Angularjs ng keypress directive-IGI

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The ng-keypress directive in AngularJS is used to bind a function to the keypress event of an HTML element. This event is fired whenever a keyboard key is pressed while the element has focus.

Here is an example of using ng-keypress with an input element:

<input type="text" ng-model="text" ng-keypress="onKeyPress($event)">

In this example, the ng-keypress directive is bound to a function called onKeyPress, which takes the $event object as an argument. The $event object contains information about the keypress event, such as the key code and the target element.

Here is an example of the onKeyPress function:

$scope.onKeyPress = function(event) {
  if (event.keyCode === 13) { // Enter key
    alert('You pressed Enter!');
  }
};

In this example, the onKeyPress function checks if the key code of the keypress event is equal to 13, which corresponds to the Enter key. If the Enter key was pressed, the function displays an alert message.

You can also use the $event.target property to access the target element of the keypress event. Here is an example:

<input type="text" ng-model="text" ng-keypress="onKeyPress($event.target)">

In this example, the onKeyPress function takes the target element as an argument, which can be used to manipulate the element or its attributes. For example, you could change the background color of the input field when the Enter key is pressed:

$scope.onKeyPress = function(target) {
  if (event.keyCode === 13) { // Enter key
    target.style.backgroundColor = 'yellow';
  }
};

In this example, the onKeyPress function sets the backgroundColor style property of the target element to yellow, giving it a yellow background color when the Enter key is pressed.

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Angularjs ng keypress directive