ES6

String

charAt()
includes(v,i)
startsWith(v,i)
endsWith(v,i)
repeat()
padStart(num,str)
padEnd(num,str)
${}
fn``:标签模板
raw()

Number

isFinite()
isNaN()
parseInt()
parseFloat()
isIneger()
EPSILON
isSafeInteger()
**:指数运算符

Function

rest参数：...values
尾调用优化

Array

扩展运算符: ...

• 可以clone数组
• 可以Str转Arr
• arrLike(Iterator)转Arr

from(al,fn)
of()
copyWithin(target,start,end)
find(fn(v,i,arr),this)
findIndex(fn(v,i,arr),this)
fill(v,start,end) entries()
keys()
values()
includes(v,i)
some(fn)

Object

is(value1,value2)
assign(target, source1, source2)
super.[xxx] 引用原型对象的属性
entries()
keys()
values()

Set

new Set()
add(value)
delete(value)
has(value)
clear()
.size
keys()
values()
entries()
forEach(fn(v,key),this)

Map

new Map(arr) .set(key,value)
.get(key)
.has(key)
.delete(key)
.clear()
.size

Promise

Promise.prototype.then()
Promise.prototype.catch()
Promise.all()
Promise.race()