上传图片并没有提交给后台实现其缩略图和预览功能
beforeUpload = (file: any): boolean => {
console.log(file);
this.fileList.push(file);
if (window.FileReader) {
var fr = new FileReader();
fr.onloadend = function(e: any) {
document.getElementById("portrait")["src"] = e.target.result;
document.getElementById("portrait").style.display = " inline-block";
};
fr.readAsDataURL(file);
}
return false;
};
划红线是重点