JS 字符串转数组

方法一:

　

　var s = '1231231';
　var arr = [];
　for (a = 0; a < s.length; a++) {
    　arr.push(parseInt(s[a]))
　}
　console.log(arr)

 

 

方法二:

      

var s = '1231231';
var b = [];
for (a = 0; a < s.length; a++) {
  b.push(s[a])
}
var arr = b.map(Number)
console.log(arr) //[1, 2, 3, 1, 2, 3, 1]

 

 

方法三(最简化):

var s = '1231231';
var arr = s.split('').map(Number);
console.log(arr) //[1, 2, 3, 1, 2, 3, 1]

方法四(Vue):

let str = '132131';
let str1 = Array.from(str);
let arr = [];
str1.forEach(function(item, index, str1) {
arr.push(item * 1)  //隐式转换
   return arr;
})
console.log(arr);