what is ngstyle in angular

Angular Mastery: NgClass & NgStyle

• Overview. NgClass & NgStyle are Angular Directives that allow us to conditionally apply one-to-many classes/styles to an element.
• NgClass. NgClass can receive input via inline declarations, or a property/method from our TypeScript class. ...
• NgStyle. NgClass and NgStyle share a significant amount of functionality and behavior. ...

Full Answer

What is ngmodel and ngbind in Angular JS?

• <!-- when $scope.myValue is truthy (element is restored) -->
• <div ng-if="1"></div>
• <!-- when $scope.myValue is falsy (element is removed) -->
• <div ng-if="0"></div>

How do I use the angular ngclass attribute?

ngClass is a directive in Angular that adds and removes CSS classes on an HTML element. In this article, we are talking about ngClass in Angular only, not ng-class in angular.js. Prerequisites – What is Property Binding? Two things we have to understand first are property binding and interpolation in Angular.

What is angular and why do we use angular?

• It’s recommended to code Angular apps in TypeScript, so you must understand it. ...
• TypeScript is a superset of JavaScript, so you’ll need to be comfortable with it as well.
• It’s a good idea to get the grasp of the Angular CLI to speed up the development process even further.

More items...

What is 'Ng' in angular?

• ng-empty
• ng-not-empty
• ng-touched
• ng-untouched
• ng-valid
• ng-invalid
• ng-dirty
• ng-pending
• ng-pristine

What is the use of NgStyle directive?

The NgStyle directive lets you set a given DOM elements style properties. This sets the background color of the div to green. The above code uses the ternary operator to set the background color to green if the persons country is the UK else red.

What is NgStyle and NgClass in Angular?

NgClass & NgStyle are Angular Directives that allow us to conditionally apply one-to-many classes/styles to an element.

What is difference between NgClass and NgStyle?

ng-style is used to interpolate javascript object into style attribute, not css class. And ng-class directive translates your object into class attribute.

Is NgStyle an attribute directive?

NgStylelink An attribute directive that updates styles for the containing HTML element. Sets one or more style properties, specified as colon-separated key-value pairs.

Why do we use NgClass?

The ngClass directive allows you to dynamically set CSS classes on an HTML element by databinding an expression that represents all classes to be added.

What is the difference between NgClass and class?

ngClass is more powerful. It allows you to bind a string of classes, an array of strings, or an object like in your example. Thanks, although I think "Binding to attributes only supports string values, attributes support any kind of value." may have been mis-typed?

What is the difference between style and ngStyle?

ngStyle is an Angular directive that gives you the flexibility to do this, where as style is a regular HTML property to which you can only bind values one by one. That's the difference between the two of them.

What is directive in Angular?

Directives are classes that add additional behavior to elements in your Angular applications. Use Angular's built-in directives to manage forms, lists, styles, and what users see.

Can we use ngClass and class together?

yes , you can do it. Did you try it? What happened? You can use both class and ngClass as the first one gives you the opportunity to apply a class that you want to implement in all cases under any circumstances and the later to apply classes conditionally.

How do you hover in Ngstyle?

if you want to switch styles on hover, add the following to the button

What is Property binding in Angular?

Property binding in Angular helps you set values for properties of HTML elements or directives. Use property binding to do things such as toggle button functionality, set paths programmatically, and share values between components.

What is the use of ngClass in Angular?

AngularJS ng-class Directive The ng-class directive dynamically binds one or more CSS classes to an HTML element. The value of the ng-class directive can be a string, an object, or an array. If it is a string, it should contain one or more, space-separated class names.

What is styleClass directive

Angular has a lot of built-in attribute directives like ngClass, ngStyle, and ngModel. These directives are non-structure directives or attribute directives, mostly used to change DOM element appearance.

The angular ngStyle directive syntax

With the ngStyle directive, you can set a given DOM element CSS properties from Angular expressions. The element should receive an object with style names as keys and expressions as values that evaluate style values. If we want to set a single style then we can as below.

An Angular ngStyle example

We will have a few examples of the ngStyle directive. The first example is this directive is without any condition. We are setting a background image and background color using this attribute directive.

Angular ngStyle with condition example

In example two we will set style based on condition, if selected is true then anchor font is set to 800 and otherwise 500 font-weight.

Angular ngStyle with inline style object

We can also apply the object on this attribute directive, and the value of it can be set from component typescript.

We can use method in ngClass directive expression

We can also pass the method on this attribute, this method will return an object with a list of styles we want to apply. Let demonstrate an example of it.

Component Styling using ngClass - when to use it?

Most of the styles that we need to apply are always present, and can be simply be applied as standard HTML in our templates, like this:

Some good examples for the use of ngClass

But there are many other state styles that are not natively supported by the browser. These styles could for example include:

Passing a String of CSS classes to ngClass

Its also possible to pass to ngClass a string, that contains all the CSS classes that we want to apply to a given element:

Passing a configuration object to ngClass

The last and most commonly used way that we can configure ngClass is by passing it an object:

Delegating to the component which styles should be applied

coordinate the link between the View definition (the template), and the data passed to the component (the Model)

How to use ngStyle to add embedded styles to our templates

Just like in the case of plain CSS, sometimes there are valid use cases for applying directly styles to an HTML element, although in general this is to be avoided.

Summary

There are a ton of options to style our components using ngClass and ngStyle, so it's important to know which one to use when and why. Here is a short summary:

What is style attribute?

The style attribute is a global attribute that is available to all HTML elements. It lets us provide style information for individual elements, in other words, it lets us style an element inline.

What CSS properties do not take effect?

Some CSS style properties like font-size, margin, padding, width, height, and plenty others need a unit of measurement. The values for these properties are not complete without a unit or the style will not take effect.

Does Angular have a stylesheet?

Angular has a modular design for defining styles. Each component has its own stylesheet which styles only that component. Additionally, there is a global stylesheet for styles that apply to the whole application.

Give Me Some Style, Please!

• Nowadays, all documents containing HTML elements have a stylesheet (I’m lying, of course, there are some with no HTML at all: see what happens when you don’t have a stylesheet). Regardless of technology, you always have to style elements on your website! (Here I go, lying again!) There are many ways to do it. Some of them are more elegant, some of them are more recommended, an…

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Ngstylein Action!

• Before I explain how itshould be used properly, I would like to tell you that what you’re going to do might be wrongand you should definitely check the next section to see why and maybe rethink if you really need to use it. Are you still here? Ok, but remember I warned you. Using the ngStyle directive is pretty straightforward. First of all, it’s included in CommonModule from @angular/co…

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Inline Styles Are Bad!

• You know now how ngStyleis used for inline CSS as well as how to use style attribute binding in Angular.Let’s take a minute to think about why anyone would decide to have inline styles when they can be extracted to external files and just referenced using classes.Developers want to make this one exception (every time!) from the general rules includ...

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Class Binding — A Better Solution!

• In general, you shouldn’t have too many inline styles. Otherwise, it’s time to rethink your design. Those that you already have should be analyzed to see what their purpose is.If there’s no dynamic condition, just move them to the style file. Usually, there’s that one event that you expect will change many styles, such as loading data from a remote server or input data by a user. Then yo…

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Summary

• There are many ways to achieve success with styles. The most important thing is to always think about maintenance and possible extensions in the future. Generally, it’s good to have a split between content and structure (HTML files), presentation (CSS), and behavior (TypeScript) layers. I like thinking about each layer as a book. I prefer to read books without the need to cross–chec…

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