javascript 没有括号表示法切片吗？ 即字符串[0:4]

Question

I have been trying to find an answer to this, searched 'bracket notation string' but could not find anything. Say I have:

let s = 'apple'

I know I can access any letter with s[x] but can you slice a string this way using javascript. Ie

s[0:3] 

to return "appl" ?

Answer 1

Use Array.prototype.slice() to obtain slices from an array:

let s = 'apple'

let mySlice = s.slice(0,4)
console.log(mySlice) // appl