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<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="UTF-8"> <title>帧数</title> </head> <body> <div id="div"></div> </body> <script> var count = 0; var flag = true; var cishu = 1; function fun(){ ++count; console.log("执行中"); if(flag){ requestAnimationFrame(arguments.callee); } } let computedZhen = fun; computedZhen(); setInterval(function() { flag = false;//关闭flag是为了关闭递归 let node = document.getElementById('div'); ++cishu; node.innerText = '帧数（fps）：'+count + " 更新次数：" + cishu; count = 0; flag = true; }, 1000); </script> </html>
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