Question

是我的语法正确我想替换模式abcd + abcd +中的字符串但是它在JavaScript中使用replace方法不起作用是代码快照评论的一剂不起作用我需要

function myFunction() {
  var str = document.getElementById("demo").innerText;
  //var res = str.replace(/+/g, "red");
  var res2 = str.replace("+", "red");
  document.getElementById("demo").innerText = res2;
}

<p>Click the button to replace "blue" with "red" in the paragraph below:</p>
<p id="demo">Mr + has a + house and a blue car.</p>
<button onclick="myFunction()">Try it</button>

Answer 1

注释掉的部分几乎是正确的，但你需要逃避+，因为它是正则表达式中的特殊字符：

function myFunction() {
  var str = document.getElementById("demo").textContent;
  var res = str.replace(/\+/g, "red");
  document.getElementById("demo").textContent= res;
}

<p>Click the button to replace "blue" with "red" in the paragraph below:</p>
<p id="demo">Mr + has a + house and a blue car.</p>
<button onclick="myFunction()">Try it</button>

innerText是IE推出的一种古怪的非标准属性。强烈建议改为使用标准，更快，更可靠的textContent - 请参阅http://perfectionkills.com/the-poor-misunderstood-innerText

为什么+不会被javascript字符串替换？

1 个答案: