JS中級Symbol資料型

▶▼Symbol資料型

  var newSymbol = Symbol('설명');

▼▼Symbolの利用先

  var person = {name : 'Kim'};
  person.weight = 100;

  var weight = Symbol('my weight');
  person[weight] = 200; 

  console.log(person); // { name: 'Kim', weight: 100, [Symbol(my weight)]: 200 }

  var newSymbol = Symbol('설명');

  var person = { name : "Kim", [height] : 160 };

▼▼Symbol資料型の特徴

var a = Symbol('script1');
var b = Symbol('script2');
console.log(a===b);//false

var a = Symbol.for('script1');
var b = Symbol.for('script2');
console.log(a===b);//true

▶️ Symbol.iterator()

var array = [2,3,4];
console.log(array[Symbol.iterator]);