特别是关于“我能否完全依赖 jquery html() 方法,它会像 innerHTML 一样执行”我的答案是否定的!
在 Internet Explorer 7 或 8 中运行它,您会看到。
当设置包含嵌套在 <P> 标记中的 <FORM> 标记的 HTML 时,jQuery 会产生错误的 HTML,其中字符串的开头是换行符!
这里有几个测试用例,运行时的注释应该是不言自明的。这很晦涩,但不明白发生了什么有点令人不安。我要提交错误报告。
<html>
<head>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js"></script>
<script>
$(function() {
// the following two blocks of HTML are identical except the P tag is outside the form in the first case
var html1 = "<p><form id='form1'><input type='text' name='field1' value='111' /><div class='foo' /><input type='text' name='field2' value='222' /></form></p>";
var html2 = "<form id='form1'><p><input type='text' name='field1' value='111' /><div class='foo' /><input type='text' name='field2' value='222' /></p></form>";
// <FORM> tag nested within <P>
RunTest("<FORM> tag nested within <P> tag", html1); // succeeds in Internet Explorer
RunTest("<FORM> tag nested within <P> tag with leading newline", "\n" + html1); // fails with added new line in Internet Explorer
// <P> tag nested within <HTML>
RunTest("<P> tag nested within <FORM> tag", html2); // succeeds in Internet Explorer
RunTest("<P> tag nested within <FORM> tag with leading newline", "\n" + html2); // succeeds in Internet Explorer even with \n
});
function RunTest(testName, html) {
// run with jQuery
$("#placeholder").html(html);
var jqueryDOM = $('#placeholder').html();
var jqueryFormSerialize = $("#placeholder form").serialize();
// run with innerHTML
$("#placeholder")[0].innerHTML = html;
var innerHTMLDOM = $('#placeholder').html();
var innerHTMLFormSerialize = $("#placeholder form").serialize();
var expectedSerializedValue = "field1=111&field2=222";
alert( 'TEST NAME: ' + testName + '\n\n' +
'The HTML :\n"' + html + '"\n\n' +
'looks like this in the DOM when assigned with jQuery.html() :\n"' + jqueryDOM + '"\n\n' +
'and looks like this in the DOM when assigned with innerHTML :\n"' + innerHTMLDOM + '"\n\n' +
'We expect the form to serialize with jQuery.serialize() to be "' + expectedSerializedValue + '"\n\n' +
'When using jQuery to initially set the DOM the serialized value is :\n"' + jqueryFormSerialize + '\n' +
'When using innerHTML to initially set the DOM the serialized value is :\n"' + innerHTMLFormSerialize + '\n\n' +
'jQuery test : ' + (jqueryFormSerialize == expectedSerializedValue ? "SUCCEEDED" : "FAILED") + '\n' +
'InnerHTML test : ' + (innerHTMLFormSerialize == expectedSerializedValue ? "SUCCEEDED" : "FAILED")
);
}
</script>
</head>
<div id="placeholder">
This is #placeholder text will
</div>
</html>