@angular/cdk
Version:
Angular Material Component Development Kit
59 lines • 5.84 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
/** Cached result Set of input types support by the current browser. */
let supportedInputTypes;
/** Types of `<input>` that *might* be supported. */
const candidateInputTypes = [
// `color` must come first. Chrome 56 shows a warning if we change the type to `color` after
// first changing it to something else:
// The specified value "" does not conform to the required format.
// The format is "#rrggbb" where rr, gg, bb are two-digit hexadecimal numbers.
'color',
'button',
'checkbox',
'date',
'datetime-local',
'email',
'file',
'hidden',
'image',
'month',
'number',
'password',
'radio',
'range',
'reset',
'search',
'submit',
'tel',
'text',
'time',
'url',
'week',
];
/** @returns The input types supported by this browser. */
export function getSupportedInputTypes() {
// Result is cached.
if (supportedInputTypes) {
return supportedInputTypes;
}
// We can't check if an input type is not supported until we're on the browser, so say that
// everything is supported when not on the browser. We don't use `Platform` here since it's
// just a helper function and can't inject it.
if (typeof document !== 'object' || !document) {
supportedInputTypes = new Set(candidateInputTypes);
return supportedInputTypes;
}
let featureTestInput = document.createElement('input');
supportedInputTypes = new Set(candidateInputTypes.filter(value => {
featureTestInput.setAttribute('type', value);
return featureTestInput.type === value;
}));
return supportedInputTypes;
}
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