html W3Schools is optimized for learning, testing, and training. Examples might be simplified to improve reading and basic understanding. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. w3schools.com THE WORLD'S LARGEST WEB DEVELOPER SITE ## How to add a style on a condition in Angular? Question: How to add a style on a condition in Angular?I have a boolean variable called isPrecondition in my component, and I want to conditionally add a strikethrough style on a button label when isPrecondition is true. However, the style should not be applied when the button is disabled. How can I achieve this in Angular?Here's what I have tried so far: I used the ngClass directive to conditionally apply a CSS class that adds the strikethrough style. But I'm not sure how to also consider the disabled state of the button. I want the strikethrough style only when isPrecondition is true and the button is not disabled. Can someone help me with the correct syntax or approach?Answer: To conditionally add a style in Angular based on multiple conditions, you can use the ngClass directive with an object syntax that evaluates the conditions. In your case, you want to apply a strikethrough style when isPrecondition is true and the button is not disabled. Here's how you can do it:First, define a CSS class for the strikethrough style in your component's CSS file:.strikethrough { text-decoration: line-through;}Then, in your template, use ngClass like this: Button LabelIn this example, the strikethrough class will be applied only when isPrecondition is true and the disabled property is false. Make sure you have the disabled property defined in your component to control the button's disabled state.Alternatively, if you are using inline styles, you can use the ngStyle directive: Button LabelThis will conditionally apply the text-decoration style directly to the button element.Both approaches achieve the same result, so choose the one that fits your project's style management strategy. ## How to add a style on a condition in Angular? Question: How to add a style on a condition in Angular?I have a boolean variable called isPrecondition in my component, and I want to conditionally add a strikethrough style on a button label when isPrecondition is true. However, the style should not be applied when the button is disabled. How can I achieve this in Angular?Here's what I have tried so far: I used the ngClass directive to conditionally apply a CSS class that adds the strikethrough style. But I'm not sure how to also consider the disabled state of the button. I want the strikethrough style only when isPrecondition is true and the button is not disabled. Can someone help me with the correct syntax or approach?Answer: To conditionally add a style in Angular based on multiple conditions, you can use the ngClass directive with an object syntax that evaluates the conditions. In your case, you want to apply a strikethrough style when isPrecondition is true and the button is not disabled. Here's how you can do it:First, define a CSS class for the strikethrough style in your component's CSS file:.strikethrough { text-decoration: line-through;}Then, in your template, use ngClass like this: Button LabelIn this example, the strikethrough class will be applied only when isPrecondition is true and the disabled property is false. Make sure you have the disabled property defined in your component to control the button's disabled state.Alternatively, if you are using inline styles, you can use the ngStyle directive: Button LabelThis will conditionally apply the text-decoration style directly to the button element.Both approaches achieve the same result, so choose the one that fits your project's style management strategy.