<script type="text/javascript"> function setImagePreview() { var docObj = document.getElementById("ctl00_ContentMain_file_head"); var fileName = docObj.value; if (!fileName.match(/.jpg|.gif|.png|.bmp/i)) { alert('您上传的图片格式不对.请又一次选
第一种方式 <script type="text/javascript"> function setImagePreview() { var docObj = document.getElementById("ctl00_ContentMain_file_head"); var fileName = docObj.value; if (!fileName.match(/.jpg|.gif|.png|.bmp/i)) { alert('您上传的图片格式不正
window.URL.createObjectURL https://html5.xgqfrms.xyz/Canvas/safety-canvas.html var video = document.querySelector('video'); var audio = document.querySelector('audio'); var canvas = document.querySelectorAll('canvas')[0]; var canvasForDiff = document
//preview img : filereader方式 document.getElementById('imgFile').onchange = var ele = document.getElementById('imgFile').files[0]; var fr = new FileReader(); fr.onload = function(ele){ var pvImg = new Image(); pvImg.src = ele.target.result; pvImg.setA
Most developers are familiar with using img tags and assigning the src inside of HTML. It is also possible to only use JavaScript to fetch the image from another site, create a local url, and assign that to an img tag that you create. This lesson wal
HTMLMediaElement.srcObject & URL.createObjectURL & HTMLMediaElement.src Uncaught TypeError: Failed to execute 'createObjectURL' on 'URL': No function was found that matched the signature provided. https://learning.xgqfrms.xyz/000projects/pwa-photo
问题描述:通过Swagger接口导出Excel模板文件时,报错:URL.createObjectURL: Argument 1 is not valid for any of the 1-argument overloads. 问题现象: 解决方案: 1.打开浏览器调试窗口,将请求复制为cURL命令 火狐浏览器: 谷歌浏览器: 2.将cURL命令粘贴到命令行窗口中,在命令最后加上" -o test.xlsx ",将文件下载到当前目录.( test.xlsx 为自定义的文件名称 ) 3.
网上有大把现成的代码,不过有点小小的瑕疵 例如目前最流行的 正则法: function getArgument(_arg) { var reg = new RegExp("(^|&)"+ name +"=([^&]*)(&|$)"); var r = window.location.search.substr(1).match(reg); if(r!=null)return unescape(r[2]); return ""