source: trip-planner-front/node_modules/@angular/material/esm2015/form-field/hint.js

Last change on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

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1/**
2 * @license
3 * Copyright Google LLC All Rights Reserved.
4 *
5 * Use of this source code is governed by an MIT-style license that can be
6 * found in the LICENSE file at https://angular.io/license
7 */
8import { Directive, InjectionToken, Input } from '@angular/core';
9let nextUniqueId = 0;
10/**
11 * Injection token that can be used to reference instances of `MatHint`. It serves as
12 * alternative token to the actual `MatHint` class which could cause unnecessary
13 * retention of the class and its directive metadata.
14 *
15 * *Note*: This is not part of the public API as the MDC-based form-field will not
16 * need a lightweight token for `MatHint` and we want to reduce breaking changes.
17 */
18export const _MAT_HINT = new InjectionToken('MatHint');
19/** Hint text to be shown underneath the form field control. */
20export class MatHint {
21 constructor() {
22 /** Whether to align the hint label at the start or end of the line. */
23 this.align = 'start';
24 /** Unique ID for the hint. Used for the aria-describedby on the form field control. */
25 this.id = `mat-hint-${nextUniqueId++}`;
26 }
27}
28MatHint.decorators = [
29 { type: Directive, args: [{
30 selector: 'mat-hint',
31 host: {
32 'class': 'mat-hint',
33 '[class.mat-form-field-hint-end]': 'align === "end"',
34 '[attr.id]': 'id',
35 // Remove align attribute to prevent it from interfering with layout.
36 '[attr.align]': 'null',
37 },
38 providers: [{ provide: _MAT_HINT, useExisting: MatHint }],
39 },] }
40];
41MatHint.propDecorators = {
42 align: [{ type: Input }],
43 id: [{ type: Input }]
44};
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