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Online Javascript Validator validates javascript code and find errors and warnings that can be fixed. See real time validation of your javascript code as you type.

CodeClimate
ESLint
Codacy
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JSLint is a JavaScript program that looks for problems in JavaScript programs.

Which is more popular?
Based on our record, JSLint should be more popular than Javascript Validator. It has been mentioned 5 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | beautifytools.com | jslint.com |
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What each product offers, as listed by its team.

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Why this product is good
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{"teams" => "Development teams who need consistent coding standards across a project can benefit from JSLint’s strict conventions.", "projects" => "Projects that require high code quality and adherence to standards might find JSLint beneficial.", "beginner_developers" => "JSLint can help beginners learn good coding practices by highlighting problematic code patterns and suggesting improvements."}
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JavaScript Chapter 4 - a look at jslint
How often each product is chosen within a category, 0–100% relative to the other.

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Recommendations tracked on public social media and blogs since March 2021.

Try pasting your code into a validator to see if you don't have a typo somewhere: https://beautifytools.com/javascript-validator.php. Source: over 4 years ago
So everything works fine the way I see it and that error only comes up after a few clicks. Since I'm not a js wizard I did put your script code into a javascript validator and it looks like you're missing a couple of semi colons here and... Source: almost 5 years ago
Absolutely - one for the great minds to play with while running in great circles and one that passes https://jslint.com and is allowed to be on the internet. - Source: Hacker News / almost 2 years ago
UPDATE 8/22/2011: found http://jshint.com, it looks much better than http://jslint.com/. Source: over 4 years ago
Use https://jslint.com to find the unescaped quote or whatever that's invalidating the file. Remember to put quote marks in dialogue as \". Source: almost 5 years ago
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