const info = {
[Symbol('a')]: 'b'
}
console.log(info)
console.log(Object.keys(info))
image.png
Obeject. keys无法遍历symbol类型的属性
class Person {
constructor() {
this.name = "Lydia"
}
}
Person = class AnotherPerson {
constructor() {
this.name = "Sarah"
}
}
const member = new Person()
console.log(member.name)
image.png
function nums(a, b) {
if
(a > b)
console.log('a is bigger')
else
console.log('b is bigger')
return
a + b
}
console.log(nums(4, 2))
console.log(nums(1, 2))
image.png
B return 不能换行，不然return undefined
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