Cobbled together some code examples to put together some functions that will retrieve text from a page (via AJAX) by selector

getPageData.js

(function(){

	// cobbled together some code examples to put together some functions
	// that will retrieve text from a page (via AJAX) by selector

	var url = 'http://www.cnn.com';
	var selector = 'h2';

	getPageData(url,selector);

	function parsePageData(html,selector){
	    var es = new DOMParser().parseFromString(html, 'text/html').querySelectorAll(selector);
		var textArray = [].slice.call(es).map(function(n){ return n.innerText.trim() });
		if(textArray.length){
			console.log('Data found!');
			console.log(textArray);
		}else{
			console.log('Sorry nothing found with that selector');
		}
	}

	function getPageData(url,selector){
		var request = new XMLHttpRequest();
		request.open('GET', url, true);

		request.onload = function() {
		  if (this.status >= 200 && this.status < 400) {
			console.log('Page Request Success!');
		    parsePageData(this.response,selector)
		  } else {
			console.log('We reached our target server, but it returned an error');
		  }
		};

		request.onerror = function() {
		  console.log('There was a connection error of some sort');
		};

		request.send();
	}

}());