SOURCE

console 命令行工具 X clear

                    
>
console
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title></title>
</head>
<body>
  <script>
  	function log1(){
      let o = 10;
      console.log(o)
    }
    log1();
  </script>
</body>
</html>