1、概述
这个js包括按钮样式，列表样式、带有删除、添加、放大（使用的是自带的放大功能，提供有API来放入你的弹窗来进行展示）
| 可监听的事件 | Value | wdaasd |
|---|---|---|
| onlargeClickCallBack | 如果想使用自己的弹窗，只需要监听这个函数，拿到返回值给你的弹窗的img->href进行赋值即可 | imgFile对象（包括这个被点击图片的全部信息）that（这个js的全局唯一对象，可以在这里面拿到你所有的值） |
| ondialogBeforeClose | 自带的弹窗被关闭的回调 | object 返回值是一个对象 对象.event -> 被执行的事件的源事件 对象.imgFile -> 被点击关闭弹窗时，目前弹窗上展示的图片对象信息 |
| onaddImgList | 每添加一个图片的回调 | file -> 文件对象 that -> （这个js的全局唯一对象，可以在这里面拿到你所有的值） |
2、创建对象的参数
| 参数 | 含义 |
|---|---|
| maxFileLength | 最大可以存在的文件个数 默认值：2 |
| maxFileSize | 每个文件单独最大的文件大小 默认值：1024 （1M） |
| fileSuffix | 允许上传的文件后缀 默认值：['mp4', 'mp3', 'word', 'pdf', 'ppt', 'excel', 'jpg', 'png'] |
| StopDialog | 是否阻止打开自带的默认弹窗 默认值：false |
| shadeDialogStyle | 如果打开自带弹窗的选项，那么这个控制打开的弹窗高宽多少默认值：[null, null],默认为null为自适应，如果想要设置百分比和px 请直接改变数组[0,1]，数组第一项代表宽，第二项代表高 |
| showBtnImgStyle | 是否开启按钮样式 默认值：false |
使用代码示例：
<div class="hj-file">
<input type="file" file="" class="hj-file-input">
<div class="hj-box hj-append-item">
<div class="append-item margin-class">
<div class="img-push">
<img src="./img/push.png" alt="">
</div>
</div>
</div>
<!-- 在不开启按钮样式时，这个外层div可以删除 -->
<div class="hj-btn-box hj-hidden">
<div class="hj-btn">
选择图片
</div>
</div>
<!-- 文件信息列表 -->
<div class="hj-file-list">
</div>
</div>
var file = new File({
maxFileLength: 2,
maxFileSize: 1024,
fileSuffix: ['mp4', 'mp3', 'word', 'pdf', 'ppt', 'excel', 'png', 'jpg'],
StopDialog: false,
showBtn: false
});
initHJFile(file);
3、监听例子
//如果不想使用自带的弹窗，可以选择监听file对象的onlargeClickCallBack函数
file.callBack.onlargeClickCallBack = function (img, that) {}
file.callBack.ondialogBeforeClose = function (event) {}
file.callBack.onaddImgList = function () {}
4、使用方法
项目目录如上图所示
如果要使用，只需要把js放入你的项目路径下，然后把img放到你的static目录（静态资源路径）。
这里js里面默认引入的图标是 ./ 的相对路径，请自行搜索然后进行更改为你项目的文件路径
上图项目示例为可直接打开查看的完整包，后文有下载地址
5、源代码
此源代码为不包括图标的源代码，全部在一个html页面里面
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<style>
* {
padding: 0;
margin: 0;
}
body {
width: 100vw;
height: 100vh;
}
.hj-file {
width: 100%;
}
.hj-file-input {
display: none;
}
.hj-box {
display: flex;
flex-wrap: wrap;
}
.append-item {
width: 150px;
height: 150px;
border: 1px dashed #b1b5bb;
border-radius: 5px;
background-color: #fbfdff;
display: flex;
align-items: center;
margin: 10px;
justify-content: center;
}
.image-item {
width: 150px;
height: 150px;
border-radius: 5px;
margin: 10px;
display: flex;
justify-content: center;
align-items: center;
border: 1px solid #eaedf1;
position: relative;
background-size: 100% 100%;
background-repeat: no-repeat;
transition: 1s;
animation: translaters 1s;
}
.image-item-delete {
animation: bottom-translaters .7s;
}
@keyframes translaters {
0% {
opacity: .2;
transform: translate(0, -50%);
}
100% {
opacity: 1;
transform: translate(0);
}
}
@keyframes bottom-translaters {
0% {
opacity: 1;
transform: translate(0, 0);
}
100% {
opacity: .2;
transform: translate(0, 50%);
}
}
.img-push img {
width: 60px;
height: 60px;
}
.append-item:hover {
border-color: #00d2fc;
}
.margin-class {
margin-bottom: 20px;
}
.first {
background-image: url('./img/66.jpg');
}
.z-index-promote {
z-index: 3;
}
.largeImg img {
cursor: pointer;
width: 30px;
height: 30px;
transition: .6s;
display: none;
}
.deleteImg img {
cursor: pointer;
width: 40px;
height: 40px;
display: none;
}
.image-item:hover::before {
content: "";
z-index: 2;
background-color: #42393999;
width: 100%;
position: absolute;
height: 100%;
border-radius: 5px;
transition: .6s;
animation: transparency linear .6s;
}
.image-item:hover .largeImg img {
display: block;
animation: transparency linear .6s;
}
.image-item:hover .deleteImg img {
