Syntax Normalization

Oxc minifier supports transforming syntaxes to make the output shorter and repetitive.

This feature is enabled by default and can be disabled by setting the compress option to false.

Target

Oxc minifier uses some syntaxes that are only supported in newer environments. You can specify the target environment by setting the target option. The default value is esnext, which allows the use of any syntaxes that are supported by the latest ECMAScript standard. The supported value is same as the target option in the transformer.

import { minify } from "oxc-minify";

const result = minify("lib.js", code, {
  compress: {
    target: "chrome87",
  },
});

Join Variables

By default, consecutive variable declarations are merged into a single declaration. You can disable this behavior by setting the compress.joinVars option to false.

// input
var foo = 1;
var bar = 2;

// output
var foo = 1;
var bar = 2;

// Example
import { minify } from "oxc-minify";

const result = minify("lib.js", code, {
  compress: {
    joinVars: false,
  },
});

Sequences

By default, consecutive statements are merged into a single statement using the comma operator. You can disable this behavior by setting the compress.sequences option to false.

// input
foo();
bar();

// output
foo();
bar();

// Example
import { minify } from "oxc-minify";

const result = minify("lib.js", code, {
  compress: {
    sequences: false,
  },
});