Implement an event listener on an element dynamically inserted into the DOM through an AJAX request

My issue involves a set of checkboxes being dynamically added to a document using an Ajax call.

<input type='checkbox' checked class='import'>
<input type='checkbox' checked class='import'>
<input type='checkbox' checked class='import'>
<input type='checkbox' checked class='import'>
<input type='checkbox' checked class='import'>

In addition, I have implemented some JavaScript code using the prototype framework.

function check_toggle(obj, e) {
    if   (e.shiftKey)   {obj.checked=!obj.checked;}
    else if (e.altKey)  {obj.checked=true;}
    else if (e.ctrlKey)    {obj.checked=false;}
}
$$('.import').each(function(obj){
    Event.observe(obj, "mouseover", function(e){alert('here');}.bind(this))
});

Everything works fine if the checkboxes are already present on the page during page load.

However, I encounter an issue if I try to call the "$$" method after the checkboxes have been added dynamically to the DOM via AJAX. The event listeners are not being picked up.

Therefore, I am seeking a solution to make prototype re-evaluate the current state of the DOM. Any suggestions or workarounds would be greatly appreciated.

I have attempted various methods such as calling the $$ function within the onSuccess callback, as a separate function after the AJAX call, and even outputting the entire $$ function as part of the AJAX values. Unfortunately, none of these attempts have been successful.

Your assistance is highly valued. Thank you.

Answer №1

It was surprisingly simple.

function ajax_load_keyset(obj) {
    url             = '/myurl.html';
    params          = 'id='+obj.value;
    new Ajax.Updater(   'checks_go_here',
                    url, {
                    method:'post',
                    parameters:params,
                    evalScripts: true,   // Make sure to include this line   
                    onSuccess:  function(result){}
                });
}

After adding evalScripts: true to the ajax call and including the $$ function on the /myurl.html page at the end, everything worked perfectly.

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