JavaScript mins and seconds into seconds

var str = "4m 26s";
var arr = str.split(" ");
var sec = parseInt(arr[0], 10)*60 + parseInt(arr[1], 10);

You don't need regex if you use parseInt...

Simple regex will work:

var s = '21m 06s';

var m = /(\d{1,2})m\s(\d{1,2})s/.exec(s);

var mins = parseInt(m[1], 10);
var secs = parseInt(m[2], 10);

A non-regex way:

做一个 string.split(" ") on your string; then do string.slice(0, -1) on both arrays. Multiply the first entry by 60. Add them together.

var str = "4m 26s";
console.log(str.match(/\d+m\s+(\d+)s/)[1]);//26