gm-polyfill

Typed wrappers and fallbacks for common userscript APIs.

Install

npm install @arylo-scripts/gm-polyfill

Usage

import {
  GM_addStyle,
  GM_getValue,
  GM_setValue,
  GM_xmlhttpRequestAsync,
} from '@arylo-scripts/gm-polyfill'

GM_addStyle('body { color: red; }')

const theme = GM_getValue('theme', 'light')
GM_setValue('theme', 'dark')

const response = await GM_xmlhttpRequestAsync({
  method: 'GET',
  url: 'https://example.com/api',
})

GM_addStyle falls back to inserting a <style> element when the userscript runtime does not provide window.GM_addStyle.

API

• GM_addStyle(cssContent)
• GM_getResourceText(name)
• GM_getValue(key, defaultValue)
• GM_setClipboard(content, type, callback)
• GM_setValue(key, value)
• GM_xmlhttpRequest(details)
• GM_xmlhttpRequestAsync(details)

Development

npm install
npm run lint
npm run build