map循环.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <button onclick="test()">点击</button>
    <p id="demo"></p>
    <script>
        function test() {
            var arrmap = [1, 2, 3, 5, 9];
            var demo = document.getElementById("demo");
            demo.innerHTML = "";
            //console.log(demo.innerHTML);
            arrmap.map((item, index, arrmap) => {
                demo.innerHTML = demo.innerHTML + "index[" + index + "]: " + item + "<br>";
            })

        }

    </script>
</body>

</html>