diff --git a/packages/fineui/src/base/layer/layer.popover.js b/packages/fineui/src/base/layer/layer.popover.js
index d7649c389..0f08ac097 100644
--- a/packages/fineui/src/base/layer/layer.popover.js
+++ b/packages/fineui/src/base/layer/layer.popover.js
@@ -198,11 +198,11 @@ export class Popover extends Widget {
     mounted() {
         this.startX = 0;
         this.startY = 0;
-        const bodyDom = getOuterBody();
         this.tracker = new MouseMoveTracker(
             (deltaX, deltaY) => {
-                const W = Widget._renderEngine.createElement(bodyDom).width();
-                const H = Widget._renderEngine.createElement(bodyDom).height();
+                const el = Widget._renderEngine.createElement(getOuterBody())[0];
+                const W = el.clientWidth;
+                const H = el.clientHeight;
                 this.startX += deltaX;
                 this.startY += deltaY;
                 this.element.css({
@@ -246,7 +246,7 @@ export class Popover extends Widget {
     }
 
     _getSuitableWidth(width) {
-        return clamp(width, 0, Widget._renderEngine.createElement(getOuterBody()).width());
+        return clamp(width, 0, Widget._renderEngine.createElement(getOuterBody())[0].clientWidth);
     }
 
     _calculateSize() {
diff --git a/packages/fineui/webpack/webpack.dev.js b/packages/fineui/webpack/webpack.dev.js
index 3b795e02d..1f80646d2 100644
--- a/packages/fineui/webpack/webpack.dev.js
+++ b/packages/fineui/webpack/webpack.dev.js
@@ -6,7 +6,7 @@ const dirs = require("./dirs");
 module.exports = merge(common, {
     mode: "development",
 
-    devtool: "inline-source-map",
+    devtool: "eval-source-map",
 
     output: {
         path: dirs.DEST,
@@ -14,14 +14,14 @@ module.exports = merge(common, {
     },
 
     devServer: {
+        headers: {
+            "Access-Control-Allow-Origin": "*",
+        },
         port: 9001,
         // liveReload: true,
         client: {
             logging: 'error',
-            overlay: {
-                errors: true,
-                warnings: false,
-            },
+            overlay: false,
         },
     }
 });