Javascript-js Upload problems

These small pieces are generated through the Add button below. if it is a form, it is okay. now it is troublesome. the upload button is a js-written plug-in and must be rendered for use, if append is used, the button cannot be used. Is there a solution.

These small pieces are generated through the Add button below. if it is a form, it is okay, and now it is in trouble,
The upload button is a js-written plug-in that can be used only after rendering. if append is used, the button cannot be used. Is there a solution.

Reply content:

These small pieces are generated through the Add button below. if it is a form, it is okay, and now it is in trouble,
The upload button is a js-written plug-in that can be used only after rendering. if append is used, the button cannot be used. Is there a solution.

Jquery on method:

$ ("Body"). on ("click", 'Upload button id or class name', function () {// trigger Upload event });

JavaScript is used to listen to the click event of the body and trigger the event when event. traget is the target.

In fact, I don't quite understand what you mean by the upload button plug-in written by js. I think it will be called by clicking the button, if not, please describe it in more detail.