xx

project/p0/package.json

@@ -6,9 +6,9 @@
     "@testing-library/jest-dom": "^5.16.1",
     "@testing-library/react": "^11.2.7",
     "@testing-library/user-event": "^12.8.3",
-    "react": "^17.0.2",
-    "react-dom": "^17.0.2",
-    "react-scripts": "4.0.3",
+    "react": "^16.10.2",
+    "react-dom": "^16.10.2",
+    "react-scripts": "3.2.0",
     "web-vitals": "^1.1.2"
   },
   "scripts": {

project/p0/read.text

@@ -1,14 +0,0 @@
-1、npm run eject  暴露webpack
-2、开发环境调试 
-source-map
-=>
-eval-source-map
-
-3、生产环境调试 
-const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
-=》
-const shouldUseSourceMap = true;
-
-source-map
-=>
-eval-source-map