that;
-      that = this;
-      field = $(field_selector);
-      closest_submit = field.closest('form').find(button_selector);
-      if (this.rstrip(field.val()) === "") {
-        closest_submit.disable();
-      }
-      return field.on(event_name, function() {
-        if (that.rstrip($(this).val()) === "") {
-          return closest_submit.disable();
-        } else {
-          return closest_submit.enable();
-        }
-      });
-    };
-
-    // automatically adjust scroll position for hash urls taking the height of the navbar into account
-    // https://github.com/twitter/bootstrap/issues/1768
-    w.gl.utils.handleLocationHash = function() {
-      var hash = w.gl.utils.getLocationHash();
-      if (!hash) return;
-
-      // This is required to handle non-unicode characters in hash
-      hash = decodeURIComponent(hash);
-
-      const fixedTabs = document.querySelector('.js-tabs-affix');
-      const fixedDiffStats = document.querySelector('.js-diff-files-changed.is-stuck');
-      const fixedNav = document.querySelector('.navbar-gitlab');
-
-      var adjustment = 0;
-      if (fixedNav) adjustment -= fixedNav.offsetHeight;
-
-      // scroll to user-generated markdown anchor if we cannot find a match
-      if (document.getElementById(hash) === null) {
-        var target = document.getElementById('user-content-' + hash);
-        if (target && target.scrollIntoView) {
-          target.scrollIntoView(true);
-          window.scrollBy(0, adjustment);
-        }
+/* eslint-disable no-param-reassing */
+
+export const getPagePath = (index = 0) => $('body').data('page').split(':')[index];
+window.gl.utils.getPagePath = getPagePath;
+
+export const isInGroupsPage = () => getPagePath() === 'groups';
+window.gl.utils.isInGroupsPage = isInGroupsPage;
+
+export const isInProjectPage = () => getPagePath() === 'projects';
+window.gl.utils.isInProjectPage = isInProjectPage;
+
+export const getProjectSlug = () => {
+  if (isInProjectPage()) {
+    return $('body').data('project');
+  }
+  return null;
+};
+window.gl.utils.getProjectSlug = getProjectSlug;
+
+export const getGroupSlug = () => {
+  if (isInGroupsPage()) {
+    return $('body').data('group');
+  }
+  return null;
+};
+window.gl.utils.getGroupSlug = getGroupSlug;
+
+export const isInIssuePage = () => {
+  const page = getPagePath(1);
+  const action = getPagePath(2);
+
+  return page === 'issues' && action === 'show';
+};
+window.gl.utils.isInIssuePage = isInGroupsPage;
+
+window.gl.utils.ajaxGet = url => $.ajax({
+  type: 'GET',
+  url,
+  dataType: 'script',
+});
+export const ajaxGet = window.gl.utils.ajaxGet;
+
+export const ajaxPost = (url, data) => $.ajax({
+  type: 'POST',
+  url,
+  data,
+});
+window.gl.utils.ajaxPost = ajaxPost;
+
+// TODO: This function seems not to be used anywhere
+window.gl.utils.extractLast = term => this.split(term).pop();
+
+export const rstrip = function rstrip(val) {
+  if (val) {
+    return val.replace(/\s+$/, '');
+  }
+  return val;
+};
+window.gl.utils.rstrip = rstrip;
+
+export const updateTooltipTitle = ($tooltipEl, newTitle) => $tooltipEl.attr('title', newTitle).tooltip('fixTitle');
+window.gl.utils.updateTooltipTitle = updateTooltipTitle;
+
+export const disableButtonIfEmptyField = (fieldSelector, buttonSelector, eventName = 'input') => {
+  const field = $(fieldSelector);
+  const closestSubmit = field.closest('form').find(buttonSelector);
+  if (rstrip(field.val()) === '') {
+    closestSubmit.disable();
+  }
+  return field.on(eventName, () => {
+    if (rstrip($(this).val()) === '') {
+      return closestSubmit.disable();
+    }
+    return closestSubmit.enable();
+  });
+};
+window.gl.utils.disableButtonIfEmptyField = disableButtonIfEmptyField;
+
+// automatically adjust scroll position for hash urls taking the height of the navbar into account
+// https://github.com/twitter/bootstrap/issues/1768
+export const handleLocationHash = () => {
+  let hash = window.gl.utils.getLocationHash();
+  if (!hash) return;
+
+  // This is required to handle non-unicode characters in hash
+  hash = decodeURIComponent(hash);
