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javascript - 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. 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?

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I did something similar in a question earlier today using regexes:

str = str.replace(/<title>[sS]*?</title>/, '<title>' + newTitle + '</title>');

That should find and replace it. [sS]*? 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>.


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