为什么jQuery的追加具有不一致的回车输出?

时间:2014-12-06 16:57:11

标签: javascript jquery

以下示例说明了问题:

$("#ex1").append("\r"); //This one works as expected
$("#ex2").append("\n"); //This also works as expected
$("#ex3").append("\r\n"); //This also works as expected
$("#ex4").append("\r <el></el>"); //This replaces \r with \n
$("#ex5").append("\r\n <el></el>"); //This removes \r completely

$("div").on("click", function() { 
    alert(JSON.stringify(this.innerHTML)); 
});
<!-- Note: this also works in the JQuery 2.0 branch -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
Click the divs below to see the result.
<div id="ex1">R: </div>
<div id="ex2">N: </div>
<div id="ex3">RN: </div>
<div id="ex4">R + El: </div>
<div id="ex5">RN + El: </div>

为什么jQuery的追加具有不一致的回车输出?

直接使用DOM,附加文本节点等,保留\r(至少在Chrome上,在Linux上):

document.getElementById("ex1").appendChild(document.createTextNode("\r"));

document.getElementById("ex2").appendChild(document.createTextNode("\n"));

document.getElementById("ex3").appendChild(document.createTextNode("\r\n"));

document.getElementById("ex4").appendChild(document.createTextNode("\r "));
document.getElementById("ex4").appendChild(document.createElement('el'));

document.getElementById("ex5").appendChild(document.createTextNode("\r\n "));
document.getElementById("ex5").appendChild(document.createElement('el'));

document.addEventListener("click", function(e) {
    if (/^ex\d$/.test(e.target.id)) {
        alert(JSON.stringify(e.target.innerHTML));
    }
}, false);
<!-- Note: this also works in the JQuery 2.0 branch -->
Click the divs below to see the result.
<div id="ex1">R: </div>
<div id="ex2">N: </div>
<div id="ex3">RN: </div>
<div id="ex4">R + El: </div>
<div id="ex5">RN + El: </div>

1 个答案:

答案 0 :(得分:0)

http://jsfiddle.net/19gc7pjt/3/

这不是jQuery的问题。

我认为这是与javascript相关的浏览器问题。

(IE使用'\ r',其他人使用'\ n'。我在Chrome上测试了btw ...)

您可以在警报窗口中看到完全相同的结果。 '\ r'被忽略。

$("#ex1").append("\r"); //This one works as expected
$("#ex2").append("\n"); //This also works as expected
$("#ex3").append("\r\n"); //This also works as expected
$("#ex4").append("\r <el></el>"); //This replaces \r with \n
$("#ex5").append("\r\n <el></el>"); //This removes \r completely

var text4 = "\r <el></el>";
var text5 = "\r\n <el></el>";

alert(text4);    //check this
alert(text5);    //and this

$("div").on("click", function () {
    alert(JSON.stringify(this.innerHTML));
});