+
+  const fixedTabs = document.querySelector('.js-tabs-affix');
+  const fixedDiffStats = document.querySelector('.js-diff-files-changed.is-stuck');
+  const fixedNav = document.querySelector('.navbar-gitlab');
+
+  let adjustment = 0;
+  if (fixedNav) adjustment -= fixedNav.offsetHeight;
+
+  // scroll to user-generated markdown anchor if we cannot find a match
+  if (document.getElementById(hash) === null) {
+    const target = document.getElementById(`user-content-${hash}`);
+    if (target && target.scrollIntoView) {
+      target.scrollIntoView(true);
+      window.scrollBy(0, adjustment);
+    }
+  } else {
+    // only adjust for fixedTabs when not targeting user-generated content
+    if (fixedTabs) {
+      adjustment -= fixedTabs.offsetHeight;
+    }
+
+    if (fixedDiffStats) {
+      adjustment -= fixedDiffStats.offsetHeight;
+    }
+
+    window.scrollBy(0, adjustment);
+  }
+};
+window.gl.utils.handleLocationHash = handleLocationHash;
+
+// Check if element scrolled into viewport from above or below
+// Courtesy http://stackoverflow.com/a/7557433/414749
+export const isInViewport = (el) => {
+  const rect = el.getBoundingClientRect();
+
+  return (
+    rect.top >= 0 &&
+    rect.left >= 0 &&
+    rect.bottom <= window.innerHeight &&
+    rect.right <= window.innerWidth
+  );
+};
+window.gl.utils.isInViewport = isInViewport;
+
+export const parseUrl = (url) => {
+  const parser = document.createElement('a');
+  parser.href = url;
+  return parser;
+};
+window.gl.utils.parseUrl = parseUrl;
+
+export const parseUrlPathname = (url) => {
+  const parsedUrl = parseUrl(url);
+  // parsedUrl.pathname will return an absolute path for Firefox and a relative path for IE11
+  // We have to make sure we always have an absolute path.
+  return parsedUrl.pathname.charAt(0) === '/' ? parsedUrl.pathname : `/${parsedUrl.pathname}`;
+};
+window.gl.utils.parseUrlPathname = parseUrlPathname;
+
+// We can trust that each param has one & since values containing & will be encoded
+// Remove the first character of search as it is always ?
+window.gl.utils.getUrlParamsArray = () => window.location.search.slice(1).split('&').map((param) => {
+  const split = param.split('=');
+  return [decodeURI(split[0]), split[1]].join('=');
+});
+
+export const isMetaKey = e => e.metaKey || e.ctrlKey || e.altKey || e.shiftKey;
+window.gl.utils.isMetaKey = isMetaKey;
+
+// Identify following special clicks
+// 1) Cmd + Click on Mac (e.metaKey)
+// 2) Ctrl + Click on PC (e.ctrlKey)
+// 3) Middle-click or Mouse Wheel Click (e.which is 2)
+export const isMetaClick = e => e.metaKey || e.ctrlKey || e.which === 2;
+window.gl.utils.isMetaClick = isMetaClick;
+
+export const scrollToElement = ($el) => {
+  const top = $el.offset().top;
+  const mrTabsHeight = $('.merge-request-tabs').height() || 0;
+  const headerHeight = $('.navbar-gitlab').height() || 0;
+
+  return $('body, html').animate({
+    scrollTop: top - mrTabsHeight - headerHeight,
+  }, 200);
+};
+window.gl.utils.scrollToElement = scrollToElement;
+
+/**
+  this will take in the `name` of the param you want to parse in the url
+  if the name does not exist this function will return `null`
+  otherwise it will return the value of the param key provided
+*/
+export const getParameterByName = (name, urlToParse) => {
+  const url = urlToParse || window.location.href;
+  name = name.replace(/[[\]]/g, '\\$&');
+  const regex = new RegExp(`[?&]${name}(=([^&#]*)|&|#|$)`);
+  const results = regex.exec(url);
+  if (!results) return null;
+  if (!results[2]) return '';
+  return decodeURIComponent(results[2].replace(/\+/g, ' '));
+};
+window.gl.utils.getParameterByName = getParameterByName;
+
+export const getSelectedFragment = () => {
+  const selection = window.getSelection();
+  if (selection.rangeCount === 0) return null;
+  const documentFragment = document.createDocumentFragment();
+  for (let i = 0; i < selection.rangeCount; i += 1) {
+    documentFragment.appendChild(selection.getRangeAt(i).cloneContents());
+  }
+  if (documentFragment.textContent.length === 0) return null;
