Angular 2: How do validate placeholder based on boolean condition

angular

Solution

<textarea [placeholder]="condition ? 'haha' : ''"></textarea>

If the placeholder from API is contained in variable, say: "apiPlaceHol" Then use it like this:

<textarea [placeholder]="condition ? apiPlaceHol : ''"></textarea>

Problem

I have one textbox and initially it would be displaying some placeholder ``` <textarea class="some class" placeholder={{Some placeholder from REST API}}><textarea> ``` I want to disable this placeholder based on some boolean condition?

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