@angular/common
Version:
Angular - commonly needed directives and services
38 lines • 4.01 kB
JavaScript
/**
* @license
* Copyright Google Inc. 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
*/
export function stripPrefix(val, prefix) {
return val.startsWith(prefix) ? val.substring(prefix.length) : val;
}
export function deepEqual(a, b) {
if (a === b) {
return true;
}
else if (!a || !b) {
return false;
}
else {
try {
if ((a.prototype !== b.prototype) || (Array.isArray(a) && Array.isArray(b))) {
return false;
}
return JSON.stringify(a) === JSON.stringify(b);
}
catch (e) {
return false;
}
}
}
export function isAnchor(el) {
return el.href !== undefined;
}
export function isPromise(obj) {
// allow any Promise/A+ compliant thenable.
// It's up to the caller to ensure that obj.then conforms to the spec
return !!obj && typeof obj.then === 'function';
}
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