Clearing Text Input on Button Click Using AngularJS

In this article, we will explore how to clear a text input field after a button is clicked using AngularJS. Whether you are new to AngularJS or looking to enhance your existing skills, this guide will walk you through the process step-by-step. We will provide a detailed example to help you understand the concepts and techniques involved.

Introduction to AngularJS

AngularJS is a popular JavaScript framework used for building dynamic web applications. It offers a rich set of features and a data binding mechanism that simplifies the development process. In this guide, we will focus on a common task: clearing the value of a text input field when a user clicks a button. This is a useful feature in various applications, such as forms or search functionalities.

Setup Your AngularJS Application

To get started, you need to set up a basic AngularJS application. This includes including the AngularJS library in your project and creating a controller to manage your data.

Step 1: Include AngularJS Library

Add the following script tag to include the AngularJS library in your HTML file:

script src

Step 2: Create a Root Application and Controller

Use the following code to create your root application and a controller:

!DOCTYPE html
html ng-appmyApp
head
  script
    var myApp  ('myApp', []);
  /script
/head
body ng-controllerMyController

Step 3: Bind the Model to the Input Field

Bind the text input field to a model using ng-model:

input typetext ng-modeltextInput /

Step 4: Create a Function to Clear the Input

In the controller, define a function to clear the input value:

('MyController', function($scope) {
    $scope.textInput  '';
    $  function() {
        $scope.textInput  '';
    }
});

Step 5: Trigger the Function on Button Click

Bind the function to the button click event:

button ng-clickclearInput()Clear Input/button

Complete Example

Here is a complete example of how to implement these steps:

!DOCTYPE html
html ng-appmyApp
head
    script src
/head
body ng-controllerMyController
    input typetext ng-modeltextInput /
    button ng-clickclearInput()Clear Input/button
    script
        var myApp  (myApp, []);
        (MyController, function($scope) {
            $scope.textInput  '';
            $  function() {
                $scope.textInput  '';
            }
        });
    /script
/body
/html

Alternative Methods

While the above method is straightforward, there are alternative approaches to achieve the same result. Here are a couple of examples:

Using AngularJS Directives

Another way to clear the input field is by using AngularJS directives. Here is an example:

div
  p{{ text }}/p
/div
input typetext ng-modeltext /
button ng-clicktext  ''Clear Input/button

Using AngularJS 2 Syntax

If you are using AngularJS 2 or a newer version, the syntax is slightly different. Here is an example:

div
  p{{ post }}/p
/div
input typetext [(ngModel)]post /
button (click)post  ''Clear Input/button

Conclusion

Clearing a text input on button click is a fundamental task in web development. By following the steps outlined in this guide, you can easily implement this functionality in your AngularJS applications. Whether you are using AngularJS 1 or 2 , the concept remains the same—simply bind the input field to a model and use the model to clear its value on button click. With this technique, you can create more user-friendly and responsive applications.

Key Points

Include AngularJS library in your project. Create a controller to manage the model. Bind the input field to the model using ng-model. Create a function to clear the model value when the button is clicked. Bind the button click event to the function using ng-click or ng-on-click.

Related Keywords

AngularJS Clear Text Input AngularJS Example