找不到变量:自我/无法安装firebase [英] Can't find variable : Self / Can't install firebase
问题描述
我在React-Native/Expo中开发一个应用程序，但无法安装Firebase.
I work on an App in React-Native / Expo and I can't install firebase.
-
我在Expo中创建了一个新的Projet:"test2". (没问题)
I create a new Projet in Expo : "test2". (No problem)
我运行"npm install --save firebase"在cmd中，我得到了这个:
I run "npm install --save firebase" in cmd and i got this :
C:\Users\Nils\test>npm install --save firebase
node-pre-gyp install --fallback-to-build --library=static_library
node-pre-gyp WARN Using request for node-pre-gyp https download
Success: "C:\Users\Nils\test\node_modules\grpc\src\node\extension_binary\ node-v57-win32-x64-unknown\grpc_node.node" is installed via remote
npm notice created a lockfile as package-lock.json. You should commit this file.
+ firebase@5.4.2
added 179 packages from 71 contributors, removed 369 packages, updated 643 packages and audited 20975 packages in 440.187s
found 0 vulnerabilities**
- Expo告诉我我没有React-Native，应该使用"npm install" (奇怪的是，新项目在Firebase之前的5分钟前运行良好):
错误:未安装React native.请在您的项目目录中运行npm install.
Error: React native is not installed. Please run npm install in your project directory.
- 我运行"npm install"在cmd中:
C:\Users\Nils\test>npm install
added 260 packages from 160 contributors, updated 4 packages and audited 30579 packages in 121.866s
found 2 vulnerabilities (1 low, 1 high) run `npm audit fix` to fix them, or `npm audit` for details**
5我在Expo中运行了我的App，我得到了: 找不到变量:自我
5 I run my App in Expo and I got : Can't find variable : Self
我不明白为什么它不起作用，我什至不知道问题出在哪里...
I don't understand why it doesn't work, I don't even know where the problem is comming from ...
推荐答案
对于使用expo-cli或XDE创建新项目的用户，您的第一个纱线"或"npm install".这是因为昨天发布了新的"whatwg-fetch" 3.0.0( https://www. npmjs.com/package/whatwg-fetch 23).
因此，您只需要强制对先前版本的依赖即可:
"whatwg-fetch": "^2.0.4"
这意味着将其作为"dependency"放入package.json中.手动添加"yarn add whatwg-fetch@2.0.4".或使用"npm添加whatwg-fetch@2.0.4".
For users creating new project with expo-cli or XDE, you will get red screen "Can’t Find Variable Self" after your first "yarn" or "npm install". This is because of new "whatwg-fetch" 3.0.0 published yesterday (https://www.npmjs.com/package/whatwg-fetch 23).
So you just need to force dependency to previous version:
"whatwg-fetch": "^2.0.4"
It means put it in package.json as "dependency". Manually, with "yarn add whatwg-fetch@2.0.4." Or with "npm add whatwg-fetch@2.0.4".
现在一切都应像魅力一样.
Everything should now work like a charm.
希望这会有所帮助； p
Hope this helps ;p
链接:
https://forums.expo.io/t/cant-find-variable-self/13547
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