Angular - How to apply [ngStyle] conditions

I have a div that I want to style based on a condition.

If styleOne is true I want a background colour of red. If StyleTwo is true, I want the background colour to be blue. I've got half of it working with the below code.

 <div [ngStyle]="styleOne && {'background-color': 'red'}"> 

Is it possible to add a condition to say:

  • if styleOne is true, do this
  • if styleTwo is true, do this?

Edit

I think i've resolved it. It works. Not sure if it's the best way:

<div [ngStyle]="styleOne && {'background-color': 'red'} || styleTwo && {'background-color': 'blue'}"> 

5 Answers

For a single style attribute, you can use the following syntax:

<div [style.background-color]="style1 ? 'red' : (style2 ? 'blue' : null)"> 

I assumed that the background color should not be set if neither style1 nor style2 is true.


Since the question title mentions ngStyle, here is the equivalent syntax with that directive:

<div [ngStyle]="{'background-color': style1 ? 'red' : (style2 ? 'blue' : null) }"> 
0

You can use an inline if inside your ngStyle:

[ngStyle]="styleOne?{'background-color': 'red'} : {'background-color': 'blue'}" 

A batter way in my opinion is to store your background color inside a variable and then set the background-color as the variable value:

[style.background-color]="myColorVaraible" 
[ngStyle]="{'opacity': is_mail_sent ? '0.5' : '1' }" 
<ion-col size="12"> <ion-card *ngIf="data != null" [ngStyle]="{'background-image': 'url(' + data.headerImage + ')'}"> </ion-card> 
0
[ngStyle]="{ 'top': yourVar === true ? widthColumHalf + 'px': '302px' }" 

Your Answer

Sign up or log in

Sign up using Google Sign up using Facebook Sign up using Email and Password

Post as a guest

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

You Might Also Like