XML Applications

This chapter demonstrates some HTML applications using XML, HTTP, DOM, and JavaScript.

The XML Document Used

In this chapter we will use the XML file called"cd_catalog.xml".

Display XML Data in an HTML Table

This example loops through each <CD> element, and displays the values of the <ARTIST> and the <TITLE> elements in an HTML table:

Example

<table id="demo"></table>

<script>
function loadXMLDoc() {
const xhttp = new XMLHttpRequest();
xhttp.onload = function() {
    const xmlDoc = xhttp.responseXML;
    const cd = xmlDoc.getElementsByTagName("CD");
    myFunction(cd);
  }
xhttp.open("GET", "cd_catalog.xml");
xhttp.send();
}

function myFunction(cd) {
let table="<tr><th>Artist</th><th>Title</th></tr>";
for (let i = 0; i < cd.length; i++) {
    table += "<tr><td>" +
    cd[i].getElementsByTagName("ARTIST")[0].childNodes[0].nodeValue +
    "</td><td>" +
    cd[i].getElementsByTagName("TITLE")[0].childNodes[0].nodeValue +
    "</td></tr>";
}
document.getElementById("demo").innerHTML = table;
}
</script>

</body>
</html>

Try it Yourself »

For more information about using JavaScript and the XML DOM, go toDOM Intro.

Display the First CD in an HTML div Element

This example uses a function to display the first CD element in an HTML element with id="showCD":

Example

const xhttp = new XMLHttpRequest();
xhttp.onload = function() {
  const xmlDoc = xhttp.responseXML;
  const cd = xmlDoc.getElementsByTagName("CD");
  myFunction(cd, 0);
}
xhttp.open("GET", "cd_catalog.xml");
xhttp.send();

function myFunction(cd, i) {
document.getElementById("showCD").innerHTML =
"Artist: " +
cd[i].getElementsByTagName("ARTIST")[0].childNodes[0].nodeValue +
"<br>Title: " +
cd[i].getElementsByTagName("TITLE")[0].childNodes[0].nodeValue +
  "<br>Year: " +
cd[i].getElementsByTagName("YEAR")[0].childNodes[0].nodeValue;
}

Try it Yourself »

Navigate Between the CDs

To navigate between the CDs in the example above, create anext() andprevious() function:

Example

Try it Yourself »

Show Album Information When Clicking On a CD

The last example shows how you can show album information when the user clicks on a CD:

Example

function displayCD(i) {
document.getElementById("showCD").innerHTML =
"Artist: " +
cd[i].getElementsByTagName("ARTIST")[0].childNodes[0].nodeValue +
"<br>Title: " +
cd[i].getElementsByTagName("TITLE")[0].childNodes[0].nodeValue +
"<br>Year: " +
cd[i].getElementsByTagName("YEAR")[0].childNodes[0].nodeValue;
}

Try it Yourself »

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