uncut

Uncut is a Node.js package that provides tools for getting the original implementation of overridden JavaScript native functions.

Installation

You can install Original Implementation using npm:

npm install uncut

Usage

Original Implementation provides the following functions:

isFunction

Check whether the provided argument is a function.

const { isFunction } = require('uncut');

console.log(isFunction(() => {})); // true
console.log(isFunction('not a function')); // false

isNativeFunction

Check whether the provided function is a native function that has not been overridden.

const { isNativeFunction } = require('uncut');

console.log(isNativeFunction(Array.prototype.map)); // true
console.log(isNativeFunction(() => {})); // false

isNativeObject

Check whether the provided object is a native object that has not been overridden.

const { isNativeObject } = require('uncut');

console.log(isNativeObject(Array)); // true
console.log(isNativeObject({})); // false

getOriginalFunction

Get the original implementation of a function that has been overridden.

const { getOriginalFunction } = require('uncut');

const originalMap = getOriginalFunction(Array.prototype.map);
const result = originalMap.call([1, 2, 3], x => x * 2);
console.log(result); // [2, 4, 6]

getOriginalFunctionFromString

Get the original implementation of a function by providing the function name as a string.

const { getOriginalFunctionFromString } = require('uncut');

const originalElementFromPoint = getOriginalFunctionFromString('Document.prototype.elementFromPoint');
const result = originalElementFromPoint.call(document, 10, 10);
console.log(result); // the element at (10, 10)

getOriginalProtypeMethod

Get the original implementation of a prototype method by passing the object and function name.

const { getOriginalProtypeMethod } = require('uncut');

const originalElementFromPoint = getOriginalProtypeMethod(Document, 'elementFromPoint');
const result = originalElementFromPoint.call(document, 10, 10);
console.log(result); // the element at (10, 10)

Contributing

If you find a bug or have an idea for a new feature, please open an issue or submit a pull request on GitHub.