Why return false in javascript

How to multiple version of jQuery? What is jQuery CDN? How to Use the jQuery load Method Difference between document. Is jQuery is a replacement of JavaScript? JQuery or JavaScript which is quicker in execution?

What is the use of param method? How to work with jQuery parent , children and siblings? Difference between parent and parents in jQuery? What does jQuery data function do? How do you check if an element exists or not in jQuery? How to run an event handler only once in jQuery? What is each function in jQuery? Which one is more efficient, document. What is event. PreventDefault in jQuery? The return value from the handler determines if the event is canceled. You should also use Event.

The Event interface's preventDefault method tells the user agent that if the event does not get explicitly handled, its default action should not be taken as it normally would be. Source: MDN Webdocs. The stopPropagation method of the Event interface prevents further propagation of the current event in the capturing and bubbling phases.

In this demo, we cancel an onclick function of a link and prevent the link from being clicked with return false; , preventDefault , and stopPropagation.

Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. When and why to 'return false' in JavaScript? Ask Question. Asked 12 years, 6 months ago. Active 9 months ago. Viewed k times. When and why to return false in JavaScript? Improve this question. Casimir Crystal Add a comment.

Active Oldest Votes. Improve this answer. Chris Jester-Young Chris Jester-Young k 44 44 gold badges silver badges bronze badges. This is particularly good if you want an AJAX form that submits without reloading the page - but also works by submitting and reloading the page when javascript is not available.

Return false is actually overkill for preventing the default action when creating event handlers and can lead to fragile code. Explanation and examples at Douglas Neiner's post here fuelyourcoding. With jQuery, its better to use event. I believe returning false is deprecated and doesn't always work anymore. Sometimes the return false is in the method, does this changes anything?

Show 1 more comment. Otherwise, they'll just be clicking on a link with nothing happening. In a case like this, however, where the option that targets more people is SO simple, I don't see why you wouldn't opt for it. Also, bear in mind that it's not just about people explicitly disabling javascript; it can be: someone else imposing that decision on them, a network problem downloading the JS file, a bug in one line of the JS causing it all to fail.

Many people use extensions like NoScript for a reason. To turn things like javascript off purposefully. Having non-js fallbacks gives you some safety nets for this scenario. The stopPropagation method of the Event interface prevents further propagation of the current event in the capturing and bubbling phases.

In this demo, we cancel an onclick function of a link and prevent the link from being clicked with return false; , preventDefault , and stopPropagation. Asked By: zsharp. Answered By: Chris Jester-Young. Answered By: Nadia Alramli. Answered By: Bobby Jack. Answered By: flyingace. Answered By: geowa4. Answered By: Frank Rosario. Answered By: Jamna. Answered By: rhysclay. Answered By: habibun. Answered By: jet Answered By: HoldOffHunger.

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