javascript - 尝试删除字符串中的一些字母

Question

let myDate = new Date();
myDate.toLocaleString;

因此，如果我控制台记录 myDate 的值将是:

Wed Oct 16 2019 15:57:22 GMT+0300 (Israel Daylight Time)

如果我希望该值仅为 57:22 怎么办？ (一小时中的分钟和秒)。我该怎么做？

Answer 1

试试这个

const getMMSS = (str) => str.match(/:\d{2}:\d{2}/)[0].slice(1); 

// tests
const myDate = new Date(2019,09,16,23,59,59,999);
let dateStr =  myDate.toLocaleString();
console.log(getMMSS(dateStr))
dateStr =  "Wed Oct 16 2019 15:57:22 GMT+0300 (Israel Daylight Time)"
console.log(getMMSS(dateStr))

或者只是

const pad = (num) => ("0"+num).slice(-2);
const myDate = new Date();
console.log(`${pad(myDate.getMinutes())}:${pad(myDate.getSeconds())}`)