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transpile

helper​

  • tslib
    • 12kB/4kB
  • @swc/helpers
    • 23kB/6kB + tslib
tsconfig.json
{
  "compilerOptions": {
    "importHelpers": true
  }
}
.swcrc
{
  "jsc": {
    "externalHelpers": true
  }
}
# 1041179 bytes -> 573325 bytes reduced 45.00%
find ./lib -type f -name "*.js" -exec stat -c %s {} + | awk '{total += $1} END {print total " bytes"}'

prefix​

var require, __filename, __dirname;
{
  const { createRequire } = await import('node:module');
  require ||= createRequire(import.meta.url);
}
{
  const { fileURLToPath } = await import('node:url');
  const { dirname } = await import('node:path');
  __filename ||= fileURLToPath(import.meta.url);
  __dirname ||= dirname(__filename);
}
const __dirname = path.dirname(import.meta.url).replace('file://', '');

import type​

import file from './file.txt?raw' with { type: 'text' }
import file from './file.md?raw' with { type: 'text' }