CountBitBuckerPrLines.js

var elements = document.getElementsByClassName('lines-added');

var sumForAdded = 0;

for (var i=0; i<elements.length; i++) {
	var innerText = elements[i].innerText;
	// console.log("Sth2"+innerText)
	var clearInnerText = innerText.replace('+', '').replace('-', '');
	sumForAdded += +clearInnerText;
}

var elements = document.getElementsByClassName('lines-removed');

var sumForRemoved = 0;

for (var i=0; i<elements.length; i++) {
	var innerText = elements[i].innerText;
	// console.log("Sth2"+innerText)
	var clearInnerText = innerText.replace('+', '').replace('-', '');
	 sumForRemoved += +clearInnerText;
}

console.log("Added lines: " + sumForAdded);

console.log("Removed lines: " + sumForRemoved);