I am using Nextjs and there is a sidebar in which I am trying to get random 5 posts from an array of objects. The defined function is working fine and displaying 5 posts but I am getting a Hydration error showing Prop alt did not match. When I tried to display it on the console the alt value is different.
import Link from 'next/link';
import Image from 'next/image';
import { BlogData } from '../data/blogdata';
function getMultipleRandom() {
const shuffled = [...BlogData].sort(() => 0.5 - Math.random());
return shuffled.slice(0, 5);
}
const Sidebar = () => {
return (
<>
<h2 className='font-roboto text-3xl font-semibold pb-10'>Featured Posts</h2>
{
getMultipleRandom().map((val) => {
return (
<div key={val._id} className='flex flex-col pt-5'>
<div className='w-56 pr-5'><Image src={val.featuredImage} alt={val.alt} width={1200} height={800} className=' rounded-3xl' /></div>
<Link href={`/blog/${val.slug}`}><a><h3 className='text-sm font-poppins font-medium hover:text-[#5836ed] transition-all duration-300'>{val.title}</h3></a></Link>
</div>
);
})
}
</>
)
}
export default Sidebar;
try this code :
import Link from "next/link";
import Image from "next/image";
import { BlogData } from "../data/blogdata";
import { useEffect, useState } from "react";
const Sidebar = () => {
const [shuffled, setShuffled] = useState([]);
const [loading, setLoading] = useState(true); // anyting you want !!!
useEffect(() => {
if (loading) {
const x = [...BlogData].sort(() => 0.5 - Math.random());
setShuffled(x.slice(0, 5));
setLoading(false);
}
}, [loading]);
return (
<>
<h2 className="font-roboto text-3xl font-semibold pb-10">
Featured Posts
</h2>
{loading ? <div>loading ... </div> : shuffled.map((val) => {
return (
<div key={val._id} className="flex flex-col pt-5">
<div className="w-56 pr-5">
<Image
src={val.featuredImage}
alt={val.alt}
width={1200}
height={800}
className=" rounded-3xl"
/>
</div>
<Link href={`/blog/${val.slug}`}>
<a>
<h3 className="text-sm font-poppins font-medium hover:text-[#5836ed] transition-all duration-300">
{val.title}
</h3>
</a>
</Link>
</div>
);
})}
</>
);
};
export default Sidebar;
Related
Here is my React component. The hook I am trying to get to work is useGetNotesQuery.
On initial load of the component, it does not run. If I tab switch, or create a new note, then the hook will be called and the component will update. I don't have this problem with other hooks and I can't seem to figure out what I am doing wrong. I'm still pretty new to react-query. I've verified that when the hook is called on tab switch or the creation of a new note, the correct data is being passed in and the hook works as expected. It just will not run on initial load.
import React, { useState } from 'react';
import useGetNotesQuery from 'hooks/notes/useNotes';
import { useCreateNote } from 'hooks/notes/useCreateNote';
import Note from './Note';
export default function Notes({ projectItemId, itemId, itemType }: any) {
const createNote = useCreateNote();
const {
data: notes,
isLoading,
isError
} = useGetNotesQuery({ projectItemId, itemId, itemType });
const [body, setBody] = useState('');
const createNewNote = async () => {
await createNote.mutateAsync({
body,
projectItemId,
itemId,
itemType
});
setBody('');
};
return (
<section aria-labelledby="notes-title">
{!isLoading && (
<div className="sm:overflow-hidden sm:rounded-lg">
{console.log(notes)}
<div className="divide-y divide-gray-200">
<div className="px-4 py-5 sm:px-6">
<h2
id="notes-title"
className="text-lg font-medium text-gray-900"
>
Notes
</h2>
</div>
<div className="px-4 py-6 sm:px-6">
<ul role="list" className="space-y-8">
{notes?.map((note) => (
<Note key={note.id} note={note} />
))}
</ul>
</div>
</div>
<div className="bg-gray-50 px-4 py-6 sm:px-6">
<div className="flex space-x-3">
{/* <div className="flex-shrink-0">
<img
className="h-10 w-10 rounded-full"
src={user.imageUrl}
alt=""
/>
</div> */}
<div className="min-w-0 flex-1">
<form action="#">
<div>
<label htmlFor="comment" className="sr-only">
About
</label>
<textarea
id="comment"
name="comment"
rows={3}
className="block w-full p-2 rounded-md border-gray-300 shadow-sm focus:border-blue-500 focus:ring-blue-500 sm:text-sm text-black"
placeholder="Add a note"
value={body}
onChange={(e) => setBody(e.target.value)}
/>
</div>
<div className="mt-3">
<button
type="submit"
onClick={(e) => {
e.preventDefault();
createNewNote();
}}
className="inline-flex items-center justify-center rounded-md border border-transparent bg-blue-600 px-4 py-2 text-sm font-medium text-white shadow-sm hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
