JavaScript有两种数据类型,值类型和引用类型,值类型包括:number、string、boolean、null、undefined,引用类型包括:Object、Arrary、Function,值类型每次赋值都会分配新的空间,而引用类型比如Object,直接修改属性是引用是不会发生变化的,只有赋一个新的对象才会改变引用。 var a= 1; var b = a; b = 2; console.log...
const firstNameNode= firstName[SIGNAL] as SignalNode<string>;//1. Angular 没有公开 class EffectHandle, 我们只能强转类型const effectHandle = effect(() => console.log(firstName())) as EffectRef &{ watcher: Watch };//2. 从 watcher 里拿出 WatchNodeconst effectNode =effectHandle.watcher[SIG...
console.log(selectionModel.hasValue());//trueconsole.log(selectionModel.isEmpty());//false hasValue = true 就是有 selected,isEmpty 是 true 就是没有 selected (空的意思)。 setSelection setSelection 就是先 clear 再 select const selectionModel =newSelectionModel<string>(true); selectionModel.select...
error}=observer;letwatchId;// Simple geolocation API check provides values to publishif('geolocation'innavigator){watchId=navigator.geolocation.watchPosition(next,error);}else{error('Geolocation not available');}// When the consumer unsubscribe
$implicit: string; } @Component({ standalone: true, imports: [NgTemplateOutlet], selector: 'person', template: ` <ng-container *ngTemplateOutlet=" myTemplateRef; context: { $implicit: 'test', xxx: 'xxx' } "></ng-container>
- Previously `null` and `undefined` inputs for `routerLink` were equaivalent to empty string and there was no way to disable the link's navigation. In addition, the `href` is changed from a property `HostBinding()` to an attribute binding (`HostBinding('attr.href')`). The effect ...
[stepTitle] string null [navigationSymbol] {symbol: string, fontFamily?: string} {symbol: ''} [canEnter] function(MovingDirection): boolean | function(MovingDirection): Promise<boolean> | boolean true (stepEnter) function(MovingDirection): void null Directives [awNavigationMode] By default angu...
(null)), // 需要 startWith(null) 触发第一次请求 this.reload$$.pipe(startWith(null)), // 同上 ]) .pipe( takeUntil(this.destroy$$), withLatestFrom(this.retryTimes$), // 忽略 retryTimes 的变更,我们只需要取得它的最新值即可 ) .subscribe(([[context, fetcher, params], retryTimes]) =...
"null" means that model values will be set to null instead of being removed. "empty" means empty strings, "", for model values that has the string type, {} for model values with object type and [] for array type. All other types will be treated as "remove". "remove" deletes the...
Change the local storage prefix during execution Returns: NullmyApp.controller('MainCtrl', function($scope, localStorageService) { //... localStorageService.setPrefix('newPrefix'); //... });getStorageTypeReturns: StringmyApp.controller('MainCtrl', function($scope, localStorageService) { //... ...