正则表达式在js中的应用示例详解

const regex = /hello/;
console.log(regex.test("hello world")); // true
console.log(regex.test("Hi there!"));    // false

const regex = /quick/;
const result = regex.exec("The quick brown fox");
console.log(result); // ["quick", index: 4, input: "The quick brown fox", groups: undefined]

const str = "The quick brown fox jumps over the lazy dog.";
const words = str.match(/\b\w+\b/g);
console.log(words); // ["The", "quick", "brown", "fox", "jumps", "over", "the", "lazy", "dog"]

const str = "The quick brown fox jumps over the lazy dog.";
const newStr = str.replace(/fox/, 'cat');
console.log(newStr); // "The quick brown cat jumps over the lazy dog."

const str = "The quick brown fox jumps over the lazy dog.";
const index = str.search(/brown/);
console.log(index); // 10

const str = "apple, banana; orange|grape";
const fruits = str.split(/[,;|]/);
console.log(fruits); // ["apple", " banana", " orange", "grape"]

function validateEmail(email) {
    const regex = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
    return regex.test(email);
}
console.log(validateEmail("test@example.com")); // true
console.log(validateEmail("invalid-email"));     // false

function validatePhoneNumber(phone) {
    const regex = /^\d{3}-\d{3}-\d{4}$/; // 格式: 123-456-7890
    return regex.test(phone);
}
console.log(validatePhoneNumber("123-456-7890")); // true
console.log(validatePhoneNumber("1234567890"));   // false