Merge branch 'layui:main' into main

src/modules/upload.js

@@ -194,14 +194,15 @@ layui.define('layer' , function(exports){
       layui.each(items, function(index, file){
         var formData = new FormData();
         
-        formData.append(options.field, file);
-        
         //追加额外的参数
         layui.each(options.data, function(key, value){
           value = typeof value === 'function' ? value() : value;
           formData.append(key, value);
         });
         
+        //最后添加 file 到表单域
+        formData.append(options.field, file);
+        
         //提交文件
         var opts = {
           url: options.url