[英]How to find and replace text in between two tags in HTML or XML document using jQuery?
I want to find and replace text in a HTML document between, say inside the <title> tags. 我想在HTML文档中查找和替换文本,例如在<title>标记内。 For example,
例如,
var str = "<html><head><title>Just a title</title></head><body>Do nothing</body></html>";
var newTitle = "Updated title information";
I tried using parseXML() in jQuery (example below), but it is not working: 我尝试在jQuery中使用parseXML()(下面的示例),但是它不起作用:
var doc= $($.parseXML(str));
doc.find('title').text(newTitle);
str=doc.text();
Is there a different way to find and replace text inside HTML tags? 有没有其他方法可以查找和替换HTML标签内的文本? Regex or may be using replaceWith() or something similar?
正则表达式或正在使用replaceWith()或类似的东西?
I did something similar in a question earlier today using regexes: 我在今天早些时候使用正则表达式做了一个类似的事情:
str = str.replace(/<title>[\s\S]*?<\/title>/, '<title>' + newTitle + '<\/title>');
That should find and replace it. 那应该找到并替换它。
[\\s\\S]*?
means [any character including space and line breaks]any number of times, and the ? 表示[任意字符,包括空格和换行符]任意次,并且? makes the asterisk "not greedy," so it will stop (more quickly) when it finds
</title>
. 使星号“不是贪婪的”,因此找到
</title>
时它将停止(更快)。
You can also do something like this: 您还可以执行以下操作:
var doc = $($.parseXML(str));
doc.find('title').text(newTitle);
// get your new data back to a string
str = (new XMLSerializer()).serializeToString(doc[0]);
Here is a fiddle: http://jsfiddle.net/Z89dL/1/ 这是一个小提琴: http : //jsfiddle.net/Z89dL/1/
This would be a wonderful time to use Javascript's stristr(haystack, needle, bool)
method. 这将是使用Java的
stristr(haystack, needle, bool)
方法的绝佳时机。 First, you need to get the head of the document using $('head')
, then get the contents using .innerHTML
. 首先,您需要使用
$('head')
获取文档的.innerHTML
,然后使用.innerHTML
获取内容。
For the sake of the answer, let's store $('head').innerHTML
in a var
called head
. 为了得到答案,让我们将
$('head').innerHTML
在名为head
的var
。 First, let's get everything before the title with stristr(head, '<title>', true)
, and what's after the title with stristr(head, '</title>')
and store them in var
s called before
and after
, respectively. 首先,让我们使用
stristr(head, '<title>', true)
获取标题之前的所有内容,并使用stristr(head, '</title>')
after
,并将它们存储在var
before
和after
s中,分别。 Now, the final line is simple: 现在,最后一行很简单:
head.innerHTML = before + "<title>" + newTitle + after;
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