Frontend & browser·Modules, bundling and the build
the shipped file is one line, every local variable is a single letter, and the comments are gone.
Minification
Also calledminify, minifier
Rewriting code to be smaller while preserving behaviour: shorter names, no whitespace, collapsed expressions. It typically halves the raw size, though compression on the wire means the marginal gain over gzip is smaller than the raw numbers suggest. It also makes production stack traces unreadable, which is what source maps exist to undo.