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DavidWells/getFunctionArgsByName.js

Last active May 30, 2020 02:09
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getFunctionArgsByName will return the argument key names. Careful using with minification
Raw
getFunctionArgsByName.js
function getFunctionArgsByName(func) {
return (func + '')
.replace(/[/][/].*$/mg,'') // strip single-line comments
.replace(/\s+/g, '') // strip white space
.replace(/[/][*][^/*]*[*][/]/g, '') // strip multi-line comments
.split('){', 1)[0].replace(/^[^(]*[(]/, '') // extract the parameters
.replace(/=[^,]+/g, '') // strip any ES6 defaults
.split(',').filter(Boolean); // split & filter [""]
}
function xyz(lol, hi, cool) {
// stuff
}
const theArgs = getFunctionArgsByName(xyz)
// ['lol', 'hi', 'cool']
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