我的Angular代码出了什么问题?我得到以下错误:
无法读取BrowserDomAdapter.removeClass中未定义的属性“remove”
<ol>
<li *ngClass="{active: step==='step1'}" (click)="step='step1'">Step1</li>
<li *ngClass="{active: step==='step2'}" (click)="step='step2'">Step2</li>
<li *ngClass="{active: step==='step3'}" (click)="step='step3'">Step3</li>
</ol>
当前回答
ngClass的正常结构是:
[ngClass]="{'classname' : condition}"
所以在你的情况下，就像这样使用它……
<ol class="breadcrumb">
<li [ngClass]="{'active': step==='step1'}" (click)="step='step1'">Step1</li>
<li [ngClass]="{'active': step==='step2'}" (click)="step='step2'">Step2</li>
<li [ngClass]="{'active': step==='step3'}" (click)="step='step3'">Step3</li>
</ol>
其他回答
像这样试试。
用“
<ol class="breadcrumb">
<li *ngClass="{'active': step==='step1'}" (click)="step='step1; '">Step1</li>
<li *ngClass="{'active': step==='step2'}" (click)="step='step2'">Step2</li>
<li *ngClass="{'active': step==='step3'}" (click)="step='step3'">Step3</li>
</ol>
如果用户想显示基于&&和||的类 下面是我的工作
[ngClass]="{'clasname_1': condition_1 && condition_2, 'classname_2': condition_1 && condition2, 'classname_3': condition}"
例子:
[ngClass]="{'approval-panel-mat-drawer-side-left': similar_toil_mode==='side' && showsTheSimilarToilsWithCloseIcon, 'approval-panel-mat-drawer-side-right': similar_toil_mode==='side' && !showsTheSimilarToilsWithCloseIcon, 'approval-panel-mat-drawer-over': similar_toil_mode==='over'}"
ngClass让:
[ngClass]="{'classname' : conditionFlag}"
你可以这样用:
<ol class="breadcrumb">
<li [ngClass]="{'active': step==='step1'}" (click)="step='step1'">Step1</li>
<li [ngClass]="{'active': step==='step2'}" (click)="step='step2'">Step2</li>
<li [ngClass]="{'active': step==='step3'}" (click)="step='step3'">Step3</li>
</ol>
当我创建一个响应式表单时，我必须在按钮上分配2种类型的类。我是这样做的:
<button type="submit" class="btn" [ngClass]="(formGroup.valid)?'btn-info':''"
[disabled]="!formGroup.valid">Sign in</button>
当表单有效时，button具有btn和btn-class (from bootstrap)，否则只有btn类。
你可以使用[ngClass]或[class]。Classname]，两者的工作方式相同。 [class.my-class] = " = = =步step1” 或
[ngClass] = "{“我班”:一步= =“步骤1”}”
两者的效果是一样的!
