ng-src - Html

The ng-src directive in HTML is used in AngularJS to dynamically set the source of an image or multimedia element. It is an attribute directive that is used on elements like <img>, <audio>, or <video> to bind the source dynamically.

Syntax

The ng-src directive can be used with the following syntax:

<element ng-src="expression"></element>

where expression is the AngularJS expression that resolves to the URL/path of the image or multimedia source.

Purpose

The ng-src directive is useful when you want to load images or multimedia dynamically based on some condition or data from the backend. It allows you to bind the source of an element to a scope variable, which can be updated dynamically.

Using the regular src attribute in such scenarios can lead to broken image links or multimedia not being loaded properly because AngularJS evaluates bindings before the browser updates the src attribute with the new value. The ng-src directive solves this problem by delaying the evaluation until AngularJS has processed the bindings.

Example

Suppose you have the following AngularJS controller:

app.controller('ImageController', function($scope) {
   $scope.imageUrl = 'http://example.com/image.jpg';
});

You can use the ng-src directive as follows:

<img ng-src="{{imageUrl}}" alt="Image">

In this example, the value of the imageUrl scope variable is dynamically bound to the ng-src directive. Whenever the value of imageUrl changes, the image source will be updated accordingly.

Notes

• When using ng-src, make sure the path or URL provided by the expression evaluates to a valid image or multimedia source, otherwise it may result in an invalid or broken image.
• If the source is not set using ng-src and instead directly using src, the browser may try to load the image or multimedia before AngularJS has finished processing, which can lead to incorrect behavior.

For more detailed information, refer to the official AngularJS documentation on ng-src.

This is the complete introductory guide to the ng-src directive in HTML. Markdown format is used for providing easy-to-read and well-formatted content.