Compare html responses using node js

I have a case where I send a request to a server and record the response. Then I craft the request and send it to server one more time and compare the response with the earlier recorded response.

I am using node.js and I want to know is there any best routine to compare HTML response in node.js which can directly point me the differences in both HTML responses.

Take a look at jsdiff, it can return to you the differences between two pieces of text, or HTML in your case, at a few different levels (chars, words, lines).

You can use a combination of jsdom and dom-compare:

var compare = require('dom-compare').compare,
    jsdom = require('jsdom');

// Those are the HTML fragments that we want to compare:
var expectedHTML = '<div><i>m</i><b>q</b></div>';
var actualHTML = '<div><i>h</div>';

var expectedDOM = jsdom.jsdom(expectedHTML);
var actualDOM = jsdom.jsdom(actualHTML);
var result = compare(expectedDOM, actualDOM);

console.log('diff array:', result.getDifferences());

// we can use a reporter to pretty-print the result:
var reporter = require('dom-compare').GroupingReporter;
console.log(reporter.report(result));