How to dynamically load bindings using JS

This time I will show you how to use JS to dynamically load binding, and what are the precautions on how to use JS to dynamically load binding. The following is a practical case, let's take a look.

Preface

When adding a piece of data, dynamic loading was used to display it on the interface. Later, a serious bug was discovered. Take this note I made as an example. , when I add a piece of data and then click delete, I am prompted whether to delete it, as shown below:

But when I add more than two pieces of data, which number is deleted? It will prompt you several times to confirm the deletion.

After investigation, I finally found the problem.

Text

When content is added dynamically, the events that need to be used in the added p are usually written, such as click events/ Chang events, etc. Take my deletion event as an example. Since the deletion event must be written under the event of adding a note, when the first piece of data is added, it is bound once, when the second piece of data is added, it is bound once, and when the nth piece of data is added, it is bound once. , n times of deletion events have been bound, so when deleting the nth piece of data, you will be prompted n times to confirm the deletion.

Now that the cause of the error has been found, it can be solved. Before binding the delete event, just unbind the last bound event.

Code:

//解绑
$(".deletebtn").off("click");
$(".update").off("change");
//绑定
$(".deletebtn").bind('click', delete_click);
$(".update").bind('change', change_fonts);

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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