I have a div, which contains n number of child nodes. I have a for loop:
for (iloop = 0; iloop < summaryDiv.childNodes.length; iloop++) {
if (summaryDiv.childNodes[iloop].innerHTML.contains('display:block')) {
flag = false;
}
}
Here some of the child nodes don't contain the element innerHTML. I need to check if the child node contains innerHTML element, then I need to check for the style (display:block). How can I do this?
You can check if the element has a property "innerHTML".
<html>
<body>
<div id="div">hello</div>
<script type="text/javascript">
document.write("div: " + ("innerHTML" in document.getElementById("div")));
document.write("<br />");
document.write("div.child: " + ("innerHTML" in document.getElementById("div").firstChild));
</script>
</body>
</html>
produces:
div: true
div.child: false
If you want to check the style of something, you do not need innerHTML. Instead, access the display value directly from the style element that is defined by default on DOM elements.
var children = summaryDiv.childNodes; // Avoid excessive scope chain walking (faster!)
for ( var i=0, l=children.length; i<l; i++ ) {
if ( children[i].style && children[i].style.display == "block" ) {
flag = false;
}
}
Use the display property directly:
for (var i = 0; i < summaryDiv.childNodes.length; i++) {
if (summaryDiv.childNodes[i].style && summaryDiv.childNodes[i].style.display == 'block') {
flag = false;
}
}