ES6 基础

code/ES6/src/06_symbols/01_assign.js

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+function getPerson(name, age) {
+	return {
+		name,
+		age,
+		[Symbol("createTime")]: Date.now()
+	}
+}
+
+let person = getPerson("heibaiying", 10);
+let symbols = Object.getOwnPropertySymbols(person);
+person[symbols[0]] = 1000;
+console.log(person[symbols[0]]);

code/ES6/src/06_symbols/01_symbols.js

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+let mySymbol = Symbol();
+
+// 第一种写法
+let a1 = {};
+a1[mySymbol] = 'Hello!';
+
+// 第二种写法
+let a2 = {
+	[mySymbol]: 'Hello!'
+};
+
+// 第三种写法
+let a3 = {};
+Object.defineProperty(a3, mySymbol, {value: 'Hello!'});
+
+// 错误的写法
+let a4 = {};
+a4.mySymbol = "hello!";
+
+
+console.log(a1[mySymbol]);  // "Hello!"
+console.log(a2[mySymbol]);  // "Hello!"
+console.log(a3[mySymbol]);  // "Hello!"
+console.log(a4[mySymbol]);  // "undefined"
+
+let symbol01 = Symbol();
+let symbol02 = Symbol();
+console.log(symbol01 === symbol02);
+let symbol03 = Symbol("name");
+let symbol04 = Symbol("name");
+console.log(symbol03 === symbol04);
+
+let symbol05 = Symbol.for("age");
+let symbol06 = Symbol.for("age");
+console.log(symbol05 === symbol06);  //true
+console.log(symbol05);  // Symbol(age)
+
+