我有一个简单的 useEffect 函数设置,带有括号,如下所示:
useEffect(() => {
console.log('hello')
getTransactions()
}, [])
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但是,当我运行我的应用程序时,它会在控制台中打印两个hello。知道为什么吗?
即使我添加这样的内容,仍然会打印两个hello。
const [useEffectCalled, setUseEffectCalled] = useState<Boolean>(false)
useEffect(() => {
console.log('hello')
if (!useEffectCalled) {
getTransactions()
}
setUseEffectCalled(true)
}, [])
Run Code Online (Sandbox Code Playgroud) 如何使用ethers包使用自定义节点 url 创建新的 Provider?
想做这样的事情:
const provider = new ethers.providers.Web3Provider('http://my-node.com')
Run Code Online (Sandbox Code Playgroud) 我有一个 nextjs 和 firebase 应用程序设置,具有功能,并且所有内容都可以在本地完美运行和构建。但是,当我构建并部署到 Vercel 时,我在 Vercel 控制台中收到以下构建错误:
类型错误:找不到模块“firebase-functions”或其相应的类型声明。
这是我的应用程序/功能 package.json
{
"name": "functions",
"scripts": {
"lint": "eslint --ext .js,.ts .",
"build": "tsc",
"serve": "npm run build && firebase emulators:start --only functions",
"shell": "npm run build && firebase functions:shell",
"start": "npm run shell",
"deploy": "firebase deploy --only functions",
"logs": "firebase functions:log"
},
"engines": {
"node": "16"
},
"main": "lib/index.js",
"dependencies": {
"axios": "^0.26.1",
"firebase": "^9.6.11",
"firebase-admin": "^10.0.2",
"firebase-functions": "^3.18.0"
},
"devDependencies": {
"@typescript-eslint/eslint-plugin": "^5.12.0",
"@typescript-eslint/parser": "^5.12.0",
"eslint": "^8.9.0",
"eslint-config-google": …Run Code Online (Sandbox Code Playgroud) I'm trying to pass a file (image) from my Reactjs app to Firebase Functions to then upload it to Pinata using their Node.js sdk but my cloud function keeps returning: ERR_INVALID_ARG_TYPE
Is it possible to pass a file to Firebase Functions?
I need to eventually convert it to a readable stream to use Pinata.