Capturing TAB key in text box [closed]

By : Seibar
Source: Stackoverflow.com
Question!

I would like to be able to use the Tab key within the a text box to tab over four spaces. The way it is now, the Tab key jumps my cursor to the next input.

Is there some JavaScript that will capture the Tab key in the text box before it bubbles up to the UI?

I understand some browsers (i.e. FireFox) may not allow this. How about a custom key-combo like Shift+Tab, or Ctrl+Q?

By : Seibar


Answers

Even if you capture the keydown/keyup event, those are the only events that the tab key fires, you still need some way to prevent the default action, moving to the next item in the tab order, from occurring.

In Firefox you can call the preventDefault() method on the event object passed to your event handler. In IE, you have to return false from the event handle. The JQuery library provides a preventDefault method on its event object that works in IE and FF.

<body>
<input type="text" id="myInput">
<script type="text/javascript">
    var myInput = document.getElementById("myInput");
    if(myInput.addEventListener ) {
        myInput.addEventListener('keydown',this.keyHandler,false);
    } else if(myInput.attachEvent ) {
        myInput.attachEvent('onkeydown',this.keyHandler); /* damn IE hack */
    }

    function keyHandler(e) {
        var TABKEY = 9;
        if(e.keyCode == TABKEY) {
            this.value += "    ";
            if(e.preventDefault) {
                e.preventDefault();
            }
            return false;
        }
    }
</script>
</body>
By : ScottKoon


I'd rather tab indentation not work than breaking tabbing between form items.

If you want to indent to put in code in the Markdown box, use Ctrl+K (or ⌘K on a Mac).

In terms of actually stopping the action, jQuery (which Stack Overflow uses) will stop an event from bubbling when you return false from an event callback. This makes life easier for working with multiple browsers.

By : Lauren


there is a problem in best answer given by ScottKoon

here is it

} else if(el.attachEvent ) {
    myInput.attachEvent('onkeydown',this.keyHandler); /* damn IE hack */
}

Should be

} else if(myInput.attachEvent ) {
    myInput.attachEvent('onkeydown',this.keyHandler); /* damn IE hack */
}

Due to this it didn't work in IE. Hoping that ScottKoon will update code



This video can help you solving your question :)
By: admin