// 原始字符串
var originalString = "Hello, World!";

// 替换字符并创建新变量
var newString = originalString.replace("World", "jQuery");

// 删除字符 (替换为空字符串)
var stringWithoutComma = originalString.replace(",", "");

console.log(newString); // 输出: "Hello, jQuery!"
console.log(stringWithoutComma); // 输出: "Hello World!"

var text = "jQuery is awesome! 123";

// 删除所有数字
var noNumbers = text.replace(/\d+/g, "");

// 替换多个空格为单个空格
var cleanText = text.replace(/\s+/g, " ");

console.log(noNumbers); // 输出: "jQuery is awesome! "
console.log(cleanText); // 输出: "jQuery is awesome! 123"

// 获取元素文本，处理后保存为新变量
var originalText = $("#myElement").text();
var processedText = originalText.replace("old", "new");

// 或者直接链式操作
var newText = $("#myElement").text().replace("old", "new");

// 获取输入值并处理
var userInput = $("#inputField").val();
var sanitizedInput = userInput.replace(/</g, "&lt;").replace(/>/g, "&gt;");

var text = "jQuery is great but sometimes verbose";

// 多个替换操作
var newText = text
  .replace("great", "awesome")
  .replace("verbose", "concise")
  .toUpperCase();

console.log(newText); // 输出: "JQUERY IS AWESOME BUT SOMETIMES CONCISE"

var str = "jQuery 3.6.0 released in 2021";

var newStr = str.replace(/\d+/g, function(match) {
  return parseInt(match) + 1;
});

console.log(newStr); // 输出: "jQuery 4.7.1 released in 2022"