function capitalizeAfterSpace(str) { return str .replace(/^\s+|\s+(?=\s)/g, "") .replace(/

const str = "123[abc]456{zzz}789[def]10"; // 包括括号 const reg1 = /\[(.+?)\]/g; // [] 中括号 console.log(

const str = "这里是内容(括号中的内容(haha),123)"; str.split(new RegExp("\\((.*)\\)")); // ["这里是内容", "括号中的内容(hah

const s = "021Abc99Abc9"; if (/(.{3,}).*\1/g.test(s)) { console.log(true); }

let s = "get-ele-by"; s.replace(/-\w/g, (w) => w.slice(1).toUpperCase()); // 'getEleBy'

const ThousandNum = (num) => num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ","); const money = T

const str = "asdfaadddqqq"; str.replace(/d/g, "-"); str.replaceAll("d", "-"); // 'as-faa---qqq'

let str = "a,b,c,d,"; str = str.replace(/,([^,]*)$/, "!"); // 'a,b,c,d!'

var reg = /^([\w+\.])+@\w+([.]\w+)+$/; // \w 等价于 [^A-Za-z0-9_] // /^([a-zA-Z0-9]+[_|\_|\.]?)*[a-zA-