@web3r/flowerkit
Version:
Tree-shakable JavaScript and TypeScript utility library for frontend/browser apps: DOM, events, arrays, objects, strings, date, JSON, and network helpers (ESM/CJS, SSR-friendly).
13 lines (12 loc) • 511 B
JavaScript
/**
* Checks if a function is async
* @param {*} fn source function
* @returns {boolean}
* @example
* // How to check if function is async?
* const fn = async () => {};
* const isAsync = isFnAsync(fn);
* console.log(isAsync); // => true
*/
const isFnAsync=fn=>{if(typeof fn==="function"){const string=fn.toString().trim();return/^async\s+/.test(string)||/return _ref[^.]*\.apply/.test(string)||fn?.constructor?.name==="AsyncFunction"}return false};export{isFnAsync};
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