cms封面404问题

plugs/think-plugs-cms/src/view/article/form.html

@@ -27,7 +27,7 @@
         <div class="layui-form-item">
             <label class="layui-form-label">缩略图图片</label>
             <div class="layui-input-block">
-                <input type="hidden" onchange="$(this).nextAll('img').attr('src', this.value)" name="thumb" value='{$vo.thumb|default=""}' placeholder="请上传缩略图图片" class="layui-input layui-hide">
+                <input type="hidden" name="thumb" value='{$vo.thumb|default=""}' placeholder="请上传缩略图图片" class="layui-input layui-hide">
                 <div class="layui-btn-container">
                     <a data-file="btn" data-type="bmp,png,jpeg,jpg" data-field="thumb" class="input-group-addon layui-btn layui-btn-active">
                         <i class="layui-icon layui-icon-upload"></i>
@@ -70,5 +70,12 @@
                 });
             })
         }
+        $('[name="thumb"]').on('change', function () {
+            if (this.value) {
+                $(this).nextAll('img').attr('src', this.value).show()
+            } else {
+                $(this).nextAll('img').hide()
+            }
+        }).trigger('change');
     })
 </script>