+
+  return documentFragment;
+};
+window.gl.utils.getSelectedFragment = getSelectedFragment;
+
+export const insertText = (target, text) => {
+  // Firefox doesn't support `document.execCommand('insertText', false, text)` on textareas
+  const selectionStart = target.selectionStart;
+  const selectionEnd = target.selectionEnd;
+  const value = target.value;
+
+  const textBefore = value.substring(0, selectionStart);
+  const textAfter = value.substring(selectionEnd, value.length);
+
+  const insertedText = text instanceof Function ? text(textBefore, textAfter) : text;
+  const newText = textBefore + insertedText + textAfter;
+
+  target.value = newText;
+  target.selectionStart = target.selectionEnd = selectionStart + insertedText.length;
+
+  // Trigger autosave
+  $(target).trigger('input');
+
+  // Trigger autosize
+  const event = document.createEvent('Event');
+  event.initEvent('autosize:update', true, false);
+  target.dispatchEvent(event);
+};
+window.gl.utils.insertText = insertText;
+
+export const nodeMatchesSelector = (node, selector) => {
+  const matches = Element.prototype.matches ||
+    Element.prototype.matchesSelector ||
+    Element.prototype.mozMatchesSelector ||
+    Element.prototype.msMatchesSelector ||
+    Element.prototype.oMatchesSelector ||
+    Element.prototype.webkitMatchesSelector;
+
+  if (matches) {
+    return matches.call(node, selector);
+  }
+
+  // IE11 doesn't support `node.matches(selector)`
+
+  let parentNode = node.parentNode;
+  if (!parentNode) {
+    parentNode = document.createElement('div');
+    node = node.cloneNode(true);
+    parentNode.appendChild(node);
+  }
+
+  const matchingNodes = parentNode.querySelectorAll(selector);
+  return Array.prototype.indexOf.call(matchingNodes, node) !== -1;
+};
+window.gl.utils.nodeMatchesSelector = nodeMatchesSelector;
+
+/**
+  this will take in the headers from an API response and normalize them
+  this way we don't run into production issues when nginx gives us lowercased header keys
+*/
+export const normalizeHeaders = (headers) => {
+  const upperCaseHeaders = {};
+
+  Object.keys(headers).forEach((e) => {
+    upperCaseHeaders[e.toUpperCase()] = headers[e];
+  });
+
+  return upperCaseHeaders;
+};
+window.gl.utils.normalizeHeaders = normalizeHeaders;
+
+/**
+  this will take in the getAllResponseHeaders result and normalize them
+  this way we don't run into production issues when nginx gives us lowercased header keys
+*/
+export const normalizeCRLFHeaders = (headers) => {
+  const headersObject = {};
+  const headersArray = headers.split('\n');
+
+  headersArray.forEach((header) => {
+    const keyValue = header.split(': ');
+    headersObject[keyValue[0]] = keyValue[1];
+  });
+
+  return normalizeHeaders(headersObject);
+};
+window.gl.utils.normalizeCRLFHeaders = normalizeCRLFHeaders;
+
+/**
+ * Parses pagination object string values into numbers.
+ *
+ * @param {Object} paginationInformation
+ * @returns {Object}
+ */
+export const parseIntPagination = paginationInformation => ({
+  perPage: parseInt(paginationInformation['X-PER-PAGE'], 10),
+  page: parseInt(paginationInformation['X-PAGE'], 10),
+  total: parseInt(paginationInformation['X-TOTAL'], 10),
+  totalPages: parseInt(paginationInformation['X-TOTAL-PAGES'], 10),
+  nextPage: parseInt(paginationInformation['X-NEXT-PAGE'], 10),
+  previousPage: parseInt(paginationInformation['X-PREV-PAGE'], 10),
+});
+window.gl.utils.parseIntPagination = parseIntPagination;
+
+/**
+ * Updates the search parameter of a URL given the parameter and value provided.
+ *
+ * If no search params are present we'll add it.
+ * If param for page is already present, we'll update it
+ * If there are params but not for the given one, we'll add it at the end.
+ * Returns the new search parameters.
+ *
+ * @param {String} param
+ * @param {Number|String|Undefined|Null} value
+ * @return {String}
+ */
+export const setParamInURL = (param, value) => {
+  let search;
+  const locationSearch = window.location.search;
+
+  if (locationSearch.length) {
+    const parameters = locationSearch.substring(1, locationSearch.length)
