首先,确保你已经安装了Angular框架并创建了一个新的Angular项目。 在组件的HTML模板中,使用*ngIf来根据条件控制元素的显示与隐藏。例如,如果条件满足,我们希望显示一个输入框,可以这样写: 代码语言:txt 复制 这里的condition是一个布尔类型的变量,用于控制条件是否满足。value是与输入框绑定...
ngIf与else结合使用时,应该使用<ng-template>元素,并在其上使用ngIf和ngIfElse指令。示例如下: 代码语言:txt 复制 <ng-template #template1> 条件为真时显示的内容 </ng-template> <ng-template #template2> 条件为假时显示的内容 </ng-template> <ng-container *ngTemplateOutlet="template1"></ng-conta...
Condition Failed! </ng-template> You can specify another template using ng-template, give it a variable using # and then reference it in the *ngIf statement with an else clause. You can also use a more explicit syntax with NgIf/Else/Then. It would look something like this: 1 2 3 4...
[转]Angular 4 *ngIf/Else As you may know it wasn’t that many months ago that Angular 2 left RC and went Full Release(back in August). We are already upon the next big release of Angular with v4. Angular 4.0.0-rc.1 was released in late February with rc.2 hot on it’s ...
支持Angular 指令:它可以承载 Angular 的结构性指令,比如 *ngIf、*ngFor 等。 灵活性:有助于简化模板的编写,提升可读性和维护性。 <ng-container> 的基本用法 在Angular 的模板中,<ng-container> 主要被用来包裹结构性指令。这些指令会对内容的渲染进行控制,比如 *ngIf、*ngFor、ngSwitch 等。通过使用 <ng-co...
我们可以有多个 *ngIf 可以根据同一组件内的组件变量值呈现不同的模板。以类似的方式,我们有 [ngSwitch] 它将根据不同的值为我们呈现不同的模板。 我们可以通过引用相应变量的模板引用变量来使用 *ngIf 的引用。 对于前一种情况: Content 1 Content 2 Content 3 对于后者: <ng-container *ngIf="...
I'm writing an app usingIonic Framework(version v1.0.0-beta.11), but I believe this question is rather related with the underlying AngularJS (version v1.2.17). I have a problem when usingng-ifandng-includetogether in the same element. When the condition of theng-ifchanges in the model...
* `*ngIf="condition"`, is generally used, provided * as an attribute of the anchor element for the inserted template. * Angular expands this into a more explicit version, in which the anchor element * is contained in an `<ng-template>` element. ...
Which @angular/* package(s) are the source of the bug?Don't known / otherIs this a regression?NoDescriptionI have a component that has conditional logic using an @if (or *ngIf) condition on a flag, e.g., @if (model.editable) or <ngContainer *ngIf="model.editable"...>, in it...
To add a conditional class in Angular we can pass an object tongClasswhere key is theclassnameandvalueis condition i.e., true or false as shown below. And in the above code, class name will be added only when the condition is true. We can add a single class or multiple classes ...