ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
46 lines • 5.39 kB
JavaScript
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
import { TemplateRef } from '@angular/core';
export function isNotNil(value) {
return typeof value !== 'undefined' && value !== null;
}
export function isNil(value) {
return typeof value === 'undefined' || value === null;
}
/**
* Examine if two objects are shallowly equaled.
*/
export function shallowEqual(objA, objB) {
if (objA === objB) {
return true;
}
if (typeof objA !== 'object' || !objA || typeof objB !== 'object' || !objB) {
return false;
}
const keysA = Object.keys(objA);
const keysB = Object.keys(objB);
if (keysA.length !== keysB.length) {
return false;
}
const bHasOwnProperty = Object.prototype.hasOwnProperty.bind(objB);
// tslint:disable-next-line:prefer-for-of
for (let idx = 0; idx < keysA.length; idx++) {
const key = keysA[idx];
if (!bHasOwnProperty(key)) {
return false;
}
if (objA[key] !== objB[key]) {
return false;
}
}
return true;
}
export function isNonEmptyString(value) {
return typeof value === 'string' && value !== '';
}
export function isTemplateRef(value) {
return value instanceof TemplateRef;
}
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