+      .split('&')
+      .reduce((acc, element) => {
+        const val = element.split('=');
+        acc[val[0]] = decodeURIComponent(val[1]);
+        return acc;
+      }, {});
+
+    parameters[param] = value;
+
+    const toString = Object.keys(parameters)
+      .map(val => `${val}=${encodeURIComponent(parameters[val])}`)
+      .join('&');
+
+    search = `?${toString}`;
+  } else {
+    search = `?${param}=${value}`;
+  }
+
+  return search;
+};
+window.gl.utils.setParamInURL = setParamInURL;
+
+/**
+ * Converts permission provided as strings to booleans.
+ *
+ * @param  {String} string
+ * @returns {Boolean}
+ */
+export const convertPermissionToBoolean = permission => permission === 'true';
+window.gl.utils.convertPermissionToBoolean = convertPermissionToBoolean;
+
+/**
+ * Back Off exponential algorithm
+ * backOff :: (Function<next, stop>, Number) -> Promise<Any, Error>
+ *
+ * @param {Function<next, stop>} fn function to be called
+ * @param {Number} timeout
+ * @return {Promise<Any, Error>}
+ * @example
+ * ```
+ *  backOff(function (next, stop) {
+ *    // Let's perform this function repeatedly for 60s or for the timeout provided.
+ *
+ *    ourFunction()
+ *      .then(function (result) {
+ *        // continue if result is not what we need
+ *        next();
+ *
+ *        // when result is what we need let's stop with the repetions and jump out of the cycle
+ *        stop(result);
+ *      })
+ *      .catch(function (error) {
+ *        // if there is an error, we need to stop this with an error.
+ *        stop(error);
+ *      })
+ *  }, 60000)
+ *  .then(function (result) {})
+ *  .catch(function (error) {
+ *    // deal with errors passed to stop()
+ *  })
+ * ```
+ */
+export const backOff = (fn, timeout = 60000) => {
+  const maxInterval = 32000;
+  let nextInterval = 2000;
+  let timeElapsed = 0;
+
+  return new Promise((resolve, reject) => {
+    const stop = arg => ((arg instanceof Error) ? reject(arg) : resolve(arg));
+
+    const next = () => {
+      if (timeElapsed < timeout) {
+        setTimeout(() => fn(next, stop), nextInterval);
+        timeElapsed += nextInterval;
+        nextInterval = Math.min(nextInterval + nextInterval, maxInterval);
       } else {
-        // only adjust for fixedTabs when not targeting user-generated content
-        if (fixedTabs) {
-          adjustment -= fixedTabs.offsetHeight;
-        }
-
-        if (fixedDiffStats) {
-          adjustment -= fixedDiffStats.offsetHeight;
-        }
-
-        window.scrollBy(0, adjustment);
-      }
-    };
-
-    // Check if element scrolled into viewport from above or below
-    // Courtesy http://stackoverflow.com/a/7557433/414749
-    w.gl.utils.isInViewport = function(el) {
-      var rect = el.getBoundingClientRect();
-
-      return (
-        rect.top >= 0 &&
-        rect.left >= 0 &&
-        rect.bottom <= window.innerHeight &&
-        rect.right <= window.innerWidth
-      );
-    };
-
-    gl.utils.getPagePath = function(index) {
-      index = index || 0;
-      return $('body').data('page').split(':')[index];
-    };
-
-    gl.utils.parseUrl = function (url) {
-      var parser = document.createElement('a');
-      parser.href = url;
-      return parser;
-    };
-
-    gl.utils.parseUrlPathname = function (url) {
-      var parsedUrl = gl.utils.parseUrl(url);
-      // parsedUrl.pathname will return an absolute path for Firefox and a relative path for IE11
-      // We have to make sure we always have an absolute path.
-      return parsedUrl.pathname.charAt(0) === '/' ? parsedUrl.pathname : '/' + parsedUrl.pathname;
-    };
-
-    gl.utils.getUrlParamsArray = function () {
-      // We can trust that each param has one & since values containing & will be encoded
-      // Remove the first character of search as it is always ?
-      return window.location.search.slice(1).split('&').map((param) => {
-        const split = param.split('=');
-        return [decodeURI(split[0]), split[1]].join('=');
-      });
-    };
-
-    gl.utils.isMetaKey = function(e) {
