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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?

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?

  • javascript
  • html
Share Improve this question edited Jan 12, 2010 at 6:39 Steve Harrison 126k17 gold badges89 silver badges72 bronze badges asked Jan 12, 2010 at 5:06 niminimi 5,50718 gold badges62 silver badges90 bronze badges 1
  • Changed all occurrences of innerHtml in question to innerHTML—JavaScript is case-sensitive. – Steve Harrison Commented Jan 12, 2010 at 6:42
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3 Answers 3

Reset to default 5

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;
    }
}

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

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