@angular/router
Version:
Angular - the routing library
75 lines • 8.71 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.dev/license
*/
import { ɵisPromise as isPromise } from '@angular/core';
import { from, isObservable, of } from 'rxjs';
export function shallowEqualArrays(a, b) {
if (a.length !== b.length)
return false;
for (let i = 0; i < a.length; ++i) {
if (!shallowEqual(a[i], b[i]))
return false;
}
return true;
}
export function shallowEqual(a, b) {
// While `undefined` should never be possible, it would sometimes be the case in IE 11
// and pre-chromium Edge. The check below accounts for this edge case.
const k1 = a ? getDataKeys(a) : undefined;
const k2 = b ? getDataKeys(b) : undefined;
if (!k1 || !k2 || k1.length != k2.length) {
return false;
}
let key;
for (let i = 0; i < k1.length; i++) {
key = k1[i];
if (!equalArraysOrString(a[key], b[key])) {
return false;
}
}
return true;
}
/**
* Gets the keys of an object, including `symbol` keys.
*/
export function getDataKeys(obj) {
return [...Object.keys(obj), ...Object.getOwnPropertySymbols(obj)];
}
/**
* Test equality for arrays of strings or a string.
*/
export function equalArraysOrString(a, b) {
if (Array.isArray(a) && Array.isArray(b)) {
if (a.length !== b.length)
return false;
const aSorted = [...a].sort();
const bSorted = [...b].sort();
return aSorted.every((val, index) => bSorted[index] === val);
}
else {
return a === b;
}
}
/**
* Return the last element of an array.
*/
export function last(a) {
return a.length > 0 ? a[a.length - 1] : null;
}
export function wrapIntoObservable(value) {
if (isObservable(value)) {
return value;
}
if (isPromise(value)) {
// Use `Promise.resolve()` to wrap promise-like instances.
// Required ie when a Resolver returns a AngularJS `$q` promise to correctly trigger the
// change detection.
return from(Promise.resolve(value));
}
return of(value);
}
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