html上传图片代码
❶ html实现图片上传
html：
<section class="upload-section">
<article class="upload-piclist">
<div class="upload-file">
<input type="file" id="file" accept="image/*" multiple onchange="imgChange()"/>
</div>
</article>
</section>
css:
/* body {
margin: 0;
padding: 0;
max-width: 414px;
margin: 0 auto;
} */
.upload-fh {
background-image: url('data:image/png;base64,/NlyAAAD1klEQVRoQ+++d972/++T//++XRa2drCkDwG8E4B+A9BH8maZ2FrBkj4D8GYA+hHAKyT/thSRYiGnZtgJogeSgFNglYkgX/+/YOlgSf0AohTOkoBekj/B19KwBdcOz/++5mGm4WttHa3D892xJAspTwXX3Pae//+/+mIZ6GzAjt7iJ49RraWhf+gWnRXY0RaY2Frd/+/yB7sE9nCeW+p8Hjbm2nDAKwcahbAdGPfTGt3nM53/V00ckNMKWY8LAAAAABJRU5ErkJggg==');
background-repeat: no-repeat;
background-size: 100% 100%;
height: 30px;
width: 30px;
}
.upload-hedaer {
height: 55px;
display: grid;
grid-template-columns: repeat(3, 1fr);
padding: 0 10px;
box-sizing: border-box;
align-items: center;
text-align: center;
background: #287cff;
color: #fff;
border-bottom: 1px solid #efefef;
font-size: 19px;
}
.upload-hedaer div:last-child {
text-align: right;
}
.upload-textarea {
width: 100%;
height: 60px;
font-size: 28px;
border: 1px solid #efefee;
max-height: 300px;
}
.upload-article-text {
width: 100%;
padding: 10px;
box-sizing: border-box;
}
.upload-file {
position: relative;
background: url('../images/z_add.png') no-repeat 50%/100% 100%;
/* width: 100px; */
height: 120px;
order: 9;
}
.upload-piclist {
padding: 0 10px;
box-sizing: border-box;
display: grid;
grid-template-columns: repeat(3, 120px);
justify-content: space-between;
grid-gap: 14px;
}
#file {
width: 100%;
height: 100%;
opacity: 0;
}
.upload-Picitem {
width: 100%;
height: 120px;
}
.upload-Picitem>img {
width: 100%;
height: 100%;
object-fit: cover;
}
.submit {
padding: 15px 0;
background-color: #287cff;
color: #fff;
text-align: center;
margin: 10px;
font-size: 20px;
border-radius: 10px;
}
.upload-sm {
padding: 10px;
box-sizing: border-box;
color: gray;
}
.upload-sm ol>li {
margin-bottom: 10px;
}
js:let picmax = 9; //限制上传数量
function imgChange() {
let file = document.getElementById('file').files;
let imglist = document.querySelectorAll('.upload-Picitem');
let piclist = document.getElementsByClassName('upload-piclist')[0];
let filelist = file.length + imglist.length > picmax ? 9 - imglist.length : file.length + imglist.length;
if (file.length + imglist.length >= 9) {
let uploadfile = document.getElementsByClassName('upload-file')[0]
uploadfile.style.display = "none"
}
for (let i = 0; i < filelist; i++) {
readerfile(file[i]).then(e => {
let html = document.createElement('div');
html.className = 'upload-Picitem'
html.innerHTML = '<img src=' + e + ' alt="pic">'
piclist.appendChild(html);
})
}
}
function readerfile(file) {
return new Promise((resolve, reject) => {
let reader = new FileReader();
reader.addEventListener("load", function() {
resolve(reader.result);
}, false)
if (file) {
reader.readAsDataURL(file)
}
})
}
//提交
function submit() {
let imglist = []
let text = document.getElementsByClassName('upload-textarea')[0].value
let piclist = document.querySelectorAll('.upload-Picitem');
for (let i = 0; i < piclist.length; i++) {
imglist.push(piclist[i].lastChild.src)
}
console.log("发布内容：", text)
console.log("图片列表：", imglist)
}
//textarea高度自适应
var autoTextarea = function(elem, extra, maxHeight) {
extra = extra || 0;
var isFirefox = !!document.getBoxObjectFor || 'mozInnerScreenX' in window,
isOpera = !!window.opera && !!window.opera.toString().indexOf('Opera'),
addEvent = function(type, callback) {
elem.addEventListener ?
elem.addEventListener(type, callback, false) :
elem.attachEvent('on' + type, callback);
},
getStyle = elem.currentStyle ? function(name) {
var val = elem.currentStyle[name];
if (name === 'height' && val.search(/px/i) !== 1) {
var rect = elem.getBoundingClientRect();
return rect.bottom - rect.top -
parseFloat(getStyle('paddingTop')) -
parseFloat(getStyle('paddingBottom')) + 'px';
};
return val;
} : function(name) {
return getComputedStyle(elem, null)[name];
},
minHeight = parseFloat(getStyle('height'));
elem.style.resize = 'none';
var change = function() {
var scrollTop, height,
padding = 0,
style = elem.style;
if (elem._length === elem.value.length) return;
elem._length = elem.value.length;
if (!isFirefox && !isOpera) {
padding = parseInt(getStyle('paddingTop')) + parseInt(getStyle('paddingBottom'));
};
scrollTop = document.body.scrollTop || document.documentElement.scrollTop;
elem.style.height = minHeight + 'px';
if (elem.scrollHeight > minHeight) {
if (maxHeight && elem.scrollHeight > maxHeight) {
height = maxHeight - padding;
style.overflowY = 'auto';
} else {
height = elem.scrollHeight - padding;
style.overflowY = 'hidden';
};
style.height = height + extra + 'px';
scrollTop += parseInt(style.height) - elem.currHeight;
document.body.scrollTop = scrollTop;
document.documentElement.scrollTop = scrollTop;
elem.currHeight = parseInt(style.height);
};
};
// addEvent('propertychange', change);
// addEvent('input', change);
// addEvent('focus', change);
change();
};
pic:z_add.png
❷ 在html页面里面制作一个上传图片的区域，就是点那个区域，就能上传照片，这个html代码应该怎么写
你好，html上传文件的代码如下：
<inputtype="file"name="fileUpload"/>
<inputtype="submit"value="上传文件"/>
至于你要说的有个区域显示图片的，这个需要配合前端开发才可以，单纯的html代码是做不到的，谢谢。
❸ html表单怎么上传图片
html表单这样上传图片：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "www.mobiletrain.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="www.mobiletrain.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>上传图片</title>
</head>
❹ html5网页背景图手动上传切换代码怎么写
html5网页背景图手动上传切换代码这样写。
1、html5网页背景图手动枣含上传切换代码需要在网页上点击鼠标右键查看网站源代码。
2、找到css里面的背景图这一段代码，查看背绝伏景凳宏笑图路径，通过ftp或者服务器进行替换图片即可。