display: block;
animation: transparency linear .6s;
}
@keyframes transparency {
0% {
opacity: 0;
}
100% {
opacity: 1;
}
}
.hj-shade {
width: 100vw;
height: 100vh;
background-color: #302d2d99;
position: fixed;
overflow: hidden;
z-index: 1978;
display: flex;
left: 50%;
top: 50%;
transform: translate(-50%, -50%);
justify-content: center;
align-items: center;
animation: hj-shade-sacle .5s;
}
@keyframes hj-shade-sacle {
0% {
transform: translate(-50%, -50%) scale(0%);
}
100% {
transform: translate(-50%, -50%) scale(100%);
}
}
@keyframes hj-shade-hidden {
0% {
transform: translate(-50%, -50%) scale(100%);
}
100% {
transform: translate(-50%, -50%) scale(0%);
}
}
.hj-shade-hidden {
animation: hj-shade-hidden .5s;
}
.hj-shade {
overflow: auto;
}
.hj-shade .hj-box {
width: 60%;
height: 80%;
padding: 20px 10px 10px 10px;
background-size: 100% 100%;
background-color: white;
}
.hj-shade .hj-box .hj-img {
width: 100%;
overflow: auto;
height: 100%;
}
.hj-file-list .hj-file-list-item {
background-color: white;
color: #8cacb3;
display: flex;
line-height: 2;
font-size: 0.8em;
}
.hj-file-list .hj-file-list-item:hover {
background-color: #00d2fc70;
color: white;
}
.hj-file-list .hj-file-list-item .hj-left {
width: 30%;
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
}
.hj-file-list .hj-file-list-item .hj-left span {
margin-left: 20px;
cursor: pointer;
}
.hj-file-list .hj-file-list-item .hj-right {
width: 30%;
display: flex;
align-items: center;
justify-content: end;
}
.hj-file-list .hj-file-list-item .hj-right span {
margin-right: 20px;
}
.hj-file-list .hj-file-list-item .hj-right img {
width: 20px;
height: 20px;
cursor: pointer;
}
@keyframes hj-list-hidden {
0% {
opacity: 1;
}
100% {
opacity: 0;
}
}
.hj-list-hidden {
animation: hj-list-hidden .7s;
}
.hj-btn-box {
margin-bottom: 25px;
}
.hj-btn-box .hj-btn {
margin-left: 20px;
cursor: pointer;
background-color: #009efa;
width: 30%;
line-height: 2;
border-radius: 4px;
color: white;
font-size: 1.2em;
text-align: center;
}
.hj-hidden {
display: none;
}
</style>
<body>
<div class="box">
<div class="hj-file">
<input type="file" file="" class="hj-file-input">
<div class="hj-box hj-append-item">
<div class="append-item margin-class">
<div class="img-push">
<img src="./img/push.png" alt="">
</div>
</div>
</div>
<div class="hj-btn-box hj-hidden">
<div class="hj-btn">
选择图片
</div>
</div>
<div class="hj-file-list">
</div>
</div>
</div>
<script>
// File构造函数
function File(obj) {
// 文件总个数
this.fileLength = 0;
// 文件数组
this.fileList = [];
// 对象参数配置文件
this.config = {
// 最大文件个数
maxFileLength: obj.maxFileLength || 2,
// 最大文件大小
maxFileSize: obj.maxFileSize || 1024,
// 允许的文件后缀
fileSuffix: obj.fileSuffix || ['mp4', 'mp3', 'word', 'pdf', 'ppt', 'excel', 'jpg', 'png'],
// 是否阻止默认打开弹窗
StopDialog: obj.StopDialog || false,
// 弹窗的样式 宽 高
shadeDialogStyle: obj.shade || [null, null],
// 是否开启按钮样式
showBtnImgStyle: obj.showBtn || false,
};
// fileDom中存储的唯一的dom节点
this.dom = {
// input 文件选中输入框dom
inputDom: null,
// append-item 添加点击dom
imageItemDom: null,
// 要向hj-append-item节点后面追加图片的dom
appendItemDom: null,
// 要向hj-file-list节点后面添加图片列表的dom
appendListDom: null,
};
// 事件处理对象
this.event = {
// append-item点击事件处理
imageItemClick: () => {
this.dom.inputDom.click();
},
// input 文件选中输入框选择完图片之后事件处理
changeLoadFile: (file) => {
this.method.filterFile(file.target.files);
},
// 图片删除事件
imgDeleteClick: (id) => {
for (let index = 0; index < this.fileList.length; index++) {
if (this.fileList[index].id == id) {
let _before = this.fileList.slice(0, index == this.fileList.length ? index - 1 :
index);
