ajax2.0之拖拽上傳
阿新 • • 發佈:2018-10-11
mage 上傳 margin || tee tlist text fun spa
index.html
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title></title> <style media="screen"> * {margin:0; padding:0; list-style: none} .box {width:400px; height:200px; background:#CCC; border:1px solid black; line-height:200px; position:absolute; left:50%; top:50%; margin-left:-200px; margin-top:-100px; text-align:center; display:none;} .img_list {overflow:hidden;} .img_list li {float:left; width:200px; height:200px; border:3px solid #666; margin:10px; position:relative;} .img_list li img {width:100%; height:100%;} .img_list li .del_btn {position:absolute; right:0; top:0;} </style> <script> window.onload=function (){ let oUl=document.querySelector(‘.img_list‘); let oBox=document.querySelector(‘.box‘); let timer; document.addEventListener(‘dragover‘, (ev)=>{ clearTimeout(timer); oBox.style.display=‘block‘; timer=setTimeout(function (){ oBox.style.display=‘none‘; }, 300); ev.preventDefault(); },false); oBox.addEventListener(‘dragenter‘, ()=>{ oBox.innerHTML=‘請松手‘; }, false); oBox.addEventListener(‘dragleave‘, ()=>{ oBox.innerHTML=‘請把文件拖到這兒‘; }, false); oBox.addEventListener(‘drop‘, (ev)=>{ Array.from(ev.dataTransfer.files).forEach(file=>{ if(!file.type.startsWith(‘image/‘)){ return; } let reader=new FileReader(); reader.onload=function (){ let oLi=document.createElement(‘li‘); oLi.file=file; oLi.innerHTML=‘<img src="a.png" ><a href="javascript:;" class="del_btn">刪除</a>‘; let oImg=oLi.children[0]; oImg.src=this.result; let oBtnDel=oLi.children[1]; oBtnDel.onclick=function (){ oUl.removeChild(oLi); }; oUl.appendChild(oLi); }; reader.readAsDataURL(file); }); ev.preventDefault(); }, false); //真的上傳 let oBtnUpload=document.querySelector(‘#btn_upload‘); oBtnUpload.onclick=function (){ let data=new FormData(); Array.from(oUl.children).forEach(li=>{ data.append(‘f1‘, li.file); }); // let oAjax=new XMLHttpRequest(); //POST oAjax.open(‘POST‘, `http://localhost:8080/api`, true); oAjax.send(data); oAjax.onreadystatechange=function (){ if(oAjax.readyState==4){ if(oAjax.status>=200 && oAjax.status<300 || oAjax.status==304){ alert(‘成功‘); }else{ alert(‘失敗‘); } } }; }; }; </script> </head> <body> <ul class="img_list"> <!--<li> <img src="a.png" > <a href="javascript:;" class="del_btn">刪除</a> </li> <li> <img src="b.png" > <a href="javascript:;" class="del_btn">刪除</a> </li>--> </ul> <input type="button" name="" value="上傳" id="btn_upload"> <div class="box"> 請把文件拖到這兒 </div> </body> </html>
ajax2.0之拖拽上傳