-      return e.metaKey || e.ctrlKey || e.altKey || e.shiftKey;
-    };
-
-    gl.utils.isMetaClick = function(e) {
-      // Identify following special clicks
-      // 1) Cmd + Click on Mac (e.metaKey)
-      // 2) Ctrl + Click on PC (e.ctrlKey)
-      // 3) Middle-click or Mouse Wheel Click (e.which is 2)
-      return e.metaKey || e.ctrlKey || e.which === 2;
-    };
-
-    gl.utils.scrollToElement = function($el) {
-      const top = $el.offset().top;
-      const mrTabsHeight = $('.merge-request-tabs').height() || 0;
-      const headerHeight = $('.navbar-gitlab').height() || 0;
-
-      return $('body, html').animate({
-        scrollTop: top - mrTabsHeight - headerHeight,
-      }, 200);
-    };
-
-    /**
-      this will take in the `name` of the param you want to parse in the url
-      if the name does not exist this function will return `null`
-      otherwise it will return the value of the param key provided
-    */
-    w.gl.utils.getParameterByName = (name, parseUrl) => {
-      const url = parseUrl || window.location.href;
-      name = name.replace(/[[\]]/g, '\\$&');
-      const regex = new RegExp(`[?&]${name}(=([^&#]*)|&|#|$)`);
-      const results = regex.exec(url);
-      if (!results) return null;
-      if (!results[2]) return '';
-      return decodeURIComponent(results[2].replace(/\+/g, ' '));
-    };
-
-    w.gl.utils.getSelectedFragment = () => {
-      const selection = window.getSelection();
-      if (selection.rangeCount === 0) return null;
-      const documentFragment = document.createDocumentFragment();
-      for (let i = 0; i < selection.rangeCount; i += 1) {
-        documentFragment.appendChild(selection.getRangeAt(i).cloneContents());
-      }
-      if (documentFragment.textContent.length === 0) return null;
-
-      return documentFragment;
-    };
-
-    w.gl.utils.insertText = (target, text) => {
-      // Firefox doesn't support `document.execCommand('insertText', false, text)` on textareas
-
-      const selectionStart = target.selectionStart;
-      const selectionEnd = target.selectionEnd;
-      const value = target.value;
-
-      const textBefore = value.substring(0, selectionStart);
-      const textAfter = value.substring(selectionEnd, value.length);
-
-      const insertedText = text instanceof Function ? text(textBefore, textAfter) : text;
-      const newText = textBefore + insertedText + textAfter;
-
-      target.value = newText;
-      target.selectionStart = target.selectionEnd = selectionStart + insertedText.length;
-
-      // Trigger autosave
-      $(target).trigger('input');
-
-      // Trigger autosize
-      var event = document.createEvent('Event');
-      event.initEvent('autosize:update', true, false);
-      target.dispatchEvent(event);
-    };
-
-    w.gl.utils.nodeMatchesSelector = (node, selector) => {
-      const matches = Element.prototype.matches ||
-        Element.prototype.matchesSelector ||
-        Element.prototype.mozMatchesSelector ||
-        Element.prototype.msMatchesSelector ||
-        Element.prototype.oMatchesSelector ||
-        Element.prototype.webkitMatchesSelector;
-
-      if (matches) {
-        return matches.call(node, selector);
-      }
-
-      // IE11 doesn't support `node.matches(selector)`
-
-      let parentNode = node.parentNode;
-      if (!parentNode) {
-        parentNode = document.createElement('div');
-        node = node.cloneNode(true);
-        parentNode.appendChild(node);
+        reject(new Error('BACKOFF_TIMEOUT'));
       }
-
-      const matchingNodes = parentNode.querySelectorAll(selector);
-      return Array.prototype.indexOf.call(matchingNodes, node) !== -1;
-    };
-
-    /**
-      this will take in the headers from an API response and normalize them
-      this way we don't run into production issues when nginx gives us lowercased header keys
-    */
-    w.gl.utils.normalizeHeaders = (headers) => {
-      const upperCaseHeaders = {};
-
-      Object.keys(headers).forEach((e) => {
-        upperCaseHeaders[e.toUpperCase()] = headers[e];
-      });
-
-      return upperCaseHeaders;
     };
 
