1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
import $ from 'jquery';
/**
* This class overrides the browser's validation error bubbles, displaying custom
* error messages for invalid fields instead. To begin validating any form, add the
* class `gl-show-field-errors` to the form element, and ensure error messages are
* declared in each inputs' `title` attribute. If no title is declared for an invalid
* field the user attempts to submit, "This field is required." will be shown by default.
*
* Opt not to validate certain fields by adding the class `gl-field-error-ignore` to the input.
*
* Set a custom error anchor for error message to be injected after with the
* class `gl-field-error-anchor`
*
* Examples:
*
* Basic:
*
* <form class='gl-show-field-errors'>
* <input type='text' name='username' title='Username is required.'/>
* </form>
*
* Ignore specific inputs (e.g. UsernameValidator):
*
* <form class='gl-show-field-errors'>
* <div class="form-group>
* <input type='text' class='gl-field-errors-ignore' pattern='[a-zA-Z0-9-_]+'/>
* </div>
* <div class="form-group">
* <input type='text' name='username' title='Username is required.'/>
* </div>
* </form>
*
* Custom Error Anchor (allows error message to be injected after specified element):
*
* <form class='gl-show-field-errors'>
* <div class="form-group gl-field-error-anchor">
* <input type='text' name='username' title='Username is required.'/>
* // Error message typically injected here
* </div>
* // Error message now injected here
* </form>
*
*/
/**
* Regex Patterns in use:
*
* Only alphanumeric: : "[a-zA-Z0-9]+"
* No special characters : "[a-zA-Z0-9-_]+",
*
*/
const errorMessageClass = 'gl-field-error';
const inputErrorClass = 'gl-field-error-outline';
const errorAnchorSelector = '.gl-field-error-anchor';
const ignoreInputSelector = '.gl-field-error-ignore';
export default class GlFieldError {
constructor({ input, formErrors }) {
this.inputElement = $(input);
this.inputDomElement = this.inputElement.get(0);
this.form = formErrors;
this.errorMessage = this.inputElement.attr('title') || 'This field is required.';
this.fieldErrorElement = $(`<p class='${errorMessageClass} hidden'>${this.errorMessage}</p>`);
this.state = {
valid: false,
empty: true,
submitted: false,
};
this.initFieldValidation();
}
initFieldValidation() {
const customErrorAnchor = this.inputElement.parents(errorAnchorSelector);
const errorAnchor = customErrorAnchor.length ? customErrorAnchor : this.inputElement;
// hidden when injected into DOM
errorAnchor.after(this.fieldErrorElement);
this.inputElement.off('invalid').on('invalid', this.handleInvalidSubmit.bind(this));
this.scopedSiblings = this.safelySelectSiblings();
}
safelySelectSiblings() {
// Apply `ignoreSelector` in markup to siblings whose visibility should not be toggled
const unignoredSiblings = this.inputElement.siblings(`p:not(${ignoreInputSelector})`);
const parentContainer = this.inputElement.parent('.form-group');
// Only select siblings when they're scoped within a form-group with one input
const safelyScoped = parentContainer.length && parentContainer.find('input').length === 1;
return safelyScoped ? unignoredSiblings : this.fieldErrorElement;
}
renderValidity() {
this.renderClear();
if (this.state.valid) {
this.renderValid();
} else if (this.state.empty) {
this.renderEmpty();
} else if (!this.state.valid) {
this.renderInvalid();
}
}
handleInvalidSubmit(event) {
event.preventDefault();
const currentValue = this.accessCurrentValue();
this.state.valid = false;
this.state.empty = currentValue === '';
this.state.submitted = true;
this.renderValidity();
this.form.focusOnFirstInvalid.apply(this.form);
// For UX, wait til after first invalid submission to check each keyup
this.inputElement.off('keyup.fieldValidator')
.on('keyup.fieldValidator', this.updateValidity.bind(this));
}
/* Get or set current input value */
accessCurrentValue(newVal) {
return newVal ? this.inputElement.val(newVal) : this.inputElement.val();
}
getInputValidity() {
return this.inputDomElement.validity.valid;
}
updateValidity() {
const inputVal = this.accessCurrentValue();
this.state.empty = !inputVal.length;
this.state.valid = this.getInputValidity();
this.renderValidity();
}
renderValid() {
return this.renderClear();
}
renderEmpty() {
return this.renderInvalid();
}
renderInvalid() {
this.inputElement.addClass(inputErrorClass);
this.scopedSiblings.addClass('hidden');
return this.fieldErrorElement.removeClass('hidden');
}
renderClear() {
const inputVal = this.accessCurrentValue();
if (!inputVal.split(' ').length) {
const trimmedInput = inputVal.trim();
this.accessCurrentValue(trimmedInput);
}
this.inputElement.removeClass(inputErrorClass);
this.scopedSiblings.addClass('hidden');
this.fieldErrorElement.addClass('hidden');
}
}
|
