编辑代码

/*字符串转数组删除指定下标再转成字符串*/
let a = '1,2,3,4,5,6'

let b = a.split(',')

b.splice(2,1)

b.join()

console.log(b)


/*字符串转数组删除指定下标再转成字符串*/
let a1 = '1,2,3,4,5,6'

let b1 = a1.split(',')

for (let i = 0; i < b1.length; i++) {
    console.log(b1[i])
    if (b1[i] === '2') {
        b1.splice(i, 1);
    }
}

let c1 = b1.toString()
console.log(c1)