我有一个Twitter Bootstrap表单,当它成为焦点时会获得橙色边框底部。但是输入行上的图标有自己的border-bottom,我不知道如何将Angular中的焦点事件绑定到使图标的border-bottom也为橙色的函数。
<form>
<div class="form-group">
<div class="input-group">
<div class="input-group-prepend">
<div class="input-group-text" id="emailInputIcon"><i class="fal fa-envelope"></i></div>
</div>
<input type="email" class="form-control" id="emailInputLogin" aria-describedby="emailHelp" placeholder="EMAIL">
</div>
</div>
<div class="form-group">
<div class="input-group">
<div class="input-group-prepend">
<div class="input-group-text" id="passwordInputIcon"><i class="fal fa-key"></i></div>
</div>
<input type="password" class="form-control" id="passwordInputLogin" placeholder="PASSWORD">
</div>
</div>
<button type="submit" class="btn btn-primary">Login</button>
</form>
答案 0 :(得分:2)
简单方法就像这样(为了便于阅读而简化):
HTML:
<input (focus)="onInputFocused()" (blur)="onInputBlurred()" />
<div class="icon" #icon></div>
TS:
@ViewChild('icon') icon: ElementRef;
onInputFocused() {
this.icon.nativeElement.style.borderBottom = 'orange 1px solid';
}
onInputBlurred() {
this.icon.nativeElement.style.borderBottom = '';
}
更优雅:
HTML:
<input (focus)="onInputFocused()" (blur)="onInputBlurred()" />
<div class="icon" [ngClass]={'withBorder': focused}></div>
TS:
focused = false;
onInputFocused() {
this.focused = true;
}
onInputBlurred() {
this.focused = false;
}
CSS:
.withBorder {
border-bottom: orange 1px solid;
}
没有Angular,一个普通的CSS解决方案(最好):
HTML:
<div class="has-input">
<input type="text" />
<div class="icon"></div>
</div>
CSS:
.has-input input:focus + .icon {
border-bottom: orange 1px solid;
}