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Crate oxc_minifier

Crate oxc_minifier 

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§Oxc Minifier

High-performance JavaScript/TypeScript minifier focused on maximum compression.

§Overview

The Oxc minifier applies a comprehensive set of optimizations to JavaScript code to achieve the smallest possible output while maintaining correctness. It draws inspiration from industry-leading minifiers like Closure Compiler, Terser, esbuild, and SWC.

§Features

  • Maximum Compression: Fixed-point iteration ensures all optimization opportunities are found
  • Comprehensive Optimizations: 17+ transformation passes and growing
  • 100% Correct: Extensive testing with test262, Babel, and TypeScript test suites
  • Fast: Efficient algorithms and arena allocation for performance

§Example

use oxc_minifier::{Minifier, MinifierOptions};
use oxc_allocator::Allocator;
use oxc_parser::Parser;
use oxc_span::SourceType;

let allocator = Allocator::default();
let source_text = "const x = 1 + 1; console.log(x);";
let source_type = SourceType::mjs();
let ret = Parser::new(&allocator, source_text, source_type).parse();
let mut program = ret.program;

let options = MinifierOptions::default();
let minifier = Minifier::new(options);
let result = minifier.minify(&allocator, &mut program);

§Architecture

The minifier consists of:

  • Compressor: Orchestrates the optimization pipeline
  • Peephole Optimizations: Individual transformation passes
  • Mangler: Variable renaming for size reduction

See the crate documentation for more details.

Structs§

CompressOptions
CompressOptionsKeepNames
Compressor
InvalidManglePropertyCacheTarget
An invalid property-mangle cache target.
MangleOptions
MangleOptionsKeepNames
ManglePropertiesOptions
Options for opt-in property-name mangling.
ManglePropertyCache
A property-mangle cache. Some(name) pins the output name and None keeps the property.
Minifier
MinifierOptions
MinifierReturn
PropertyMangleCollection
Property candidates and occupied names collected from one program.
PropertyMangler
Three-phase property-name mangler.
TreeShakeOptions

Enums§

CompressOptionsUnused
PropertyReadSideEffects

Functions§

is_valid_property_mangle_cache_target
Returns whether a user-provided cache target can be emitted in every property position.

Type Aliases§

PropertyMapping
A single-application mapping from original property names to their final names.