H5调用手机拍照并展示在前端页面

<!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>手机拍照</title>
    <style>
        #showimg{
            width: 150px;
            height: 150px;
        }
        #file_input{
            opacity: 0;
            position: absolute;
            width: 100%;
            height: 100;
        }
        #box{
            position: relative;
            background: green;
        }
    </style>
</head>

<body>
    <div class="file-box" id="box">
        拍照上传
        <input type="file" accept="image/*" capture="camera" id="file_input" class="file-btn">
    </div>

    <img id="showimg">
</body>

</html>

<script>
    var showimg = document.getElementById("showimg");
    var imginput = document.getElementById("file_input");
    document.getElementById("box").onclick = function () {
        imginput.onchange = function () {
            var files = this.files;
            console.log(files)   //本地的临时路径

               // var formdata = new FormData();
                //formdata.append(\'fileStream\', files);
　　　　　　　　　//　formdata再传给后台



            var url = URL.createObjectURL(files[0]);
            showimg.src = url;
        }
    }

</script>