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js批量上传文件特效代码
董哥2023-08-0240次围观
今天接受项目中要完成文件批量上传文件而且还要显示上传进度，一开始觉得这个应该不是很麻烦，当我在做的时候遇到了很多问题，很头疼啊。不过看了别人写的代码，自己也测试过，发现网上好多都存在一些问题，并不是自己想要的，可实现删除，图片预览，文件批量上传，显示文件大小等功能。
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<script src="js/vue.min.js">
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<div id="app">
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<div class="hello">
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<div class="upload"> -
<div class="upload_warp"> -
<div class="upload_warp_left" @click="fileClick"> -
<img src="img/upload.png"> -
div> -
<div class="upload_warp_right" @drop="drop($event)" @dragenter="dragenter($event)" @dragover="dragover($event)"> -
或者将文件拖到此处 -
div> -
div> -
<div class="upload_warp_text"> -
选中{{imgList.length}}个文件，共{{bytesToSize(this.size)}} -
<span class="ml20 c-red">[单个附件的最大尺寸为10MB]span> -
div> -
<input @change="fileChange($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="img/del.png" class="upload_warp_img_div_del" @click="fileDel(index)"> -
div> -
<img :src="item.file.src"> -
div> -
div> -
div> -
div> -
div> -
<script>
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var app = new Vue({
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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); -
} -
} -
})
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<div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';">
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div>
