blur() vs. onblur()

I have a input tag with an onblur event listener:

<input id="myField" type="input" onblur="doSomething(this)" />

Via JavaScript, I want to trigger the blur event on this input so that it, in turn, calls the doSomething function.

My initial thought is to call blur:


But that doesn’t work (though no error).

This does:


Why is that? .click() will call the click event attached to an element via the onclick listener. Why does blur() not work the same way?



works because your element (the <input>) has an attribute called “onblur” whose value is a function. Thus, you can call it. You’re not telling the browser to simulate the actual “blur” event, however; there’s no event object created, for example.

Elements do not have a “blur” attribute (or “method” or whatever), so that’s why the first thing doesn’t work.

Contrary to what pointy says, the blur() method does exist and is a part of the w3c standard. The following exaple will work in every modern browser (including IE):

        <title>Javascript test</title>
        <script type="text/javascript" language="javascript">
            window.onload = function()
                var field = document.getElementById("field");
                var link = document.getElementById("link");
                var output = document.getElementById("output");

                field.onfocus = function() { output.innerHTML += "<br/>field.onfocus()"; };
                field.onblur = function() { output.innerHTML += "<br/>field.onblur()"; };
                link.onmouseover = function() { field.blur(); };
        <form name="MyForm">
            <input type="text" name="field" id="field" />
            <a href=";" id="link">Blur field on hover</a>
            <div id="output"></div>

Note that I used link.onmouseover instead of link.onclick, because otherwise the click itself would have removed the focus.

Read More:   Add multiple window.onload events

I guess it’s just because the onblur event is called as a result of the input losing focus, there isn’t a blur action associated with an input, like there is a click action associated with a button

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