FileList: length property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is available in Web Workers.
The length read-only property of the FileList interface returns the number of files in the FileList.
Value
A number indicating the number of files in the list.
Examples
Printing the number of files selected
In this example, we use length to find the number of items in the FileList.
HTML
html
<input type="file" multiple />
<div class="output"></div>
JavaScript
js
const fileInput = document.querySelector("input[type=file]");
const output = document.querySelector(".output");
fileInput.addEventListener("change", () => {
const fileList = fileInput.files;
output.textContent = `You've selected: ${fileList.length} file(s)`;
});
Result
Specifications
| Specification |
|---|
| File API # dfn-length |
Browser compatibility
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