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javascriptjquerydom-eventslive

Simple version of jQuery live function

Is it possible to get anywhere a pure Javascript function for event handler with similar functionality as jQuery's live() ? I need to have the ability to attach events to objects not yet created but both jquery-livequery as well as jquery-events sources are not useful due to dependencies on jQuery core.

Solution

  • Event delegation is quite simple. Take this example:

    Markup:

    <div id="container">
    <p>Test</p>
    <p>Test</p>
    <p>Test</p>
</div>

<button id="add">Add new paragraph</button>

    Script:

    document.getElementById("container").onclick = function(e) {

    // e.target is the target of the event or "source element"
    alert(e.target.innerHTML);
};

// dynamically adds new paragraph on button click
document.getElementById("add").onclick = function() {
    var p = document.createElement("p");
    p.innerHTML = "a new paragraph";
    document.getElementById("container").appendChild(p);
};

    Since the event handler is attached to the parent, it will work for any future elements inserted.

    You can try it here.

    Useful reference: