@swc/core-win32-x64-msvc

What is @swc/core-win32-x64-msvc?

The @swc/core-win32-x64-msvc package is a precompiled binary of the SWC (Speedy Web Compiler) core specifically for Windows 64-bit systems using the MSVC compiler. SWC is a super-fast compiler written in Rust that compiles JavaScript/TypeScript down to efficient, optimized JavaScript code. It is designed to be a faster alternative to Babel with support for modern JavaScript features and TypeScript.

What are @swc/core-win32-x64-msvc's main functionalities?

JavaScript/TypeScript Compilation

This feature allows the compilation of modern JavaScript or TypeScript code into a version compatible with older environments. The code sample demonstrates how to transform a simple piece of JavaScript code to be compatible with ES5 standards.

import { transformSync } from '@swc/core';

const sourceCode = `const x = 1 + 2;`;
const output = transformSync(sourceCode, {
  jsc: {
    target: 'es5'
  }
});
console.log(output.code);

Minification

This feature enables the minification of JavaScript code to reduce its size and improve load times on web pages. The code sample shows how to minify a simple function.

import { transformSync } from '@swc/core';

const sourceCode = `function add(a, b) { return a + b; }`;
const output = transformSync(sourceCode, {
  minify: true
});
console.log(output.code);

Source Maps

This feature provides support for source maps, which help in debugging by mapping the transformed code back to the original source code. The code sample demonstrates generating a source map for a simple expression.

import { transformSync } from '@swc/core';

const sourceCode = `const x = 1 + 2;`;
const output = transformSync(sourceCode, {
  sourceMaps: true
});
console.log(output.map);

Other packages similar to @swc/core-win32-x64-msvc

babel-core

Babel is a well-known JavaScript compiler that also allows transforming JavaScript with plugins. Compared to @swc/core-win32-x64-msvc, Babel is generally slower but has a larger ecosystem of plugins and more extensive configuration options.

typescript

The TypeScript compiler can convert TypeScript code to JavaScript, providing type checking and the latest ECMAScript features. While it does not focus on speed or minification, it is essential for projects that use TypeScript for type safety.

esbuild

Esbuild is a super-fast JavaScript bundler and minifier. It compiles JavaScript and TypeScript like SWC but is focused more on bundling. Esbuild typically performs faster than SWC in bundling scenarios but might have fewer configuration options for language transformations.

README

@swc/core-win32-x64-msvc

This is the x86_64-pc-windows-msvc binary for @swc/core

Changelog

[1.11.10] - 2025-03-17

Bug Fixes

• (es/proposal) Fix declarations for explicit-resource-management (#10198) (99ba555)

• (es/types) Add missing types for jsc.transform.react.refresh (#10206) (e71b000)

• (typescript) Skip the body of ArrowExpr in type usage analysis (#10187) (9aca205)

Documentation

• (es/minifier) Make minifier example utilize comments (#10195) (ec3ebe7)

Features

• (es/fast-parser) Implement the initial version (#10185) (44e7c39)

Miscellaneous Tasks

• (es/minifier) Fix lints & size.sh (#10191) (e862c32)

Performance

• (es/minifier) Do not repeat applying pure minifier on last (#10196) (e6b7cee)

Refactor

• (es/minifier) Remove code for infinite loop (#10194) (fcc6884)

Testing

• (es/minifier) Update test inputs (#10193) (97d8337)

• (es/minifier) Add a benchmark for real-world inputs (#10204) (97f2180)

• (es/minifier) Disable real-world benchmarks on CI (#10205) (c5f1cbe)

• (es/minifier) Test only sizes for large inputs (#10208) (bec3e3e)