1.使用visibilitychange
浏览器
标签页被隐藏或显示的时候会触发visibilitychange
事件.
document.addEventListener("visibilitychange", function() {console.log(document.visibilityState);if(document.visibilityState == "hidden") {console.log('隐藏');} else if (document.visibilityState == "visible") {console.log('显示')}});
2.使用onblur和onfocus
通过获取失去焦点判断页面是否在最前端
var count = 1;var interval_output = null;function output_number() {document.body.innerHTML += (count + " ");count++;}// window 失去焦点,停止输出window.onblur = function() {clearInterval(interval_output);};// window 每次获得焦点window.onfocus = function() {// 每 1 秒在页面输出一个数interval_output = setInterval(function() {output_number();}, 1000);}
参考地址:/question/541794991.html
/zh-CN/docs/Web/Events/visibilitychange
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