HTMLInputElement: cancel event - Web APIs

HTMLInputElement: cancel event - Web APIs | MDN

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("cancel", (event) => { })

oncancel = (event) => { }

Examples

Canceling an input element

HTML

html

<label for="file">Select a file. Or don't.</label>
<input type="file" id="file" name="file" />

<div id="result"></div>

div {
  margin-bottom: 10px;
}

JavaScript

const elem = document.getElementById("file");

const result = document.getElementById("result");

elem.addEventListener("cancel", () => {
  result.textContent = "Canceled.";
});

elem.addEventListener("change", () => {
  if (elem.files.length === 1) {
    result.textContent = "File Selected.";
  }
});

Result

Open the file selector, then close the selection dialog with the escape key or the cancel button. Both of these will cause the cancel event to be fired. Also, try selecting a local file on your machine; then reopen the file selection window and reselect the same file. This too causes the cancel event to be fired.