![]() Flow adds static typing to JavaScript to improve developer productivity and code quality. Once the full syntax tree is obtained, various static code analysis can be applied to give an insight to the code: syntax visualization, code validation, editing autocomplete with type inferencing and many others.įlow is an open source static type checker developed by Facebook, designed to find type errors in JavaScript program. ESLint is written using Node.js to provide a fast runtime environment and easy installation via npm.Įsprima is a high performance, standard-compliant JavaScript parser. While ESLint will ship with some built-in rules to make it useful from the start, you’ll be able to dynamically load rules at any point in time. They can all follow the same pattern, both for the rules themselves as well as tests. The default rules are written just like any plugin rules would be. ESLint is designed to have all rules completely pluggable. In many ways, it is similar to JSLint and JSHint with a few exceptions. This inferred state-flow graph forms a very powerful vehicle for automating many types of web analysis and testing techniques.ĮSLint is an open source tool static analysis tool for identifying and reporting on patterns found in ECMAScript/JavaScript code. It automatically creates a state-flow graph of the dynamic DOM states and the event-based transitions between them. Crawljax explores JavaScript-based Ajax web application through an event-driven dynamic crawling engine. The ultimate goal of the project is to give insights of ECMAScript 6 code repositories by performing static analysis on not only individual modules, but on several related JavaScript-modules connected to each other, providing a wider range of finding human errors.Ĭrawljax is an open source Java tool for automatically crawling and testing modern web applications. ![]() You can run the static code analyzer over web apps, NativeScript, Ionic, etc.Ĭodemodel-Rifle is an open source tool that analyses ECMAScript 6 code repositories incrementally. The CLI runs as a Node.js process.Ĭodelyzer is an open source project that provides a set of tslint rules for static code analysis of Angular TypeScript projects. Codehawk works by traversing a directory and discovering all supported filetypes, runs a static analysis routine on each file, then performs project-wide analysis such as inter-dependency counting and test coverage mapping. The CLI tool supports unix and windows filesystems (there is a reasonable amount of Windows compatibility code). JavaScript (including TypeScript and Flow) projects are supported for analysis. It is intended as a warning system, to identify complex areas of code that need special attention by developers. You can run it on the command line using the Code Climate CLIĬodehawk is an open source static analysis tool for JavaScript projects. * added Iroh.js, SonarJS, ts-simple-ast, twlyĬodeClimmate-Duplication is an engine that wraps flay and supports Java, Ruby, Python, JavaScript, and PHP. * removed JSCS JavaScript Code Style (merged with ESLint) * added Codelyzer, CodeClimmate-Duplication, NodeJsScan, SourceCodeSniffer * added Nocuous, JScent, JSDeodorant, Semgrep * added Codehawk, Codemodel-Rifle, Insider There are however many different tools that try to achieve the same goal and you might find something more suited to your own needs in the list below, especially if you work in specific JavaScript frameworks and contexts like Node.js, Angular, React, Vue, Express or TypeScript. Developed by the famous Douglas Crockford, JSLint can be considered as the main inspiration of the JavaScript open source code analysis tools family. The two main know open source tools used for JavaScript code analysis are JSLint and JSHint, the second being a fork of the first one. Dynamic code analysis the software when it is performed by executing programs on a real or virtual processor. This automated approach prevents code that is bad or doesn’t respect the coding standards to reach the production stage. If static code analysis can be performed individually on each piece of JavaScript code, modern software development organizations will integrate these tools in their continuous integration or delivery process. This article presents a list of open source tools to perform static and dynamic code analysis on JavaScript programs. There are however tools that allow checking code before or during its execution to assess its quality and its adherence to coding standards using a process called code analysis. The quality of the JavaScript code is often verified with the traditional activities of unit and functional testing.
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