如何将加号加 1 添加到由数字组成的字符串中

Question

场景：我有一些字符串需要将数值递增 1，而不会丢失字符串中的任何内容。

Example strings:

"000000" should equal to "000001"

"000100" should equal to "000101"

"000009" should equal to "000010"

我尝试了一些东西，从最后开始循环到每个字符，但在某些情况下是错误的。我认为可能有更好的方法来做到这一点。

Answer 1

padStart 可用于将字符填充到一定长度str="000000"console.log(`${+str+1}`.padStart(str.length,'0'))str="000000010"console.log(`${+str+1}`.padStart(str.length,'0'))

Answer 2

您可以使用padStart()https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padStart/*"000000" should equal to "000001""000100" should equal to "000101""000009" should equal to "000010"*/const a = "000000";const b = "000100";const c = "000009";console.log((Number(a)+1).toString().padStart(6,"0"));console.log((Number(b)+1).toString().padStart(6,"0"));console.log((Number(c)+1).toString().padStart(6,"0"));