显示引文功能手册

Posted 2021-02-24

JS function that add a link included in the cite attribute of the blackquote html element as sup element close to the blackquote. Takes no argument.

From book Dom Scripting by Jeremy Keith.

function displayCitations() {
	var quotes = document.getElementsByTagName("blockquote");
	for (var i=0; i<quotes.length; i++) {
		if (!quotes[i].getAttribute("cite")) continue;
		var url = quotes[i].getAttribute("cite");
		var quoteChildren = quotes[i].getElementsByTagName("*");
		var quoteChildren = quotes[i].getElementsByTagName('*');
		if (quoteChildren.length < 1) continue;
		var elem = quoteChildren[quoteChildren.length - 1];
		var link = document.createElement("a");
		var link_text = document.createTextNode("source");
		link.appendChild(link_text);
		link.setAttribute("href",url);
		var superscript = document.createElement("sup");
		superscript.appendChild(link);	
		elem.appendChild(superscript);
	}
}