The Closure Compiler is a tool for making JavaScript download and run faster. It is a true compiler for JavaScript. Instead of compiling from a source language to machine code, it compiles from JavaScript to better JavaScript. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls.
Closure Compiler is a tool in the Build Automation category of a tech stack.
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Closure Library are some of the popular tools that integrate with Closure Compiler. Here's a list of all 1 tools that integrate with Closure Compiler.