let _after = this.fileList.slice(index + 1);
_before = _before.concat(_after);
// 删除图片
this.method.deleteImg(id);
setTimeout(() => {
this.fileList[index].dom.remove();
this.fileList[index].listDom.remove();
this.fileLength--;
this.fileList = _before;
}, 600);
break;
}
}
1
},
// 图片放大事件
imgLargeClick: (id) => {
let imgFile = this.privateUtils.foreachFileListToId(id);
console.log(imgFile);
this.callBack.onlargeClickCallBack(imgFile, this);
if (this.config.StopDialog) return;
let hjShadeDiv = document.getElementsByClassName('hj-shade');
if (hjShadeDiv.length != 0) return;
let div = document.createElement('div');
div.className = 'hj-shade';
let div2 = document.createElement('div');
div2.className = 'hj-box';
let img = document.createElement('img');
img.className = 'hj-img';
img.src = imgFile.base64;
div2.appendChild(img);
div.addEventListener('click', (event) => {
this.callBack.ondialogBeforeClose({
event: event,
imgFile: imgFile,
});
div.className = div.className + ' hj-shade-hidden';
setTimeout(() => {
document.body.removeChild(div);
}, 500);
})
// 防止在按钮模式下，会出现第一次没有加载完成，高长为0的不正常情况
img.onload = () => {
div.appendChild(div2);
document.body.appendChild(div);
this.privateUtils.computeDialogWH(img, div2);
}
},
},
this.method = {
// 过滤图片
filterFile: (list) => {
for (let index = 0; index < list.length; index++) {
let size = parseInt(list[index].size / 1024);
let suffix = list[index].name.substring(list[index].name
.lastIndexOf('.') + 1);
// 是否符合后缀
let isTrue = false;
// 判断文件大小
if (size > this.config.maxFileSize) {
console.log("文件太大");
break;
}
for (let j = 0; j < this.config.fileSuffix.length; j++) {
if (suffix == this.config.fileSuffix[j]) {
isTrue = true;
break;
}
}
if (isTrue) {
let id = parseInt(Math.random() * 100000);
this.fileList.push({
id: id,
file: list[index],
base64: '',
dom: '',
listDom: '',
});
console.log(this.fileList);
this.method.streamToImgBase64(list[index], id);
} else {
console.log("文件后缀不符合");
}
}
},
// 处理图片展示
streamToImgBase64: (file, id) => {
var fileReader = new FileReader();
fileReader.onload = (data) => {
this.method.appendImage(data.target.result, id);
}
fileReader.readAsDataURL(file);
},
// 追加图片到dom节点中
appendImage: (url, id) => {
let div = document.createElement('div');
div.className = 'image-item margin-class';
div.style.backgroundImage = 'url(' + url + ')';
for (let index = 0; index < this.fileList.length; index++) {
if (this.fileList[index].id == id) {
this.fileList[index].dom = div;
this.fileList[index].base64 = url;
break;
}
}
// 创建删除dom,全部使用addEventListener
let largeDom = document.createElement('div');
largeDom.className = 'largeImg z-index-promote';
largeDom.innerHTML = `<img src="./img/big.png" alt="">`;
largeDom.addEventListener('click', () => {
this.event.imgLargeClick(id);
})
let deleteDom = document.createElement('div');
deleteDom.className = 'deleteImg z-index-promote';
deleteDom.innerHTML = `<img src="./img/delete.png" alt="">`;
deleteDom.addEventListener('click', () => {
this.event.imgDeleteClick(id);
})
div.appendChild(largeDom);
div.appendChild(deleteDom);
this.dom.appendItemDom.appendChild(div);
this.fileLength++;
// 添加图片列表
this.method.addImgList(id);
},
// 删除图片
deleteImg: (id) => {
for (let index = 0; index < this.fileList.length; index++) {
if (this.fileList[index].id == id) {
let item = this.fileList[index];
let cless = item.dom.getAttribute('class');
let clessList = item.listDom.getAttribute('class');
this.fileList[index].dom.setAttribute("class", cless + " image-item-delete");
this.fileList[index].listDom.setAttribute("class", clessList + " hj-list-hidden ")
break;
