sergzach sergzach - 1 year ago 112
jQuery Question

How to handle <tab> in textarea?

I would like a textarea that handles a situation of pressing tab key.

In default case if you press a tab key then focus leaves the textarea. But what about the situation when user wants to type tab key in textarea?

Can I catch this event and return focus to the textarea and add a tab to a current cursor position?

Answer Source

You can:

$("textarea").keydown(function(e) {
    if(e.keyCode === 9) { // tab was pressed
        // get caret position/selection
        var start = this.selectionStart;
        var end = this.selectionEnd;

        var $this = $(this);
        var value = $this.val();

        // set textarea value to: text before caret + tab + text after caret
        $this.val(value.substring(0, start)
                    + "\t"
                    + value.substring(end));

        // put caret at right position again (add one for the tab)
        this.selectionStart = this.selectionEnd = start + 1;

        // prevent the focus lose
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