bind.md

title	tags	author_title	author_url	author_image_url	description	image
bind	function,object,intermediate	Deepak Vishwakarma	https://github.com/deepakshrma	https://avatars2.githubusercontent.com/u/7682731?s=400	Implementation of "bind" in typescript, javascript and deno.	https://www.positronx.io/wp-content/uploads/2018/11/positronx-banner-1152-1.jpg

Creates a function that invokes fn with a given context, optionally adding any additional supplied parameters to the beginning of the arguments.

Return a function that uses Function.prototype.apply() to apply the given context to fn. Use Array.prototype.concat() to prepend any additional supplied parameters to the arguments.

export const bind = <T = any>(
  fn: (...args: any[]) => any,
  context: T,
  ...boundArgs: any[]
) => (...args: any[]) => fn.apply(context, [...boundArgs, ...args]);

TS: You need to bind this type

const freddy = { user: "fred" };
function greet(this: typeof freddy, greeting: string, punctuation: string) {
  return greeting + " " + this.user + punctuation;
}
const freddyBound = bind(greet, freddy);
console.log(freddyBound("hi", "!")); // 'hi fred!'

JS Version:

function greet(greeting, punctuation) {
  return greeting + " " + this.user + punctuation;
}
const freddy = { user: "fred" };
const freddyBound = bind(greet, freddy);
console.log(freddyBound("hi", "!")); // 'hi fred!'