javascript 字符串替换语句

Question

我的聊天框有这种情况，我想绕过内置应用程序中的字符串并将其替换为特定短语。

<div id="testdiv">
This is an example of a sentence that i want to replace.
</div>

我想替换以下内容:

• “这是一个例子”和“我替换了”
• “我想替换”为“使用 javascript”

“句”字应保留，不受影响。

所以输出将是:I replaced the sentence using javascript

我使用了我的这段代码，2 个函数并且它正在工作，但我正在寻找某人的帮助来清理我的代码或其他方法，如 split 或 concat 如果适用的？如果可能的话，将它放在具有相同想法的 1 个函数上。

function replace1 () {
      var str1 = document.getElementById("testdiv").innerHTML;
      var ptrn1 = /This is an example of a/gi;
      var rep1 = "This is an example of a";
      var newstr1 = rep1.replace(ptrn1, "that i want to replace");
      document.getElementById("testdiv").innerHTML = newstr1;
  }

  function replace2 () {
      var str2 = document.getElementById("testdiv").innerHTML;
      var ptrn2 = /that i want to replace/gi;
      var rep2 = "that i want to replace";
      var newstr2 = rep1.replace(ptrn2, "using javascript");
      document.getElementById("testdiv").innerHTML = newstr2;
  }   

Answer 1

function replace1 () {
  var str1 = document.getElementById("testdiv").innerText;
  var ptrn1 = /This is an example of a/gi;
  var ptrn2 = /that i want to replace/gi;
  var str2 = str1.replace(ptrn1, "I replaced the").replace(ptrn2, "using javascript");
  document.getElementById("testdiv").innerHTML = str2;
}
      
replace1()

<div id="testdiv">
This is an example of a sentence that i want to replace.
</div>