javascript - Replace innerHTML and get back to the original one keeping the events - Stack Overflow

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I have a target div el with some ponents displayed. These ponents have some events attached (on mouse over, on click). I don't control this code neither those events. They are just there. I'd like to render a widget inside this div. To do so I'm doing something like:

var save = el.innerHTML; 
el.innerHTML = "my widget code";

When my widget finishes its process I want to get back to the original content so I do:

el.innerHTML = save;

The ponents previously saved are correctly replaced but the events attached to them don't work anymore.

I can't hide, show divs. I need to replace the innerHTML to have the exact style and positioning.

What would you do in my case? I'm using jQuery if it helps.

Thanks.

I have a target div el with some ponents displayed. These ponents have some events attached (on mouse over, on click). I don't control this code neither those events. They are just there. I'd like to render a widget inside this div. To do so I'm doing something like:

var save = el.innerHTML; 
el.innerHTML = "my widget code";

When my widget finishes its process I want to get back to the original content so I do:

el.innerHTML = save;

The ponents previously saved are correctly replaced but the events attached to them don't work anymore.

I can't hide, show divs. I need to replace the innerHTML to have the exact style and positioning.

What would you do in my case? I'm using jQuery if it helps.

Thanks.

• javascript
• jquery
• html
• dom
• innerhtml

Share Improve this question Follow edited Oct 3, 2012 at 16:51 Jordi P.S. asked Oct 3, 2012 at 16:45 Jordi P.S.Jordi P.S. 4,02877 gold badges3939 silver badges5959 bronze badges 1

• What exactly are you doing to attach the events? innerHTML doesn't bind/unbind events - that's why it's nice to use jQuery's html, append, empty, replaceWith and whatever else methods - they take care of cleaning up jQuery-bound events. The events that are binded (depending on whether you're using jQuery or not) may not reference an element when you overwrite them with innerHTML. What exactly is "my widget code"? – Ian Commented Oct 3, 2012 at 16:46

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3 Answers 3

Sorted by: Reset to default 5

When you serialize DOM elements back to HTML, all the event handlers and bound data are lost.

If you have DOM, work with it, not with HTML:

var save = $(el).children().detach();
$(el).html(widgetHTML);

// later
$(el).empty().append(save);

You might find .detach useful - http://api.jquery./detach/

It does the same as .remove but keeps all the associated jquery element data - which will include any event listeners added with jquery, though you will lose any 'regular dom events' attached.

you'd have to re-attach the element with jQuery too:

var stored = $(el).detach();

//… wait for something to finish, then reattach

stored.appendTo('#outer');

You can delegate the event to your el element since it doesn't seem to change - Those newly added elements did not exist at the time of binding

$(el).on('click','yourelementtoattachevent',function(){
       // replace click with your event/events
       // your code goes here
});

This is assuming you are using jQuery 1.7+, for others use

$(selector).live();                // jQuery 1.3+
$(document).delegate(selector, events, handler);  // jQuery 1.4.3+
$(document).on(events, selector, handler);        // jQuery 1.7+

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