quick-lint-js: find JavaScript bugs
Over 90× faster than ESLint, quick-lint-js gives you instant feedback as you code. Find bugs in your JavaScript before your finger leaves the keyboard. Lint any JavaScript file with no configuration. const occupation = language + " coder"; const language = "JavaScript"; occupation = "Senior " + occupation; E0057 - use of undeclared variable: ocupationconsole.log(`Welcome, ${ocupationoccupation}!`)
JSHint, a JavaScript Code Quality Tool
Report Cyclomatic complexity Unused variables Undefined variables Warn About == null About debugging code About unsafe for..in About arguments.caller and .callee About assignments if/for/... About functions inside loops About eval About unsafe line breaks About potential typos in logical operators When code is not in strict mode When new is used for side-effects Assume Browser NodeJS jQuery Develo
ESLint - Pluggable JavaScript linter
Find issues ESLint statically analyzes your code to quickly find problems. ESLint is built into most text editors and you can run ESLint as part of your continuous integration pipeline. Learn more about finding issues with ESLint Fix problems automatically Many problems ESLint finds can be automatically fixed. ESLint fixes are syntax-aware so you won't experience errors introduced by traditional f
Overview
What It Is Many JavaScript implementations do not warn against questionable coding practices. Yes, that’s nice for the site that “works best with Internet Explorer” (designed with templates, scripted with snippets copied from forums). But it’s a nightmare when you actually want to write quality, maintainable code. That’s where JavaScript Lint comes in. With JavaScript Lint, you can check all your
The Online JavaScript Lint
All warnings except "option explicit" are enabled in this online edition, although certain warnings are displayed only once. For full control over which warnings are displayed, download the JavaScript Lint software. If you encounter any problems, please report them to Matthias Miller at Info<at>JavaScriptLint.com. Paste your JavaScript, HTML, or URL into the box below:
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