-    /**
-      this will take in the getAllResponseHeaders result and normalize them
-      this way we don't run into production issues when nginx gives us lowercased header keys
-    */
-    w.gl.utils.normalizeCRLFHeaders = (headers) => {
-      const headersObject = {};
-      const headersArray = headers.split('\n');
-
-      headersArray.forEach((header) => {
-        const keyValue = header.split(': ');
-        headersObject[keyValue[0]] = keyValue[1];
-      });
-
-      return w.gl.utils.normalizeHeaders(headersObject);
-    };
-
-    /**
-     * Parses pagination object string values into numbers.
-     *
-     * @param {Object} paginationInformation
-     * @returns {Object}
-     */
-    w.gl.utils.parseIntPagination = paginationInformation => ({
-      perPage: parseInt(paginationInformation['X-PER-PAGE'], 10),
-      page: parseInt(paginationInformation['X-PAGE'], 10),
-      total: parseInt(paginationInformation['X-TOTAL'], 10),
-      totalPages: parseInt(paginationInformation['X-TOTAL-PAGES'], 10),
-      nextPage: parseInt(paginationInformation['X-NEXT-PAGE'], 10),
-      previousPage: parseInt(paginationInformation['X-PREV-PAGE'], 10),
-    });
-
-    /**
-     * Updates the search parameter of a URL given the parameter and value provided.
-     *
-     * If no search params are present we'll add it.
-     * If param for page is already present, we'll update it
-     * If there are params but not for the given one, we'll add it at the end.
-     * Returns the new search parameters.
-     *
-     * @param {String} param
-     * @param {Number|String|Undefined|Null} value
-     * @return {String}
-     */
-    w.gl.utils.setParamInURL = (param, value) => {
-      let search;
-      const locationSearch = window.location.search;
-
-      if (locationSearch.length) {
-        const parameters = locationSearch.substring(1, locationSearch.length)
-          .split('&')
-          .reduce((acc, element) => {
-            const val = element.split('=');
-            acc[val[0]] = decodeURIComponent(val[1]);
-            return acc;
-          }, {});
-
-        parameters[param] = value;
-
-        const toString = Object.keys(parameters)
-          .map(val => `${val}=${encodeURIComponent(parameters[val])}`)
-          .join('&');
-
-        search = `?${toString}`;
+    fn(next, stop);
+  });
+};
+window.gl.utils.backOff = backOff;
+
+export const setFavicon = (faviconPath) => {
+  const faviconEl = document.getElementById('favicon');
+  if (faviconEl && faviconPath) {
+    faviconEl.setAttribute('href', faviconPath);
+  }
+};
+window.gl.utils.setFavicon = setFavicon;
+
+export const resetFavicon = () => {
+  const faviconEl = document.getElementById('favicon');
+  const originalFavicon = faviconEl ? faviconEl.getAttribute('href') : null;
+  if (faviconEl) {
+    faviconEl.setAttribute('href', originalFavicon);
+  }
+};
+window.gl.utils.resetFavicon = resetFavicon;
+
+export const setCiStatusFavicon = (pageUrl) => {
+  $.ajax({
+    url: pageUrl,
+    dataType: 'json',
+    success: (data) => {
+      if (data && data.favicon) {
+        gl.utils.setFavicon(data.favicon);
       } else {
-        search = `?${param}=${value}`;
-      }
-
-      return search;
-    };
-
-    /**
-     * Converts permission provided as strings to booleans.
-     *
-     * @param  {String} string
-     * @returns {Boolean}
-     */
-    w.gl.utils.convertPermissionToBoolean = permission => permission === 'true';
-
-    /**
-     * Back Off exponential algorithm
-     * backOff :: (Function<next, stop>, Number) -> Promise<Any, Error>
-     *
-     * @param {Function<next, stop>} fn function to be called
-     * @param {Number} timeout
-     * @return {Promise<Any, Error>}
-     * @example
-     * ```
-     *  backOff(function (next, stop) {
-     *    // Let's perform this function repeatedly for 60s or for the timeout provided.
-     *
-     *    ourFunction()
-     *      .then(function (result) {
-     *        // continue if result is not what we need
-     *        next();
-     *
-     *        // when result is what we need let's stop with the repetions and jump out of the cycle
-     *        stop(result);
-     *      })
-     *      .catch(function (error) {
-     *        // if there is an error, we need to stop this with an error.
-     *        stop(error);
-     *      })
-     *  }, 60000)
-     *  .then(function (result) {})
-     *  .catch(function (error) {
-     *    // deal with errors passed to stop()
-     *  })
-     * ```
-     */
-    w.gl.utils.backOff = (fn, timeout = 60000) => {
-      const maxInterval = 32000;
-      let nextInterval = 2000;
-      let timeElapsed = 0;
-
-      return new Promise((resolve, reject) => {
-        const stop = arg => ((arg instanceof Error) ? reject(arg) : resolve(arg));
-
-        const next = () => {
-          if (timeElapsed < timeout) {
-            setTimeout(() => fn(next, stop), nextInterval);
-            timeElapsed += nextInterval;
-            nextInterval = Math.min(nextInterval + nextInterval, maxInterval);
-          } else {
-            reject(new Error('BACKOFF_TIMEOUT'));
-          }
-        };
-
-        fn(next, stop);
-      });
-    };
-
-    w.gl.utils.setFavicon = (faviconPath) => {
-      if (faviconEl && faviconPath) {
-        faviconEl.setAttribute('href', faviconPath);
+        gl.utils.resetFavicon();
       }
-    };
-
-    w.gl.utils.resetFavicon = () => {
-      if (faviconEl) {
-        faviconEl.setAttribute('href', originalFavicon);
-      }
-    };
-
-    w.gl.utils.setCiStatusFavicon = (pageUrl) => {
-      $.ajax({
-        url: pageUrl,
-        dataType: 'json',
-        success: function(data) {
-          if (data && data.favicon) {
-            gl.utils.setFavicon(data.favicon);
-          } else {
-            gl.utils.resetFavicon();
-          }
-        },
-        error: function() {
-          gl.utils.resetFavicon();
-        }
-      });
-    };
-  })(window);
-}).call(window);
+    },
+    error: () => {
+      gl.utils.resetFavicon();
+    },
+  });
+};
+window.gl.utils.setCiStatusFavicon = setCiStatusFavicon;
diff --git a/app/assets/javascripts/merge_request_tabs.js b/app/assets/javascripts/merge_request_tabs.js
index 0c3c877ff15..efcda7c38fb 100644
--- a/app/assets/javascripts/merge_request_tabs.js
+++ b/app/assets/javascripts/merge_request_tabs.js
@@ -7,6 +7,7 @@ import './flash';
 import BlobForkSuggestion from './blob/blob_fork_suggestion';
 import initChangesDropdown from './init_changes_dropdown';
 import bp from './breakpoints';
+import parseUrlPathname from './lib/utils/common_utils';
 
