examples: fix eslint errors

Run `eslint --fix examples --format unix`. Examples don't have a real
history, so that is acceptable.

8 files changed, 70 insertions, 65 deletions

diff --git a/examples/calc.js b/examples/calc.js
index 7ec6a353..57c30fc5 100644
--- a/examples/calc.js
+++ b/examples/calc.js
@@ -10,7 +10,7 @@ var calc_val = '';
 function update_display() {
     label.set_markup(`<span size='30000'>${calc_val}</span>`);
 
-    if(calc_val === '') {
+    if (calc_val === '') {
         label.set_markup("<span size='30000'>0</span>");
     }
 }
@@ -50,12 +50,12 @@ function pressed_number(button) {
 
 function swap_sign() {
     calc_val = ((calc_val[0] == '-') ?
-        calc_val.substring(1) : '-' + calc_val);
+        calc_val.substring(1) : `-${calc_val}`);
     update_display();
 }
 
 function random_num() {
-    calc_val = Math.floor(Math.random() * 1000) + '';
+    calc_val = `${Math.floor(Math.random() * 1000)}`;
     update_display();
 }
 
@@ -66,7 +66,7 @@ function pack_buttons(buttons, vbox) {
 
     vbox.pack_start(hbox, true, true, 2);
 
-    for(let i = 0; i <= 4; i++) {
+    for (let i = 0; i <= 4; i++) {
         hbox.pack_start(buttons[i], true, true, 1);
     }
 }
@@ -85,35 +85,40 @@ function create_buttons() {
         create_button('←', backspace),
         create_button('↻', random_num),
         create_button('Clr', clear),
-        create_button('±', swap_sign)], vbox);
+        create_button('±', swap_sign)
+    ], vbox);
 
     pack_buttons([
         create_button(')', pressed_number),
         create_button('7', pressed_number),
         create_button('8', pressed_number),
         create_button('9', pressed_number),
-        create_button('/', pressed_operator)], vbox);
+        create_button('/', pressed_operator)
+    ], vbox);
 
     pack_buttons([
         create_button('sin(', pressed_number),
         create_button('4', pressed_number),
         create_button('5', pressed_number),
         create_button('6', pressed_number),
-        create_button('*', pressed_operator)], vbox);
+        create_button('*', pressed_operator)
+    ], vbox);
 
     pack_buttons([
         create_button('cos(', pressed_number),
         create_button('1', pressed_number),
         create_button('2', pressed_number),
         create_button('3', pressed_number),
-        create_button('-', pressed_operator)], vbox);
+        create_button('-', pressed_operator)
+    ], vbox);
 
     pack_buttons([
         create_button('tan(', pressed_number),
         create_button('0', pressed_number),
         create_button('.', pressed_number),
         create_button('=', pressed_equals),
-        create_button('+', pressed_operator)], vbox);
+        create_button('+', pressed_operator)
+    ], vbox);
 
     return vbox;
 }
diff --git a/examples/clutter.js b/examples/clutter.js
index a6b50edd..2fc3eabb 100644
--- a/examples/clutter.js
+++ b/examples/clutter.js
@@ -4,14 +4,14 @@ Clutter.init(null);
 
 let stage = new Clutter.Stage();
 
-let texture = new Clutter.Texture({ filename: 'test.jpg',
-                                    reactive: true });
+let texture = new Clutter.Texture({filename: 'test.jpg',
+    reactive: true});
 
 texture.connect('button-press-event',
-                function(o, event) {
-                    log('Clicked!');
-                    return true;
-                });
+    function(o, event) {
+        log('Clicked!');
+        return true;
+    });
 
 let color = new Clutter.Color();
 color.from_string('Black');
diff --git a/examples/gettext.js b/examples/gettext.js
index 3c67be71..25236ebd 100644
--- a/examples/gettext.js
+++ b/examples/gettext.js
@@ -2,13 +2,13 @@ imports.gi.versions.Gtk = '3.0';
 const Gettext = imports.gettext;
 const Gtk = imports.gi.Gtk;
 
-Gettext.bindtextdomain("gnome-panel-3.0", "/usr/share/locale");
-Gettext.textdomain("gnome-panel-3.0");
+Gettext.bindtextdomain('gnome-panel-3.0', '/usr/share/locale');
+Gettext.textdomain('gnome-panel-3.0');
 
 Gtk.init(null);
 
-let w = new Gtk.Window({ type: Gtk.WindowType.TOPLEVEL });
-w.add(new Gtk.Label({ label: Gettext.gettext("Panel") }));
+let w = new Gtk.Window({type: Gtk.WindowType.TOPLEVEL});
+w.add(new Gtk.Label({label: Gettext.gettext('Panel')}));
 w.show_all();
 
