Window: error event

当资源加载失败或无法使用时,会在Window对象触发error事件。例如:script 执行时报错。

Bubbles(支持冒泡) No
Cancelable(可撤销) No
Interface(接口) Event or UIEvent
Event handler property(事件处理程序属性) onerror

如果它是由用户界面元素生成的,或者是由事件实例生成的,那么此事件是UIEvent实例。

示例

在线示例

HTML

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

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);
});

结果

规范

Specification
HTML Standard
# event-error
HTML Standard
# handler-onerror

浏览器兼容性

BCD tables only load in the browser

相关事件

  • This event on Element targets: error event