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Formatting XML from XML String trouble with removing indent after XML-Tag closed

I have the following function, which takes a two xml strings as input and then compares them and creates a html output showing the differences marked in red.

function compareXml(xml1, xml2) {
    xml1 = formatXml(xml1);
    xml2 = formatXml(xml2);
    let html = "<table>";
    let lineNo = 0;
    let xml1Nodes = xml1.split("\n");
    let xml2Nodes = xml2.split("\n");

    for (let i = 0; i < Math.max(xml1Nodes.length, xml2Nodes.length); i++) {
        lineNo++;
        let xml1Line = xml1Nodes[i];
        let xml2Line = xml2Nodes[i];
        let xml1Node = xml1Line.replace(/</g, "&lt;").replace(/>/g, "&gt;");
        let xml2Node = xml2Line.replace(/</g, "&lt;").replace(/>/g, "&gt;");
        if (xml1Line !== xml2Line) {
            html += "<tr><td class='xml1' style='background-color:red'>" + "Zeile: " + lineNo + " " + xml1Node + "</td><td class='xml2' style='background-color:red'>" + "Zeile: " + lineNo + " " + xml2Node + "</td></tr>";
        } else {
            html += "<tr><td class='xml1'>" + "Zeile: " + lineNo + " " + xml1Node + "</td><td  class='xml2'>" + "Zeile: " + lineNo + " " + xml2Node + "</td></tr>";
        }
    }

    html += "</table>";
    return html;
}

the following function is called to format the xml correcly (indentation) but the problem is that the indentation won't get removed, when the xml tag gets closed.

function formatXml(xml) {
    let formatted = "";
    let indent = "";

    let nodes = xml.match(/(<[^\/][^>]*>|<\/[^>]+>|[^<]+)/g);

    nodes.forEach(function(node) {
        if (node.startsWith("<")) {
            formatted += indent + node;
            if (!node.endsWith("/>")) {
                if (nodes.length > nodes.indexOf(node) + 1 && nodes[nodes.indexOf(node) + 1].startsWith("<")) {
                    formatted += "\n";
                    indent += "&nbsp;&nbsp;";
                }
            }
        } else if (node.startsWith("</")) {
            indent = indent.substring(6);
            formatted += indent + node + "\n";
        } else {
            formatted += node;
        }
    });

    return formatted;
}

The return value of the compareXml Function then gets put into a IFrame where it should display the XML correctly formatted. I'm glad for any answers or inputs to point me in the right direction since JS is not my area :)

Thanks already!

I get the following output when printing it to the console:

<?xmlversion="1.0"encoding="utf-16"?>
&nbsp;&nbsp;<testxml>
&nbsp;&nbsp;&nbsp;&nbsp;<xml>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<title>TestXml&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</title>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</xml>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</testxml>

as you can see, the indentation won't get removed and only gets added further. I tried a lot of things by tweaking my code but I'm somehow not able to figure it out.

Via Active questions tagged javascript - Stack Overflow https://ift.tt/qpuJKsz
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