The NodeList.length
property returns the number of items in a NodeList
.
Syntax
numItems = nodeList.length
numItems
is an integer value representing the number of items in aNodeList
.
Example
The length
property is often useful in DOM programming. It's often used to test the length of a list, to see if it exists at all. It's also commonly used as the iterator in a for
loop, as in this example.
// All the paragraphs in the document var items = document.getElementsByTagName("p"); // For each item in the list, // append the entire element as a string of HTML var gross = ""; for (var i = 0; i < items.length; i++) { gross += items[i].innerHTML; } // gross is now all the HTML for the paragraphs
Specifications
Specification | Status | Comment |
---|---|---|
DOM The definition of 'NodeList: length' in that specification. |
Living Standard |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
length | Chrome Full support 1 | Edge Full support 12 | Firefox Full support Yes | IE ? | Opera Full support Yes | Safari Full support Yes | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS Full support Yes | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown