1. var f = function () {}
    3. // ES5 
    4. // console.log(f.name);// f
    6. // console.log(new Function().name) // anonymous
    7. // 
    10. // demo1
    11. function foo (){};
    13. foo.bind({});
    15. // console.log(foo.bind({}).name);  // bound foo
    17. // 对象简写
    18. const foo = "bar";
    20. const baz = {foo}; // => {foo:"bar"}
    22. // 函数中对象简写
    23. function foo (a, b){
    24.     console.log({a, b});
    25.     // let a = a, b = b;
    26. }
    27. foo(1,2);
    29. let foo = (a, b)=>({a,b});
    31. let age = '12'
    32. const person = {
    33.     age,
    34.     say(){
    35.         console.log(this.age); // es6写法
    36.     }
    37. }
    38. person.say();// 12
    41. /************************************************************************************/
    43. function foo(){
    44.     console.log('foo');
    45. }
    48. function bar(){
    49.     console.log('bar');
    50. }
    52. function baz(){
    53.     console.log('baz');
    54. }
    56. let a = 1;
    58. const obj = {
    59.     a,
    60.     foo,
    61.     bar,
    62.     baz
    63. }
    65. module.exports.obj = obj;
    66. /************************************************************************************/
    67. // 接收
    68. const {a,foo,bar,baz} = reuqire('./root.js');//上面代码的地址
    70. console.log(a,foo(),bar(),baz());
    73. var arr = [1,2,3,4,5,6,7,8];
    74. console.log(arr[1] === arr['1'])//true
    76. /************************************************************************************/
    78. let obj = {};
    79. obj.foo = true;
    80. obj['f'+'o'+'o'] = false;
    81. obj.foo === obj['f'+'o'+'o'] // true
    83. /************************************************************************************/
    85. let a = "hello" ;
    86. let b = "world" ;
    88. let obj = {
    89.     [a + b]: true,
    90.     ['hello'+b]: 123,
    91.     ['hello'+'world']: undefined
    92. }
    93. // 属性名会变成字符串
    94. /************************************************************************************/
    96. var myObj = {};
    97.         myObj[true] = 'foo';
    98.         myObj[3] ='bar';
    99.         myObj[myObj] ='baz';// {[object Object]:"baz"}
    101. const a = {a:1};
    102. const b = {b:1};
    103. const obj = {
    104.     [a]:"valueA",
    105.     [b]:"valueB"
    106. }
    107. console.log(obj)//{[object Object] :"valueB"};
    109. const person = {
    110.     sayName(){
    111.         console.log('hello');
    112.     }
    113. }
    115. console.log(person.sayName.name);// sayName
    117. // ES5 属性描述符
    119. let obj = {a: 2};
    120. console.log(Object.getOwnProperty(obj,"a"));
    121. /**
    122.  * configurable 可配置的
    123.  * enumerable 可枚举
    124.  * writable 可写
    125.  * value 值
    126.  */
    128. let language = {
    129.     set current(name){
    130.         this.log.push(name);
    131.     },
    132.     log:[]
    133. }
    135. language.current = "English";
    136. language.current = "Chinese";
    139. var obj = {
    140.     _b:0,
    141.     get a(){
    142.         return this._b;
    143.     }
    144.     set a(val){
    145.         this._b = val;
    146.     }
    147. }