}
}
},
// 添加图片列表
addImgList: (id) => {
let file = this.privateUtils.foreachFileListToId(id);
this.callBack.onaddImgList(file, this);
let div = document.createElement('div');
div.className = ' hj-file-list-item '
let div$left = document.createElement('div');
let div$right = document.createElement('div');
let file$img = document.createElement('img');
let fileSize = this.privateUtils.computeFileSize(file.file.size);
file$img.src = './img/delete-balck.png';
div$left.className = ' hj-left ';
div$right.className = ' hj-right ';
div$left.innerHTML = `<span>${file.file.name}</span>`
div$right.innerHTML = `<span>${fileSize}</span>`;
div$left.addEventListener('click', () => {
this.event.imgLargeClick(id);
})
file$img.addEventListener('click', () => {
this.event.imgDeleteClick(id);
})
div$right.appendChild(file$img);
div.appendChild(div$left);
div.appendChild(div$right);
for (let index = 0; index < this.fileList.length; index++) {
if (id == this.fileList[index].id) {
this.fileList[index].listDom = div;
break;
}
}
this.dom.appendListDom.appendChild(div);
},
}
// 暴露的监听Api
this.callBack = {
// 阻止默认自带的打开弹窗
onlargeClickCallBack: (img, that) => {},
// 自带的弹窗被关闭时的回调
// {event: 点击的源事件对象 imgFile: 被关闭的那张图片的全局file对象信息}
ondialogBeforeClose: (object) => {},
// 每一次添加图片列表时的回调
onaddImgList: (file, that) => {},
},
this.privateUtils = {
foreachFileListToId: (id) => {
for (let index = 0; index < this.fileList.length; index++) {
if (id == this.fileList[index].id) {
return this.fileList[index];
}
}
},
computeFileSize: (size) => {
let result = parseInt(size / 1024);
if (result < 1024) {
return result + '.KB';
} else if (result >= 1024) {
return parseInt(result / 1024) + ".MB";
}
},
// 计算弹窗的高度和长度
computeDialogWH: (img, dom) => {
let w = this.config.shadeDialogStyle[0];
let h = this.config.shadeDialogStyle[1];
let w2 = img.naturalWidth;
let h2 = img.naturalHeight;
if (w2 > window.innerWidth * 0.9) {
w2 = window.innerWidth * 0.7;
h2 = window.innerHeight * 0.7;
}
dom.style.width = w == null ? w2 + "px" : w;
dom.style.height = h == null ? h2 + "px" : h;
}
}
}
var file = new File({
maxFileLength: 2,
maxFileSize: 1024,
fileSuffix: ['mp4', 'mp3', 'word', 'pdf', 'ppt', 'excel', 'png', 'jpg'],
StopDialog: false,
showBtn: false
});
initHJFile(file);
// 如果不想使用自带的弹窗，可以选择监听file对象的onlargeClickCallBack函数
file.callBack.onlargeClickCallBack = function (img, that) {}
file.callBack.ondialogBeforeClose = function (event) {}
file.callBack.onaddImgList = function () {}
// 加载初始信息，比如dom节点的添加
function initHJFile(file) {
console.log(file);
let input_dom = document.getElementsByClassName('hj-file-input')[0];
let imageItem_dom = document.getElementsByClassName('append-item')[0];
let appendItem_dom = document.getElementsByClassName('hj-append-item')[0];
let appendList_dom = document.getElementsByClassName('hj-file-list')[0];
file.dom.inputDom = input_dom;
file.dom.imageItemDom = imageItem_dom;
file.dom.appendListDom = appendList_dom;
if (file.config.showBtnImgStyle) {
// 开启按钮模式
appendItem_dom.style.display = 'none';
let btn = document.getElementsByClassName('hj-btn-box');
console.log(btn);
if (btn.length != 0) {
btn[0].className = 'hj-btn-box';
btn[0].children[0].addEventListener('click', file.event.imageItemClick);
} else {
console.log("没有找到btn Class");
throw new Error('未定义按钮模式所需的HTML')
}
}
file.dom.appendItemDom = appendItem_dom;
file.dom.imageItemDom.addEventListener('click', file.event.imageItemClick);
file.dom.inputDom.addEventListener('change', file.event.changeLoadFile)
}
</script>
</body>
</html>
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