ngStyle
is a built-in Angular directive that allows you to dynamically set CSS styles on an HTML element based on the value of an expression in your component.
The ngStyle
directive takes an object as its value, where the keys represent the CSS property names and the values represent the CSS property values. For example:
html<div [ngStyle]="{'color': textColor, 'font-size': fontSize + 'px'}">Hello World!</div>
In this example, the ngStyle
directive is used to set the color
and font-size
CSS properties on a div
element. The values of these properties are determined by expressions in the component's class, namely textColor
and fontSize
.
You can also use the ngStyle
directive with an object variable defined in your component. For example:
html<div [ngStyle]="myStyles">Hello World!</div>
typescriptexport class MyComponent {
myStyles = {
'color': 'red',
'font-size': '20px'
};
}
In this example, the ngStyle
directive is bound to the myStyles
object defined in the component. Any changes to the myStyles
object will be reflected in the styles applied to the div
element.
The ngStyle
directive can be useful for applying dynamic styles based on user interactions or other state changes in your application. It is also more flexible than using the style
attribute directly, as it allows you to apply multiple styles and use expressions to calculate their values.
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