 /* eslint-disable max-len */
 // MergeRequestTabs
@@ -260,7 +261,7 @@ import bp from './breakpoints';
 
       // We extract pathname for the current Changes tab anchor href
       // some pages like MergeRequestsController#new has query parameters on that anchor
-      const urlPathname = gl.utils.parseUrlPathname(source);
+      const urlPathname = parseUrlPathname(source);
 
       this.ajaxGet({
         url: `${urlPathname}.json${location.search}`,
diff --git a/app/assets/javascripts/monitoring/components/dashboard.vue b/app/assets/javascripts/monitoring/components/dashboard.vue
index b596c4f383f..a87fe7fa9d3 100644
--- a/app/assets/javascripts/monitoring/components/dashboard.vue
+++ b/app/assets/javascripts/monitoring/components/dashboard.vue
@@ -8,6 +8,7 @@
   import EmptyState from './empty_state.vue';
   import MonitoringStore from '../stores/monitoring_store';
   import eventHub from '../event_hub';
+  import { backOff } from '../../lib/utils/common_utils';
 
   export default {
 
@@ -41,7 +42,7 @@
       getGraphsData() {
         const maxNumberOfRequests = 3;
         this.state = 'loading';
-        gl.utils.backOff((next, stop) => {
+        backOff((next, stop) => {
           this.service.get().then((resp) => {
             if (resp.status === statusCodes.NO_CONTENT) {
               this.backOffRequestCounter = this.backOffRequestCounter += 1;
diff --git a/app/assets/javascripts/notes.js b/app/assets/javascripts/notes.js
index f5f7bb4653d..7146ecb0b3e 100644
--- a/app/assets/javascripts/notes.js
+++ b/app/assets/javascripts/notes.js
@@ -23,6 +23,7 @@ import loadAwardsHandler from './awards_handler';
 import './autosave';
 import './dropzone_input';
 import TaskList from './task_list';
+import { ajaxPost, isInViewport, getPagePath } from './lib/utils/common_utils';
 
 window.autosize = autosize;
 window.Dropzone = Dropzone;
@@ -81,7 +82,7 @@ export default class Notes {
     this.setViewType(view);
 
     // We are in the Merge Requests page so we need another edit form for Changes tab
-    if (gl.utils.getPagePath(1) === 'merge_requests') {
+    if (getPagePath(1) === 'merge_requests') {
       $('.note-edit-form').clone()
         .addClass('mr-note-edit-form').insertAfter('.note-edit-form');
     }
@@ -644,10 +645,10 @@ export default class Notes {
     }
     else {
       var $buttons = $el.find('.note-form-actions');
-      var isWidgetVisible = gl.utils.isInViewport($el.get(0));
+      var isWidgetVisible = isInViewport($el.get(0));
 
       if (!isWidgetVisible) {
-        gl.utils.scrollToElement($el);
+        scrollToElement($el);
       }
 
       $el.find('.js-finish-edit-warning').show();
@@ -1188,7 +1189,7 @@ export default class Notes {
   }
 
   static checkMergeRequestStatus() {
-    if (gl.utils.getPagePath(1) === 'merge_requests') {
+    if (getPagePath(1) === 'merge_requests') {
       gl.mrWidget.checkStatus();
     }
   }
@@ -1326,7 +1327,7 @@ export default class Notes {
    * 2) Identify comment type; a) Main thread b) Discussion thread c) Discussion resolve
    * 3) Build temporary placeholder element (using `createPlaceholderNote`)
    * 4) Show placeholder note on UI
-   * 5) Perform network request to submit the note using `gl.utils.ajaxPost`
+   * 5) Perform network request to submit the note using `ajaxPost`
    *    a) If request is successfully completed
    *        1. Remove placeholder element
    *        2. Show submitted Note element
@@ -1408,7 +1409,7 @@ export default class Notes {
 
     /* eslint-disable promise/catch-or-return */
     // Make request to submit comment on server
-    gl.utils.ajaxPost(formAction, formData)
+    ajaxPost(formAction, formData)
       .then((note) => {
         // Submission successful! remove placeholder
         $notesContainer.find(`#${noteUniqueId}`).remove();
@@ -1510,7 +1511,7 @@ export default class Notes {
 
     /* eslint-disable promise/catch-or-return */
     // Make request to update comment on server
-    gl.utils.ajaxPost(formAction, formData)
+    ajaxPost(formAction, formData)
       .then((note) => {
         // Submission successful! render final note element
         this.updateNote(note, $editingNote);
diff --git a/app/assets/javascripts/notes/stores/actions.js b/app/assets/javascripts/notes/stores/actions.js
index 13cd74bfa1c..923611bda9a 100644
--- a/app/assets/javascripts/notes/stores/actions.js
+++ b/app/assets/javascripts/notes/stores/actions.js
@@ -7,6 +7,7 @@ import * as constants from '../constants';
 import service from '../services/issue_notes_service';
 import loadAwardsHandler from '../../awards_handler';
 import sidebarTimeTrackingEventHub from '../../sidebar/event_hub';
+import { isInViewport, scrollToElement } from '../../lib/utils/common_utils';
 
 let eTagPoll;
 
