function.call-x

Robustly caches Function.prototype.call for reliable usage across environments.

Installation

npm install function.call-x

Usage

const call = require('function.call-x');

function greet(name) {
  return `Hello, ${name}!`;
}

// Use call to invoke the function
const result = call.call(greet, null, 'World');
console.log(result); // "Hello, World!"

Why?

This module caches a reference to the native Function.prototype.call method. This is useful in scenarios where:

• You need to ensure you're using the original, unmodified call method
• Third-party code may have modified or overridden Function.prototype.call
• You want to protect against prototype pollution
• You're building low-level utility libraries that need guaranteed native behavior

API

The module exports the cached Function.prototype.call method directly.

call.call(func, thisArg, ...args)

• func: The function to invoke
• thisArg: The value to use as this when calling the function
• ...args: Individual arguments to pass to the function

Example

const call = require('function.call-x');

const obj = {
  value: 42,
  getValue: function(multiplier, offset) {
    return this.value * multiplier + offset;
  }
};

const result = call.call(obj.getValue, obj, 2, 10);
console.log(result); // 94

Additional Example

const call = require('function.call-x');

// Using with array methods
const array = [1, 2, 3, 4, 5];
const slice = call.bind(Array.prototype.slice);
const subset = slice(array, 1, 4);
console.log(subset); // [2, 3, 4]

// Using with string methods
const toUpperCase = call.bind(String.prototype.toUpperCase);
console.log(toUpperCase('hello')); // "HELLO"

License

MIT