Concatenating several Links for printing

multilinkloader

let tipUrlList = Array();
let index = 0;
let htmlContent;

document.querySelectorAll("pre a").forEach(function(e){
	tipUrlList.push(e.href);	
});


function loadPage(){
	let xhr = new XMLHttpRequest();

	xhr.onload = function(data){
		console.log('d:on'+index)
		htmlContent += (this.responseText);
		if(index==tipUrlList.length)
		{
			console.log('d:c')
			document.body.innerhtml = htmlContent;
		}else{
			console.log('d:l')
			loadPage(index++)
		}
	}

	xhr.open('get',tipUrlList[index]);

	xhr.send()
}

loadPage()