js replace的用法

str.replace(searchValue, replaceValue);

let str = "Hello, world!";
let newStr = str.replace("world", "JavaScript");
console.log(newStr); // 输出: "Hello, JavaScript!"

let str = "apple orange apple banana";
let newStr = str.replace(/apple/g, "pear");
console.log(newStr); // 输出: "pear orange pear banana"

let str = "1 2 3 4 5";
let newStr = str.replace(/\d+/g, function(match) {
    return parseInt(match) * 2;
});
console.log(newStr); // 输出: "2 4 6 8 10"

let str = "apple apple apple";
let newStr = str.replace(/apple/g, "pear");
console.log(newStr); // 输出: "pear pear pear"

let str = "John Doe, 30 years old";
let newStr = str.replace(/(\w+) (\w+), (\d+) years old/, "$2, $1, $3 yo");
console.log(newStr); // 输出: "Doe, John, 30 yo"