This time I will show you how to use AngularJS to monitor rendering, and what are the precautions for using AngularJS to monitor rendering. The following is a practical case, let's take a look.
Actually it is formed through the ng-repeat
of Angular
, the code in html
It is:
Create a new listbutton
at the bottom of the picture. After clicking, a new will be
push in the
lists array. list
object, the page will be automatically rendered at this time, and a <li>
will be added accordingly, as follows:
NoteMyList1
has always been in the active
state (class="active"
). My requirement is to add the list
after adding it. list is set to
active, that is, after adding it, it becomes the following style:
In the function corresponding to button, after
push the new
list object into the
lists array, use
document.getElementById to obtain it Go to the newly added
object, and then add a
class="active" to it. It turns out that the obtained
DOM object is
null, after searching, we found that the reason is: after pushing the
push object to the
lists array, the array changes, and all
<li>
will be re-rendered. After
push is completed, immediately look for the newly added
DOM object.
DOM has not been rendered yet, so it cannot be obtained. The solution is: use the
AngularJS instruction to monitor whether
ng-repeat is completed, and after the rendering is completed, get the new
<li>
object , there is a lot of related content on this Internet, the code is as follows:
myapp.directive('repeatFinish', function ($timeout) { return { restrict: "C", link: function (scope, element, attr) { if(scope.$last === true){ $timeout(function () { scope.change_list(element[0]); }, 10); } } } });I believe you have mastered the method after reading the case in this article. For more exciting content, please pay attention to other related articles on the PHP Chinese website! Recommended reading:
JS to make a floating layer pop-up effect when the mouse passes over the text
How to use Angular component interaction
The above is the detailed content of How to listen to rendering using AngularJS. For more information, please follow other related articles on the PHP Chinese website!

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