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Function - JavaScript | MDN

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Function

*

20157

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Function JavaScript Function

Function(): Function eval() eval() Function

Function.prototype Function

Function.prototype.arguments: arguments TypeError arguments
Function.prototype.caller: caller TypeError
Function.prototype.constructor: Function Function

Function

displayName
length
name
prototype: function new

Function.prototype.apply(): this
Function.prototype.bind(): this
Function.prototype.call(): this
Function.prototype.toString(): Object.prototype.toString
Function.prototype[Symbol.hasInstance](): instanceof

Function

Function Function eval()

js

//  `var` 
var x = 10;

function createFunction1() {
  const x = 20;
  return new Function("return x;"); //  `x`  `x`
}

function createFunction2() {
  const x = 20;
  function f() {
    return x; //  `x`  `x`
  }
  return f;
}

const f1 = createFunction1();
console.log(f1()); // 10
const f2 = createFunction2();
console.log(f2()); // 20

Node.js f1() x ReferenceError Node x


ECMAScript 2027 LanguageSpecification # sec-function-objects

MDN

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