How To Check If Cursor Is On An Empty Line Inside Textarea?

How do I check if the cursor is on an empty line inside a textarea? I don't care about word wrapping. I care about lines that were created by hitting Enter. $('textarea').on('chang

Solution 1:

The following should work, but won't in older versions of IE.

// on(..., function() {if( this.value.substr(0,this.selectionStart).match(/(?:^|\r?\n\s*)$/)
 && this.value.substr(this.selectionStart).match(/^(?:\s*\r?\n|$)/)) {
    console.log("empty");
}

EDIT search now explicitly looks for a newline, with further whitespace optional.