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elinks/test/ecmascript/assert/element.insertBefore.html
2024-06-01 13:30:03 +02:00

34 lines
963 B
HTML

<!DOCTYPE html>
<html>
<body>
<ul id="myList">
<li>Coffee</li>
<li>Tea</li>
</ul>
<p>Click the button to insert an item to the list.</p>
<button onclick="myFunction()">Try it</button>
<p><strong>Example explained:</strong><br>First create a LI node,<br> then create a Text node,<br> then append the Text node to the LI node.<br>Finally insert the LI node before the first child node in the list.</p>
<script>
function myFunction() {
var newItem = document.createElement("LI");
var textnode = document.createTextNode("Water");
newItem.appendChild(textnode);
var list = document.getElementById("myList");
list.insertBefore(newItem, list.firstChild);
var result = document.getElementsByTagName("UL")[0].outerHTML;
console.assert(result === '<ul id="myList"><li>Water</li>\n <li>Coffee</li>\n <li>Tea</li>\n</ul>', 'Water, Coffee, Tea');
}
console.error('element.insertBefore.html');
myFunction();
console.exit();
</script>
</body>
</html>