目前我正在测试flutter web与默认的应用程序模板我创建了一个新项目，并使用
构建web目标`flutter build web`
将所有文件放在本地服务器的子目录中，因此我可以从
访问它们说http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou
但是我无法正确加载flutter应用程序。
我得到以下错误
Access to XMLHttpRequest at 'http://127.0.0.1:43110/assets/FontManifest.json' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
Uncaught Failed to load asset at "assets/FontManifest.json" (0)
at Object.a (http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:3657:3)
at http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:15533:9
at WK.a (http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:5208:72)
at WK.$2 (http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:26450:23)
at VZ.$2 (http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:26445:25)
at UN.Sx (http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:27054:42)
at UN.Sw (http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:27056:32)
at fm.Qv (http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:26578:23)
at Tl.$0 (http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:26725:36)
at Object.n9 (http://127.0.0.1:43110/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/main.dart.js:5324:76)
a @ main.dart.js:3657
$0 @ main.dart.js:27022
aec @ main.dart.js:5356
aen @ main.dart.js:5358
$1 @ main.dart.js:26383
af9 @ main.dart.js:3738
(anonymous) @ main.dart.js:3746
childList (async)
$1 @ main.dart.js:26390
a42 @ main.dart.js:5363
nB @ main.dart.js:5420
lW @ main.dart.js:26656
d1 @ main.dart.js:26573
nb @ main.dart.js:26566
iB @ main.dart.js:26567
(anonymous) @ main.dart.js:3781
$1 @ main.dart.js:29789
af9 @ main.dart.js:3738
(anonymous) @ main.dart.js:3746
error (async)
Ii @ main.dart.js:29019
it @ main.dart.js:29015
uz @ main.dart.js:4897
yO @ main.dart.js:29783
b3 @ main.dart.js:7256
aae @ main.dart.js:7243
(anonymous) @ main.dart.js:15510
(anonymous) @ main.dart.js:5208
$2 @ main.dart.js:26450
a8 @ main.dart.js:5194
Rn @ main.dart.js:15542
ca @ main.dart.js:15504
(anonymous) @ main.dart.js:22768
(anonymous) @ main.dart.js:5208
$2 @ main.dart.js:26450
a8 @ main.dart.js:5194
S9 @ main.dart.js:22802
fe @ main.dart.js:22762
(anonymous) @ main.dart.js:6968
(anonymous) @ main.dart.js:5208
$2 @ main.dart.js:26450
a8 @ main.dart.js:5194
Gl @ main.dart.js:6970
(anonymous) @ main.dart.js:6931
(anonymous) @ main.dart.js:5208
$2 @ main.dart.js:26450
a8 @ main.dart.js:5194
nz @ main.dart.js:6942
afD @ main.dart.js:6919
(anonymous) @ main.dart.js:13935
(anonymous) @ main.dart.js:5208
$2 @ main.dart.js:26450
a8 @ main.dart.js:5194
Xj @ main.dart.js:13946
(anonymous) @ main.dart.js:50140
(anonymous) @ main.dart.js:50134
dartProgram @ main.dart.js:50137
(anonymous) @ main.dart.js:50140
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main.dart.js:7244
GET http://127.0.0.1:43110/assets/FontManifest.json net::ERR_FAILED
更新web/index.html中的<base href="/">标签
在你的例子中:<base href="/1ETE7PzFgfVdJ9YBhoG2uq1g5jwZ6N9Dou/">
您应该在yourProjectDirectory/web/index.html上注释<base href="/">这行． 之后，在终端运行flutter build web，然后复制文件夹yourProjectDirectory/build/web上的任何目录，你想在服务器上。它将在您的地址在浏览器中工作。