1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {
border: 1px solid black;
}
</style>
</head>
<body>
<div id="myDIV">
<p>I am a p element inside div, and I have a <span id="mySPAN"><b>span</b></span> element inside of me.</p>
</div>
<span id="mySPAN2"><b>span</b></span>
<p>Click the button to find out if the div element contains a span element.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var span = document.getElementById("mySPAN");
var span2 = document.getElementById("mySPAN2");
var div = document.getElementById("myDIV").contains(span);
var div2 = document.getElementById("myDIV").contains(span2);
var itself = document.getElementById("mySPAN").contains(span);
console.assert(div, 'myDIV contains mySPAN');
console.assert(!div2, '!myDIV contains mySPAN2');
console.assert(itself, 'element contains itself');
}
console.error('element.contains.html');
myFunction();
console.exit();
</script>
</body>
</html>
|
