Window: error event
The error
event is fired on a Window
object when a resource failed to load or couldn't be used — for example if a script has an execution error.
Bubbles | No |
---|---|
Cancelable | No |
Interface | Event or UIEvent |
Event handler property | onerror |
The event object is a UIEvent
instance if it was generated from a user interface element, or an Event
instance otherwise.
Examples
Live example
HTML
<div class="controls">
<button id="script-error" type="button">Generate script error</button>
<img class="bad-img" />
</div>
<div class="event-log">
<label>Event log:</label>
<textarea readonly class="event-log-contents" rows="8" cols="30"></textarea>
</div>
JS
const log = document.querySelector('.event-log-contents');
window.addEventListener('error', (event) => {
log.textContent = log.textContent + `${event.type}: ${event.message}\n`;
console.log(event)
});
const scriptError = document.querySelector('#script-error');
scriptError.addEventListener('click', () => {
const badCode = 'const s;';
eval(badCode);
});
Result
Specifications
Specification |
---|
UI Events # event-type-error |
Browser compatibility
BCD tables only load in the browser
See also
- This event on
Element
targets:error
event