js框架图片上传组件效果源码
代码结构
1. 引入JS
<script src="js/vue2.2.2.js"></script>
2. HTML代码
<div id="app"> <div class="hello"> <div class="upload"> <div class="upload_warp"> <div class="upload_warp_left" @click="fileClick"> <img src="./upload.png" alt="js框架图片上传组件效果源码"> </div> <div class="upload_warp_right" @drop="drop($event)" @dragenter="dragenter($event)" @dragover="dragover($event)"> 或者将文件拖到此处 </div> </div> <div class="upload_warp_text"> 选中{{imgList.length}}张文件，共{{bytesToSize(this.size)}} </div> <input @change="fileChange($event)" type="file" id="upload_file" multiple style="display: none"> <div class="upload_warp_img" v-show="imgList.length!=0"> <div class="upload_warp_img_div" v-for="(item,index) of imgList"> <div class="upload_warp_img_div_top"> <div class="upload_warp_img_div_text"> {{item.file.name}} </div> <img src="./del.png" alt="js框架图片上传组件效果源码" class="upload_warp_img_div_del" @click="fileDel(index)"> </div> <img :src="item.file.src"> </div> </div> </div> </div></div><script> // import up from './src/components/Hello' var app = new Vue({ el: '#app', data () { return { imgList: [], size: 0 } }, methods: { fileClick(){ document.getElementById('upload_file').click() }, fileChange(el){ if (!el.target.files[0].size) return; this.fileList(el.target.files); el.target.value = '' }, fileList(files){ for (let i = 0; i < files.length; i++) { this.fileAdd(files[i]); } }, fileAdd(file){ this.size = this.size + file.size;//总大小 let reader = new FileReader(); reader.vue = this; reader.readAsDataURL(file); reader.onload = function () { file.src = this.result; this.vue.imgList.push({ file }); } }, fileDel(index){ this.size = this.size - this.imgList[index].file.size;//总大小 this.imgList.splice(index, 1); }, bytesToSize(bytes){ if (bytes === 0) return '0 B'; let k = 1000, // or 1024 sizes = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'], i = Math.floor(Math.log(bytes) / Math.log(k)); return (bytes / Math.pow(k, i)).toPrecision(3) + ' ' + sizes[i]; }, dragenter(el){ el.stopPropagation(); el.preventDefault(); }, dragover(el){ el.stopPropagation(); el.preventDefault(); }, drop(el){ el.stopPropagation(); el.preventDefault(); this.fileList(el.dataTransfer.files); } } })</script><div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';"></div>
