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<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>JS Bin</title>
</head>
<body>
        <form id="login-form" type="post" action="">
            <div class="input-area">
                Username
                <input type="text" class="block no-outline" id="login--name">
            </div>
            <div class="input-area">
                Password
                <input type="password" class="block no-outline" id="login--password">
            </div>
            <input type="submit" class="right block transition--bg" id="login--send" value="ENTER">
            <div class="clear"></div>
        </form>
        <div style="margin-top: 20px;" class="tester">click this tester 1</div>
        <div class="tester">click this tester 2</div>
</body>
</html>
 
function on(t, e, f) {
    if ( e.length ) {
        var l = e.length,
        n = 0;
        for ( ; n < l; n++ ) {
            e[n].addEventListener(t, f, false);
        }
    } else {
        e.addEventListener(t, f, false);
    }
}
function doLogin() {
  alert('please log me in :)');
}
var handle = document.getElementById('login-form'),
    tester = document.getElementsByClassName('tester');
on('submit', handle, doLogin); // Sure, fail.
on('click', tester, doLogin); // Works
/**
The only problem is, how to distinguish between nodeList & selected form?
e.length works good on any nodeList
but e.length can not see single selected by id of a <form> element
*/
Output 300px

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