 Gtk.main();
diff --git a/examples/gio-cat.js b/examples/gio-cat.js
index f26e7108..5b058d1a 100644
--- a/examples/gio-cat.js
+++ b/examples/gio-cat.js
@@ -11,7 +11,7 @@ function cat(filename) {
         try {
             contents = f.load_contents_finish(res)[1];
         } catch (e) {
-            log("*** ERROR: " + e.message);
+            log(`*** ERROR: ${e.message}`);
             loop.quit();
             return;
         }
@@ -23,7 +23,7 @@ function cat(filename) {
 }
 
 if (ARGV.length != 1) {
-    printerr("Usage: gio-cat.js filename");
+    printerr('Usage: gio-cat.js filename');
 } else {
     cat(ARGV[0]);
 }
diff --git a/examples/gtk-application.js b/examples/gtk-application.js
index 65084c11..4e81183d 100644
--- a/examples/gtk-application.js
+++ b/examples/gtk-application.js
@@ -3,7 +3,7 @@ const System = imports.system;
 
 // Include this in case both GTK3 and GTK4 installed, otherwise an exception
 // will be thrown
-imports.gi.versions.Gtk = "3.0";
+imports.gi.versions.Gtk = '3.0';
 
 const Gio = imports.gi.Gio;
 const GLib = imports.gi.GLib;
@@ -15,27 +15,27 @@ const Gtk = imports.gi.Gtk;
 //     https://wiki.gnome.org/HowDoI/GtkApplication
 var ExampleApplication = GObject.registerClass({
     Properties: {
-        "exampleprop": GObject.ParamSpec.string(
-            "exampleprop",                      // property name
-            "ExampleProperty",                  // nickname
-            "An example read write property",   // description
+        'exampleprop': GObject.ParamSpec.string(
+            'exampleprop',                      // property name
+            'ExampleProperty',                  // nickname
+            'An example read write property',   // description
             GObject.ParamFlags.READWRITE,       // read/write/construct...
-            ""                                  // implement defaults manually
+            ''                                  // implement defaults manually
         )
     },
-    Signals: { "examplesig": { param_types: [ GObject.TYPE_INT ] } },
+    Signals: {'examplesig': {param_types: [GObject.TYPE_INT]}},
 }, class ExampleApplication extends Gtk.Application {
     _init() {
         super._init({
-            application_id: "org.gnome.gjs.ExampleApplication",
+            application_id: 'org.gnome.gjs.ExampleApplication',
             flags: Gio.ApplicationFlags.FLAGS_NONE
         });
     }
     
     // Example property getter/setter
     get exampleprop() {
-        if (typeof this._exampleprop === "undefined") {
-            return "a default value";
+        if (typeof this._exampleprop === 'undefined') {
+            return 'a default value';
         }
         
         return this._exampleprop;
@@ -45,12 +45,12 @@ var ExampleApplication = GObject.registerClass({
         this._exampleprop = value;
         
         // notify() has to be called, if you want it
-        this.notify("exampleprop");
+        this.notify('exampleprop');
     }
     
     // Example signal emission
     emit_examplesig(number) {
-        this.emit("examplesig", number);
+        this.emit('examplesig', number);
     }
     
     vfunc_startup() {
@@ -58,15 +58,15 @@ var ExampleApplication = GObject.registerClass({
         
         // An example GAction, see: https://wiki.gnome.org/HowDoI/GAction
         let exampleAction = new Gio.SimpleAction({
-            name: "exampleAction",
-            parameter_type: new GLib.VariantType("s")
+            name: 'exampleAction',
+            parameter_type: new GLib.VariantType('s')
         });
         
-        exampleAction.connect("activate", (action, param) => {
+        exampleAction.connect('activate', (action, param) => {
             param = param.deep_unpack().toString();
             
-            if (param === "exampleParameter") {
-                log("Yes!");
+            if (param === 'exampleParameter') {
+                log('Yes!');
             }
         });
         
@@ -81,15 +81,15 @@ var ExampleApplication = GObject.registerClass({
         // Example ApplicationWindow
         let window = new Gtk.ApplicationWindow({
             application: this,
-            title: "Example Application Window",
+            title: 'Example Application Window',
             default_width: 300,
             default_height: 200
         });
         
-        let label = new Gtk.Label({ label: this.exampleprop });
+        let label = new Gtk.Label({label: this.exampleprop});
         window.add(label);
         
-        window.connect("delete-event", () => {
+        window.connect('delete-event', () => {
             this.quit();
         });
         
@@ -97,10 +97,10 @@ var ExampleApplication = GObject.registerClass({
         
         // Example GNotification, see: https://developer.gnome.org/GNotification/
         let notif = new Gio.Notification();
-        notif.set_title("Example Notification");
-        notif.set_body("Example Body");
+        notif.set_title('Example Notification');
+        notif.set_body('Example Body');
         notif.set_icon(
-            new Gio.ThemedIcon({ name: "dialog-information-symbolic" })
+            new Gio.ThemedIcon({name: 'dialog-information-symbolic'})
         );
         
         // A default action for when the body of the notification is clicked
@@ -108,16 +108,16 @@ var ExampleApplication = GObject.registerClass({
         
         // A button for the notification
         notif.add_button(
-            "Button Text",
+            'Button Text',
             "app.exampleAction('exampleParameter')"
         );
         
