Using $('html').html() I can get the HTML within the <html> tag (<head>, <body>, etc.). But how can I get the actual HTML of the <html> tag (with attributes)?
Alternatively, is it possible to get the entire HTML of the page (including doctype, <html>, etc.) with jQuery (or plain old JavaScript)?
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This is how to get the html DOM element purely with JS:
var htmlElement = document.getElementsByTagName("html")[0];
or
var htmlElement = document.querySelector("html");
And if you want to use jQuery to get attributes from it...
$(htmlElement).attr(INSERT-ATTRIBUTE-NAME);
In addition to some of the other answers, you could also access the HTML element via:
var htmlEl = document.body.parentNode;
Then you could get the inner HTML content:
var inner = htmlEl.innerHTML;
Doing so this way seems to be marginally faster. If you are just obtaining the HTML element, however, document.body.parentNode seems to be quite a bit faster.
After you have the HTML element, you can mess with the attributes with the getAttribute and setAttribute methods.
For the DOCTYPE, you could use document.doctype, which was elaborated upon in this question.
In jQuery:
var html_string = $('html').outerHTML()
In plain Javascript:
var html_string = document.documentElement.outerHTML
if you want to get an attribute of an HTML element with jQuery you can use .attr();
so $('html').attr('someAttribute'); will give you the value of someAttribute of the element html
there is a jQuery plugin here: http://plugins.jquery.com/project/getAttributes
that allows you to get all attributes from an HTML element
Source: Stackoverflow.com