Question

用js压缩处理后blob对象怎么上传

Answer 1

function read(){
var fs=document.getElementById('file').files[0];
if(fs){
var reader=new new FileReader();
reader.readAsDataURL(fs);
function li(str){
var obj=document.createElement('li');
obj.innerHTML=str;
document.body.appendChild(obj);
}
reader.onloadstart=function(){
li('开始读取')
}
reader.onprogress=function(){
li('正在读取.....')
}
reader.onload=function(e){
var img=document.createElement('img');
img.src=this.result;
document.body.appendChild(img);
}
reader.onabort=function(){
li('读取中断！！')
}
reader.onerror=function(){
li('读取出现错误！！')
}
reader.onloadend=function(){
li('FileReader读取步骤执行完毕')
}
}
}