replace方法js

JavaScript中的replace()方法用于替换字符串中的文本。该方法接受两个参数：要替换的文本和替换的文本。

例如，要将字符串中的所有"apple"替换为"orange"，可以使用以下代码：

let str = "I have an apple. My friend also has an apple.";
let newStr = str.replace("apple", "orange");
console.log(newStr); // 输出: "I have an orange. My friend also has an apple."

如果要替换所有出现的"apple"，则可以使用正则表达式：

let str = "I have an apple. My friend also has an apple.";
let newStr = str.replace(/apple/g, "orange");
console.log(newStr); // 输出: "I have an orange. My friend also has an orange."

在这个例子中，/apple/g表示全局替换，即替换所有出现的"apple"。