AngularJS: API: ng/directive/ngChecked


ngChecked

  1. - directive in module ng

The HTML specification does not require browsers to preserve the values of boolean attributes such as checked. (Their presence means true and their absence means false.) If we put an Angular interpolation expression into such an attribute then the binding information would be lost when the browser removes the attribute. The ngChecked directive solves this problem for the checked attribute. This complementary directive is not removed by the browser and so provides a permanent reliable place to store the binding information.

Directive Info

  • This directive executes at priority level 100.

Usage

  • as attribute:
    <INPUT
      ng-checked="">
    ...
    </INPUT>

Arguments

ParamTypeDetails
ngCheckedexpression

If the expression is truthy, then special attribute "checked" will be set on the element

Example

index.html
Check me to check both: <input type="checkbox" ng-model="master"><br/><input id="checkSlave" type="checkbox" ng-checked="master">
protractor.js
it('should check both checkBoxes', function() {
  expect(element(by.id('checkSlave')).getAttribute('checked')).toBeFalsy();
  element(by.model('master')).click();
  expect(element(by.id('checkSlave')).getAttribute('checked')).toBeTruthy();});