How to find and replace text in between two tags in HTML or XML document using jQuery?
Question
I want to find and replace text in a HTML document between, say inside the <title> tags. For example,
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:
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? Regex or may be using replaceWith() or something similar?
3 answers
solution1
18 ACCPTED 2013-12-26 04:57:44
I did something similar in a question earlier today using regexes:
str = str.replace(/<title>[\s\S]*?<\/title>/, '<title>' + newTitle + '<\/title>');
That should find and replace it. [\\s\\S]*? means [any character including space and line breaks]any number of times, and the ? makes the asterisk "not greedy," so it will stop (more quickly) when it finds </title> .
solution2
2 2013-12-26 05:17:22
You can also do something like this:
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/
solution3
1 2013-12-26 04:59:47
This would be a wonderful time to use Javascript's stristr(haystack, needle, bool) method. First, you need to get the head of the document using $('head') , then get the contents using .innerHTML .
For the sake of the answer, let's store $('head').innerHTML in a var called head . 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. Now, the final line is simple:
head.innerHTML = before + "<title>" + newTitle + after;
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