正则 例子 js

const emailRegex = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
const email = "example@example.com";
console.log(emailRegex.test(email)); // 输出：true

const phoneRegex = /^1[3-9]\d{9}$/;
const phone = "13800138000";
console.log(phoneRegex.test(phone)); // 输出：true

const str = "Hello World! How are you?";
const newStr = str.replace(/\s+/g, " ");
console.log(newStr); // 输出："Hello World! How are you?"

const urlRegex = /^(https?:\/\/)?([\da-z.-]+)\.([a-z.]{2,6})([/\w .-]*)*\/?$/;
const url = "https://www.example.com";
console.log(urlRegex.test(url)); // 输出：true

const str = "The price is $100.50";
const numbers = str.match(/\d+(\.\d+)?/g);
console.log(numbers); // 输出：["100", "50"]