Is it possible to automatically apply a specific CSS class to my Div based on the return value of a function?
<div class="{{doubleClick === true ? 'cell-select' : 'cell-deselect'}}"></div>The doubleClick function will return true.
Is it possible to automatically apply a specific CSS class to my Div based on the return value of a function?
<div class="{{doubleClick === true ? 'cell-select' : 'cell-deselect'}}"></div>The doubleClick function will return true.
To apply styling dynamically, utilize the ngClass directive and remember to include the parentheses when calling the doubleClick function.
<div [ngClass]="{'cell-select': doubleClick(),'cell-deselect': !doubleClick() }">Content</div>
Alternatively, you can achieve the same result without using ngClass:
<div class="{{doubleClick() ? 'cell-select' : 'cell-deselect'}}"></div>
There are alternative ways to achieve the same result and avoid certain cases. Using {{func()}} or [prop]="func()", Angular evaluates the function whenever there is a UI change, such as clicking another button or typing in a textbox, which may not be directly related to the method itself.
We can invoke the function to update a property and bind that property to the ngClass directive.
template
<div [ngClass]="{'cell-select':clicked ,'cell-deselect': !clicked }"
(dblclick)="doubleClick()">
Content
</div>
component
clicked = false;
doubleClick() {
this.clicked = true;
}
You can toggle a value.
template
<div [ngClass]="{'cell-select':toggled ,'cell-deselect': !toggled }"
(dblclick)="toggleDoubleClick()">
Toggle
</div>
component
toggled= false;
toggleDoubleClick(){
this.toggled = !this.toggled;
}
Check out the StackBlitz demo 👍👍
If you prefer not to create a property, you can handle all the logic in the template.
<div [ngClass]="{'db-clicked':elm.clicked}" #elm (dblclick)="elm.clicked = true">
Double click {{elm.clicked ? ':)' : ':('}}</div>
<button (click)="elm.clicked = false">Reset</button>
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