Prevent Early Form Submission by Hijacking the Enter Key

By  on  

A customer asked me to create a timecard form a few years ago. Everything with the form worked great but users would mistakenly press the enter key before their form was completed. They asked that I make the enter key move the cursor to the next input instead of submitting the form. This is how I'd do that using MooTools JavaScript.

The MooTools JavaScript

var inputs = $$('input.hijack');
$each(inputs,function(el,i) {
	el.addEvent('keypress',function(e) {
		if(e.key == 'enter') { 
			e.stop(); 
			if(inputs[i+1]) { inputs[i+1].focus(); }
			//last one?
			if(i == inputs.length-1) { $('submit-button').focus(); }
		}
	});
});

When the customer hits the enter key, the cursor simply appears in the next input.

While I certainly wouldn't recommend this for every form, it definitely suited this customer's needs.

Recent Features

  • By
    9 Mind-Blowing Canvas Demos

    The <canvas> element has been a revelation for the visual experts among our ranks.  Canvas provides the means for incredible and efficient animations with the added bonus of no Flash; these developers can flash their awesome JavaScript skills instead.  Here are nine unbelievable canvas demos that...

  • By
    7 Essential JavaScript Functions

    I remember the early days of JavaScript where you needed a simple function for just about everything because the browser vendors implemented features differently, and not just edge features, basic features, like addEventListener and attachEvent.  Times have changed but there are still a few functions each developer should...

Incredible Demos

  • By
    Dress Up Your Select Elements with FauxSelect

    I received an email from Ben Delaney a few weeks back about an interesting MooTools script he had written. His script was called FauxSelect and took a list of elements (UL / LI) and transformed it into a beautiful Mac-like SELECT element.

  • By
    pointer Media Query

    As more devices emerge and differences in device interaction are implemented, the more important good CSS code will become.  In order to write good CSS, we need some indicator about device capabilities.  We've used CSS media queries thus far, with checks for max-width and pixel ratios.

Discussion

  1. Ahmed

    Awesome!

  2. JGM

    Outstanding little clip…one I can put into use almost immediately!

  3. Agreed! Excellent and well executed idea. As you say, probably not for all forms — and it might be useful to provide some education with respect to the tab key which is for all forms — but useful for critical processes that must not be interrupted. Well done.

  4. How about the TAB key?

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!