文档
- https://developer.mozilla.org/zh-CN/docs/Web/API/EventTarget/addEventListener
- https://developer.mozilla.org/zh-CN/docs/Web/API/EventTarget/removeEventListener
语法
// 添加事件监听
target.addEventListener(type, listener[, options]);
target.addEventListener(type, listener[, useCapture=false]);
// 移除事件监听
target.removeEventListener(type, listener[, options]);
target.removeEventListener(type, listener[, useCapture=false]);
示例
<button onclick="addClickEventListener()">添加事件监听</button>
<button onclick="removeClickEventListener()">移除事件监听</button>
<script>
// 事件处理函数
function handleEvent(event) {
console.log(event)
}
// 添加事件监听
function addClickEventListener() {
console.log('addClickEventListener')
document.addEventListener('click', handleEvent)
}
// 移除事件监听
function removeClickEventListener() {
console.log('removeClickEventListener')
document.removeEventListener('click', handleEvent)
}
</script>
在线Demo: https://mouday.github.io/front-end-demo/eventListener.html