@@ -211,7 +212,7 @@ export const toggleAwardRequest = ({ commit, getters, dispatch }, data) => {
 };
 
 export const scrollToNoteIfNeeded = (context, el) => {
-  if (!gl.utils.isInViewport(el[0])) {
-    gl.utils.scrollToElement(el);
+  if (!isInViewport(el[0])) {
+    scrollToElement(el);
   }
 };
diff --git a/app/assets/javascripts/profile/profile.js b/app/assets/javascripts/profile/profile.js
index 4ccea0624ee..3deb242bc1f 100644
--- a/app/assets/javascripts/profile/profile.js
+++ b/app/assets/javascripts/profile/profile.js
@@ -1,5 +1,6 @@
 /* eslint-disable comma-dangle, no-unused-vars, class-methods-use-this, quotes, consistent-return, func-names, prefer-arrow-callback, space-before-function-paren, max-len */
 /* global Flash */
+import { getPagePath } from '../lib/utils/common_utils';
 
 ((global) => {
   class Profile {
@@ -93,7 +94,7 @@
         return $title.val(comment[1]).change();
       }
     });
-    if (global.utils.getPagePath() === 'profiles') {
+    if (getPagePath() === 'profiles') {
       return new Profile();
     }
   });
diff --git a/app/assets/javascripts/prometheus_metrics/prometheus_metrics.js b/app/assets/javascripts/prometheus_metrics/prometheus_metrics.js
index ef4d6df5138..a4d50a52315 100644
--- a/app/assets/javascripts/prometheus_metrics/prometheus_metrics.js
+++ b/app/assets/javascripts/prometheus_metrics/prometheus_metrics.js
@@ -1,4 +1,5 @@
 import PANEL_STATE from './constants';
+import { backOff } from '../lib/utils/common_utils';
 
 export default class PrometheusMetrics {
   constructor(wrapperSelector) {
@@ -79,7 +80,7 @@ export default class PrometheusMetrics {
 
   loadActiveMetrics() {
     this.showMonitoringMetricsPanelState(PANEL_STATE.LOADING);
-    gl.utils.backOff((next, stop) => {
+    backOff((next, stop) => {
       $.getJSON(this.activeMetricsEndpoint)
         .done((res) => {
           if (res && res.success) {
diff --git a/app/assets/javascripts/search_autocomplete.js b/app/assets/javascripts/search_autocomplete.js
index 003a15592f3..38c9a71dd20 100644
--- a/app/assets/javascripts/search_autocomplete.js
+++ b/app/assets/javascripts/search_autocomplete.js
@@ -1,4 +1,5 @@
 /* eslint-disable comma-dangle, no-return-assign, one-var, no-var, no-underscore-dangle, one-var-declaration-per-line, no-unused-vars, no-cond-assign, consistent-return, object-shorthand, prefer-arrow-callback, func-names, space-before-function-paren, prefer-template, quotes, class-methods-use-this, no-unused-expressions, no-sequences, wrap-iife, no-lonely-if, no-else-return, no-param-reassign, vars-on-top, max-len */
+import { isInGroupsPage, isInProjectPage, getGroupSlug, getProjectSlug } from './lib/utils/common_utils';
 
 ((global) => {
   const KEYCODE = {
@@ -146,14 +147,14 @@
     }
 
     getCategoryContents() {
-      var dashboardOptions, groupOptions, issuesPath, items, mrPath, name, options, projectOptions, userId, userName, utils;
+      var dashboardOptions, groupOptions, issuesPath, items, mrPath, name, options, projectOptions, userId, userName;
       userId = gon.current_user_id;
       userName = gon.current_username;
-      utils = gl.utils, projectOptions = gl.projectOptions, groupOptions = gl.groupOptions, dashboardOptions = gl.dashboardOptions;
-      if (utils.isInGroupsPage() && groupOptions) {
-        options = groupOptions[utils.getGroupSlug()];
-      } else if (utils.isInProjectPage() && projectOptions) {
-        options = projectOptions[utils.getProjectSlug()];
+      projectOptions = gl.projectOptions, groupOptions = gl.groupOptions, dashboardOptions = gl.dashboardOptions;
+      if (isInGroupsPage() && groupOptions) {
+        options = groupOptions[getGroupSlug()];
+      } else if (isInProjectPage() && projectOptions) {
+        options = projectOptions[getProjectSlug()];
       } else if (dashboardOptions) {
         options = dashboardOptions;
       }
diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js
index a4e34116c33..a8c686e5065 100644
--- a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_memory_usage.js
@@ -1,6 +1,6 @@
 import statusCodes from '../../lib/utils/http_status';
 import { bytesToMiB } from '../../lib/utils/number_utils';
-
+import { backOff } from '../../lib/utils/common_utils';
 import MemoryGraph from '../../vue_shared/components/memory_graph';
 import MRWidgetService from '../services/mr_widget_service';
 
@@ -84,7 +84,7 @@ export default {
       }
     },
     loadMetrics() {
-      gl.utils.backOff((next, stop) => {
+      backOff((next, stop) => {
         MRWidgetService.fetchMetrics(this.metricsUrl)
           .then((res) => {
             if (res.status === statusCodes.NO_CONTENT) {