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[assert] element.insertBefore

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This commit is contained in:
Witold Filipczyk 2024-04-12 20:49:57 +02:00
parent 84ce531210
commit 86b767864b
1 changed files with 33 additions and 0 deletions
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test/ecmascript/assert/element.insertBefore.html Normal file
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<!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(0);
</script>
</body>
</html>