The loadend
event is fired when a file read has completed, successfully or not.
Examples
Live example
HTML
<div class="example">
<div class="file-select">
<label for="avatar">Choose a profile picture:</label>
<input type="file"
id="avatar" name="avatar"
accept="image/png, image/jpeg">
</div>
<img src="" class="preview" height="200" alt="Image preview...">
<div class="event-log">
<label>Event log:</label>
<textarea readonly class="event-log-contents"></textarea>
</div>
</div>
CSS
img.preview {
margin: 1rem 0;
}
.event-log-contents {
width: 18rem;
height: 5rem;
border: 1px solid black;
margin: .2rem;
padding: .2rem;
}
.example {
display: grid;
grid-template-areas:
"select log"
"preview log";
}
.file-select {
grid-area: select;
}
.preview {
grid-area: preview;
}
.event-log {
grid-area: log;
}
.event-log>label {
display: block;
}
.event-log-contents {
resize: none;
}
JS
const fileInput = document.querySelector('input[type="file"]');
const preview = document.querySelector('img.preview');
const eventLog = document.querySelector('.event-log-contents');
const reader = new FileReader();
function handleEvent(event) {
eventLog.textContent = eventLog.textContent + `${event.type}: ${event.loaded} bytes transferred\n`;
if (event.type === "load") {
preview.src = reader.result;
}
}
function addListeners(reader) {
reader.addEventListener('loadstart', handleEvent);
reader.addEventListener('load', handleEvent);
reader.addEventListener('loadend', handleEvent);
reader.addEventListener('progress', handleEvent);
reader.addEventListener('error', handleEvent);
reader.addEventListener('abort', handleEvent);
}
function handleSelected(e) {
eventLog.textContent = '';
const selectedFile = fileInput.files[0];
if (selectedFile) {
addListeners(reader);
reader.readAsDataURL(selectedFile);
}
}
fileInput.addEventListener('change', handleSelected);
Result
Specifications
Specification |
Status |
File API |
Working Draft |
Browser compatibility
| Desktop | Mobile |
---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Firefox for Android | Opera for Android | Safari on iOS | Samsung Internet |
---|
loadend event | Chrome
Full support
Yes | Edge
Full support
12 | Firefox
Full support
Yes | IE
Full support
Yes | 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
See also