input[type="file"]上传图片并显示图片

时间：2023-03-08 18:25:37
<!DOCTYPE html>

<html>

    <head>

        <meta charset="UTF-8">

        <title></title>

        <style>

            .hide{

                display: none !important;

            }

            .fileBox{

                padding: 40px 0 20px 0;

            }

            .fileInfo{

                font-size: 14px;

                margin-bottom: 20px;

            }

            .close{

                width: 20px;

                height: 20px;

                position: absolute;

                right: 10px;

                top: 10px;

                background: url('img/close.svg') no-repeat center center;

                z-index: 99;

            }

            .baseImg{

                width: 200px;

                height: 200px;

                display: inline-block;

                position: absolute;

                top: 0;

                left: 0;

                z-index: -1;

            }

            .inputBox{

                width: 200px;

                height: 200px;

                position: relative;

                margin-bottom: 30px;

                cursor: pointer;

            }

            .fileInput{

                width: 100%;

                height: 100%;

                opacity: 0;

                cursor: pointer;

            }

            .add{

                position: absolute;

                top: 0;

                left: 0;

                z-index: -1;

                width: 100%;

                height: 200px;

                line-height: 200px;

                text-align: center;

                border: 2px solid #9CC7F2;

                font-size: 40px;

                color: #B4B4B4;

            }

        </style>

    </head>

    <body>

        <div class="fileBox">

            <div class="fileInfo">第一张图</div>

            <div class="inputBox">

                <i class="close hide" id="close1"></i>

                <input type="file" name="pic" class="fileInput" id="pic1" accept="image/gif,image/jpg,image/png" onChange="inputChange('pic1','inputImg1','add1','close1')" />

                <img src="" alt="" id="inputImg1" class="baseImg hide"/>

                <div class="add" id="add1">+</div>

            </div>

        </div>

        <script src="js/jquery.min.js"></script>

        <script>

            function inputChange(picId,imgId,addId,closeId){

                var files = document.getElementById(picId).files;

                console.log(files);

                if(files.length == 0) return;

                var form = new FormData(),

                    file = files[0];

                form.append('file', file);

                var reader = new FileReader();

                reader.readAsDataURL(file); //base64

                //接收到图片时触发onload

                reader.onload = function(e){

                    var result = reader.result;

                    console.log(result);

                    document.getElementById(imgId).src = result;

                    document.getElementById(imgId).classList.remove('hide');

                    document.getElementById(addId).classList.add('hide');

                    document.getElementById(closeId).classList.remove('hide');

                };

//                $.ajax({

//                    url: '/upload',

//                    type: 'POST',

//                    cache: false,

//                    data: formData,

//                    processData: false,

//                    contentType: false

//                }).done(function(res) {

//

//                }).fail(function(res) {});

            }

//            document.getElementById('pic1').addEventListener('click', function() { this.value = ''; }, false);

            $(function(){

                $('.close').click(function(){

                    $(this).addClass('hide');

                    $(this).siblings('.add').removeClass('hide');

                    $(this).siblings('img').addClass('hide');

                })

            })

        </script>

    </body>

</html>

效果展示：

input[type="file"]上传图片并显示图片

上传图片后：

input[type="file"]上传图片并显示图片

参考文章： https://my.oschina.net/u/2306318/blog/845836

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