作者:QQ文科 | 来源:互联网 | 2023-09-17 18:45
substrvarsabcdvarress.substr(0,s.length-1)从索引0开始,截取s.length-1个字符console.log(res)
substr
var s = 'abcd'
var res = s.substr(0,s.length-1)
console.log(res)
substring
var s = 'abcd'
var res = s.substring(0,s.length-1)
console.log(res)