         // This won't actually be shown, since an application needs a .desktop
         // file with a base name matching the application id
-        this.send_notification("example-notification", notif);
+        this.send_notification('example-notification', notif);
         
         // Withdraw
-        this.withdraw_notification("example-notification");
+        this.withdraw_notification('example-notification');
     }
 });
 
diff --git a/examples/gtk.js b/examples/gtk.js
index ec3a29df..dc22a311 100644
--- a/examples/gtk.js
+++ b/examples/gtk.js
@@ -1,6 +1,6 @@
 // Include this in case both GTK3 and GTK4 installed, otherwise an exception
 // will be thrown
-imports.gi.versions.Gtk = "3.0";
+imports.gi.versions.Gtk = '3.0';
 const Gtk = imports.gi.Gtk;
 
 // Initialize Gtk before you start calling anything from the import
@@ -9,7 +9,7 @@ Gtk.init(null);
 // Construct a top-level window
 let window = new Gtk.Window ({
     type: Gtk.WindowType.TOPLEVEL,
-    title: "A default title",
+    title: 'A default title',
     default_width: 300,
     default_height: 250,
     // A decent example of how constants are mapped:
@@ -20,11 +20,11 @@ let window = new Gtk.Window ({
 
 // Object properties can also be set or changed after construction, unless they
 // are marked construct-only.
-window.title = "Hello World!";
+window.title = 'Hello World!';
 
 // This is a callback function
 function onDeleteEvent(widget, event) {
-    log("delete-event emitted");
+    log('delete-event emitted');
     // If you return false in the "delete_event" signal handler, Gtk will emit
     // the "destroy" signal.
     //
@@ -36,20 +36,20 @@ function onDeleteEvent(widget, event) {
 // When the window is given the "delete_event" signal (this is given by the
 // window manager, usually by the "close" option, or on the titlebar), we ask
 // it to call the onDeleteEvent() function as defined above.
-window.connect("delete-event", onDeleteEvent);
+window.connect('delete-event', onDeleteEvent);
 
 // GJS will warn when calling a C function with unexpected arguments...
 //
 //     window.connect("destroy", Gtk.main_quit);
 //
 // ...so use arrow functions for inline callbacks with arguments to adjust
-window.connect("destroy", () => {
+window.connect('destroy', () => {
     Gtk.main_quit();
 });
 
 // Create a button to close the window
 let button = new Gtk.Button({
-    label: "Close the Window",
+    label: 'Close the Window',
     // Set visible to 'true' if you don't want to call button.show() later
     visible: true,
     // Another example of constant mapping:
@@ -60,7 +60,7 @@ let button = new Gtk.Button({
 });
 
 // Connect to the 'clicked' signal, using another way to call an arrow function
-button.connect("clicked", () => window.destroy());
+button.connect('clicked', () => window.destroy());
 
 // Add the button to the window
 window.add(button);
diff --git a/examples/http-server.js b/examples/http-server.js
index 36c73f02..a49f0727 100644
--- a/examples/http-server.js
+++ b/examples/http-server.js
@@ -4,22 +4,22 @@ const Soup = imports.gi.Soup;
 
 function main() {
     let handler = function(server, msg, path, query, client) {
-	msg.status_code = 200;
-	msg.response_headers.set_content_type('text/html', {});
-	msg.response_body.append('<html><body>Greetings, visitor from ' + client.get_host() + '<br>What is your name?<form action="/hello"><input name="myname"></form></body></html>\n');
+        msg.status_code = 200;
+        msg.response_headers.set_content_type('text/html', {});
+        msg.response_body.append(`<html><body>Greetings, visitor from ${client.get_host()}<br>What is your name?<form action="/hello"><input name="myname"></form></body></html>\n`);
     };
     let helloHandler = function(server, msg, path, query, client) {
-	if (!query) {
+        if (!query) {
 	    msg.set_redirect(302, '/');
 	    return;
-	}
+        }
 
-	msg.status_code = 200;
-	msg.response_headers.set_content_type('text/html', { charset: 'UTF-8' });
-	msg.response_body.append('<html><body>Hello, ' + query.myname + '! \u263A<br><a href="/">Go back</a></body></html>');
+        msg.status_code = 200;
+        msg.response_headers.set_content_type('text/html', {charset: 'UTF-8'});
+        msg.response_body.append(`<html><body>Hello, ${query.myname}! \u263A<br><a href="/">Go back</a></body></html>`);
     };
 
-    let server = new Soup.Server({ port: 1080 });
+    let server = new Soup.Server({port: 1080});
     server.add_handler('/', handler);
     server.add_handler('/hello', helloHandler);
     server.run();
diff --git a/examples/webkit.js b/examples/webkit.js
index 1d932cfc..f3c117a8 100644
--- a/examples/webkit.js
+++ b/examples/webkit.js
@@ -8,7 +8,7 @@ Gtk.init(null);
 let win = new Gtk.Window();
 
 let view = new WebKit.WebView();
-view.load_uri("http://www.google.com/");
+view.load_uri('http://www.google.com/');
 win.add(view);
 
 win.connect('destroy', () => {