Discovering the source DOM element that initiated ng-change

I am currently working with angularJS and have multiple <select> elements on my webpage, each with its own ng-change function. Here is an example:

<select id="hairColorComponent" ng-model="hairColor"
        ng-options="option.name for option in hairColorData"
        ng-change="updateUserData()">

I would like to find out which specific DOM element was updated within the updateUserData function without needing to manually specify it as a parameter for every ng-change attribute.

Is there an event object or some other method that I can utilize within the scope of the updateUserData function?

Perhaps something along the lines of 

ng-change="updateUserData(caller)"

javascriptangularjs

Answer №1

It is not recommended to directly manipulate the DOM within Angular controllers. Controllers are meant to be independent of the DOM structure. If you find yourself needing to access the DOM from a controller, it may indicate that there is a more suitable approach to solving the problem.

For example, if you have HTML code like:

<select id="hairColorComponent" ng-model="hairColor"
        ng-options="option.name for option in hairColorData"
        ng-change="updateUserData()">

Changing the select element will automatically update the value of $scope.hairColor in your controller. You can then retrieve this value within the updateUserData() function and handle it accordingly.

If, in some rare cases, manipulating the DOM directly is unavoidable, consider creating a custom directive for such tasks. Keep in mind that resorting to direct DOM manipulation should be considered as a last resort in Angular development practices.

Answer №2

After searching through Google, I managed to find a solution to my problem and wanted to share it here.

If you only require the ID, you can simply pass it as a parameter.

<select id="hairColorComponent" ng-model="hairColor"
        ng-options="option.name for option in hairColorData" 
        ng-change="updateUserData('hairColorComponent')">

Although it's not the most elegant solution, it did resolve my issue. To access the DOM element, I resorted to using jQuery.

$scope.updateUserData = function (id) {
    var element = jQuery('#'+id);
};

(For those curious, I'm currently updating outdated code that mysteriously saves user settings across various pages of the website.)

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