Wikipedia
JSHint
JSHint is a static code analysis tool used in software development for checking if JavaScript source code complies with coding rules. It was forked from Douglas Crockford's JSLint project, as it was felt that the original did not allow enough customization options. There is also an internet version available at its official website in which users can paste code to run the application online. A command-line version of JSHint, distributed as a Node.js module, makes it possible to automate one's linting process and integrate JSHint into the website's development workflow.