js str_replace

str_replace(find, replace, string, count)

// 基本替换
let str = "Hello, world!";
let newStr = str.replace("world", "everyone");
console.log(newStr); // 输出: Hello, everyone!

// 替换所有匹配项
str = "apple, apple pie, apple juice";
newStr = str.replace(/apple/g, "orange");
console.log(newStr); // 输出: orange, orange pie, orange juice

// 使用函数进行替换
str = "The price is $100";
newStr = str.replace(/\$\d+/g, function(match) {
    return parseInt(match.replace("$", "")) * 2;
});
console.log(newStr); // 输出: The price is $200

let str = "apple, apple pie, apple juice";
let newStr = str.replace(/apple/g, "orange"); // 添加了全局标志 g
console.log(newStr); // 输出: orange, orange pie, orange juice

let str = "This is a test. Test it well.";
let search = "Test";
let replace = "Experiment";
let escapedSearch = search.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // 转义特殊字符
let newStr = str.replace(new RegExp(escapedSearch, 'g'), replace);
console.log(newStr); // 输出: This is a test. Experiment it well.