Javascript知识汇总------手写多文件上传组件

手写基于JQ的组件开发，适合用于多文件上传（图片、pdf、压缩包上传等）

<!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>
    <style>
        .picUpCont label {
            width: 100%!important;
        }
        .fileBox_loading.hide {
            display: none;
        }
        .picUpWrap {
            width: 100%;
            overflow: hidden;
            text-align: center;
            /* padding-right: 15px; */
            padding-bottom: 5px;
        }
        .fileBox {
            width: 100px;
            height: 100px;
            margin-bottom: 30px;
            float: left;
            position: relative;
            margin: 0 5px 40px;
        }
        .filesInput {
            display: none;
        }
        .uploadBtn .fileBox_addBtn {
            width: 100%;
            height: 100%;
            font-size: 40px;
            line-height: 100px;
            text-align: center;
            color: #666;
            border: 1px dashed #ccc;
            box-sizing: border-box;
        }
        .uploadBtn .fileBox_showImg{
            position: absolute;
            width: 100%;
            top: 0;
            bottom: 0;
            left: 0;
            margin: auto;
        }
        .fileBox .fileBox_addBtn {
            width: 100%;
            height: 100%;
            font-size: 40px;
            line-height: 100px;
            text-align: center;
            color: #666;
            border: 1px dashed #ccc;
            box-sizing: border-box;
        }
        .fileBox .fileBox_showImg{
            position: absolute;
            width: 100%;
            top: 0;
            bottom: 0;
            left: 0;
            margin: auto;
        }
        .fileBox input {
            display: none;
        }
        .uploadBtn .fileBox_discription{
            position: absolute;
            width: 100%;
            bottom: -25px;
            text-align: center;
            color: #999;
            font-size: 14px;
            text-decoration: underline;
        }
        .uploadBtn .fileBox_discription1{
            position: absolute;
            width: 100%;
            bottom: -25px;
            text-align: center;
            color: #999;
            font-size: 14px;
        }
        .fileBox .fileBox_discription{
            position: absolute;
            width: 100%;
            bottom: -25px;
            text-align: center;
            color: #999;
            font-size: 14px;
            text-decoration: underline;
        }
        .fileBox .fileBox_discription1{
            position: absolute;
            width: 100%;
            bottom: -25px;
            text-align: center;
            color: #999;
            font-size: 14px;
        }
        .fileBox_loading {
            position: absolute;
            width: 100%;
            background: url('/public/home/imgs/loading.gif') center center no-repeat;
            background-size: 50px 50px;
            height: 100%;
        }
        .uploadCont {
            overflow: hidden;
            padding: 5px 15px;
        }
        .showPic {
            position: fixed;
            width: 100%;
            height: 100%;
            top: 0;
            left: 0;
            z-index: 999;
            display: none;
            overflow: auto;
        }
        .showPic .showPic_mask {
            background: rgba(0,0,0,.5);
            position: absolute;
            width: 100%;
            height: 100%;
            left: 0;
            top: 0;
            z-index: 1;
            display: block;
        }
        .showPic .showPic_img {
            position: absolute;
            width: 90%;
            height: auto;
            top: 50%;
            z-index: 2;
            transition: all .5s;
            opacity: 0;
            left: 0;
            right: 0;
            margin: auto;
        }
        .showPic .showPic_loading {
            width: 50px;
            height: 50px;
            position: absolute;
            top: 0;
            bottom: 0;
            left: 0;
            right: 0;
            margin: auto;
        }
        .showPic_desTxt {
            width: 100%;
            position: absolute;
            bottom: 40px;
            color: #fff;
            z-index: 9;
            text-align: center;
            font-size: 16px;
        }
        .uploadBtn {
            width: 30%;
            height: 100px;
            margin-bottom: 30px;
            float: left;
            position: relative;
            margin: 0 5px 40px;
        }
    </style>
</head>
<body>
    <div id="no_limit_uploadCont">
        <div class="fileBox up-section">
                <div class="fileBox_loading" style="display:none;"></div>
                <img class="fileBox_showImg" src="loading.gif" original="loading.gif">
                <div class="fileBox_discription" style="display:block;">点击删除</div>
        </div>
        
        <div class="fileBox" id="uploadBtn">
                <div class="fileBox_addBtn">+</div>
                <!-- <div class="fileBox_discription" style="display:block;">点击上传</div> -->
                <input type="file" class="filesInput" multiple  />
        </div>
    </div>
    <script src="jquery.js"></script>
    <script src="jquery.fileUpload_nolimit.js"></script>
    <script>
        var nolimit_upload = new No_limitUpload('no_limit_uploadCont');
        nolimit_upload.init({
        });
    </script>
</body>
</html>

插件下载地址：https://files.cnblogs.com/files/iwzyuan/jquery.fileUpload_nolimit.js

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原文地址：https://www.cnblogs.com/iwzyuan/p/8920441.html