ng-class:The ngClass directive allows you to dynamically set CSS classes on an HTML element by databinding an expression that represents all classes to be added.一般里面是一个表达式,请参考ngClass $pristine:是一个boolean值,如果为true,说明user没有和form进行交互,也就是说form没有被修改,参考:$pris...
dynamically. Passing a factory resolver via resolver argument is no longer needed and code can instead use `ViewContainerRef.createComponent` without the factory resolver. - The `RouterEvent` type is no longer present in the `Event` union type representing all router event types. If you have c...
Dynamically rendering components 应用有时需要根据状态动态渲染组件。一些需要动态渲染的例子 Modal,动态弹出的内容 有条件弹出的alert 动态内容的展示 之后会被折叠的内容 这些例子的共同特点是它们不总是需要显示。Angular提供了API来让我们渲染不是一直存在于模板的内容 当我们想动态渲染组件,Angular需要知道什么组件将被...
only have their host bindings refreshed and `ngDoCheck run` during change detection if they are dirty. Previously, a bug in the change detection would result in the `OnPush` configuration of dynamically created components to be ignored when executing host bindings and the `ngDoCheck` function. T...
You may have a look atcore-layout(GitHub repo), an Angular demo app that shows how you can use theiscrolldirective in a responsive-design web-app with support for both drawers (slide-out menus) and modals. For example, the demo shows how to handle DOM content generated dynamically through...
Use this to highlight the contents of and element which will be set dynamically (by setting innerHTML for example). Import the directive and declare it. @Component({ selector:'demo', templateUrl:'demo.component.html', styleUrls:['demo.component.css'] ...
Previously, a bug in the change detection would result in the OnPush configuration of dynamically created components to be ignored when executing host bindings and the ngDoCheck function. This is rarely encountered but can happen if code has a handle on the ComponentRef instance and updates values...
attribute binding (`HostBinding('attr.href')`). The effect of this change is that `DebugElement.properties['href']` will now return the `href` value returned by the native element which will be the full URL rather than the internal value of the `RouterLink` `href` property. ...
The list of available devices is dynamically updated as devices are connected to, or removed from, the user’s computer. The user also sees a preview of the selected video device, as shown below:To implement the settings user interface, replace the contents of the settings/device-select....
Attribute Directives - ngClass, ngStyle Structural Directives - *ngIf, *ngFor # Attribute Directives - [ngClass], [ngStyle] ngClass directive allows us to set CSS class dynamically to the DOM element. Accepted data types string, Array, Object. If Object is passed then keys treated as cla...