>
Comment
</button>
</div>
</form>
</div>
</div>
</div>
</div>
)}
</section>
);
}
Here is the hook
import { getNotesById } from './../../queries/notes/get-notes';
import { useQuery } from 'react-query';
function useGetNotesQuery({ projectItemId, itemId, itemType }: any) {
return useQuery('notes', async () => {
if (projectItemId) {
return getNotesById({ projectItemId, itemId, itemType }).then(
(result) => result.data
);
}
});
}
export default useGetNotesQuery;
My _app.tsx file in NextJS
import 'styles/main.css';
import 'styles/chrome-bug.css';
import '#/styles/tailwind.css';
import 'katex/dist/katex.css';
import '../styles/globals.css';
import 'react-datepicker/dist/react-datepicker.css';
import { useEffect, useState } from 'react';
import React from 'react';
import { SessionContextProvider } from '#supabase/auth-helpers-react';
import { createBrowserSupabaseClient } from '#supabase/auth-helpers-nextjs';
import { AppProps } from 'next/app';
import { MyUserContextProvider } from 'utils/useUser';
import type { Database } from 'types_db';
import { SidebarProvider } from 'context/SidebarContext';
import { QueryClient, QueryClientProvider } from 'react-query';
// import { ReactQueryDevtools } from 'react-query/devtools';
import { ThemeProvider } from 'next-themes';
const queryClient = new QueryClient({
defaultOptions: {
queries: {
retry: 3
}
}
});
export default function MyApp({ Component, pageProps }: AppProps) {
const [initialContext, setInitialContext] = useState();
const [supabaseClient] = useState(() =>
createBrowserSupabaseClient<Database>()
);
useEffect(() => {
document.body.classList?.remove('loading');
}, []);
return (
<QueryClientProvider client={queryClient}>
<SessionContextProvider supabaseClient={supabaseClient}>
<MyUserContextProvider initial={initialContext}>
<SidebarProvider>
<ThemeProvider
attribute="class"
enableColorScheme={false}
defaultTheme="light"
>
<Component {...pageProps} />
</ThemeProvider>
{/* <ReactQueryDevtools initialIsOpen={false} /> */}
</SidebarProvider>
</MyUserContextProvider>
</SessionContextProvider>
</QueryClientProvider>
);
}
What do your other hooke return? Your query getNotesById is returning result.data, but the useQuery structure expects a parsed result object, like the example below:
const fetchUsers = async () => {
const res = await fetch("https://jsonplaceholder.typicode.com/users");
return res.json();
};
const response = useQuery("users", fetchUsers);
I am loading data from firebase, so when I refresh, it takes time to load it. And added data are not present in the cart that,s why I am not getting any product in the cart. But I did follow the same process to store user data, and it,s working fine, which means I am getting a registered profile in console. Can anyone suggest me a solution for getting data in the cart?
sending data:
import { motion } from "framer-motion";
import React, { useEffect, useRef, useState } from "react";
import { MdShoppingBasket } from "react-icons/md";
import { actionType } from "../context/reducer";
import { useGlobalState } from "../context/stateProvider";
import NotFound from "../img/NotFound.svg";
const RowContainer = ({ flag, data, scrollValue }) => {
const [{ cartItems }, dispatch] = useGlobalState();
const [items, setItems] = useState([]);
const rowContainer = useRef();
const addToCart = () => {
dispatch({
type: actionType.SET_CARTITEMS,
cartItems: items,
});
localStorage.setItem("cartItems", JSON.stringify(items));
};
useEffect(() => {
addToCart();
}, [items]);
useEffect(() => {
rowContainer.current.scrollLeft += scrollValue;
}, [scrollValue]);
return (
<div
ref={rowContainer}
className={`w-full my-12 flex items-center ${
flag
? "overflow-x-scroll scrollbar-none scroll-smooth"
: "overflow-x-hidden flex-wrap justify-center"
}`}
>
{data && data.length > 0 ? (
data.map((item) => {
const { id, price, imageURL, calories, title } = item;
return (
<div
key={id}
className="w-350 min-w-[300px] md:min-w-[380px] md:my-10 backdrop-blur-lg mx-1 my-2 lg:mx-2 "
>
<div className="w-full flex flex-row items-center justify-between bg-white rounded-lg drop-shadow-lg py-2 px-4 hover:bg-whiteAlpha min-h-[150px]">
<motion.img
whileHover={{ scale: 1.2 }}
src={imageURL}
alt="img"
className="w-30 max-h-40 -mt-8 duration-100 drop-shadow-2xl"
/>
<div className="flex flex-col items-end justify-end gap-4">
<motion.div
whileTap={{ scale: 0.75 }}
className="w-8 h-8 rounded-md bg-orange-500 hover:bg-orange-600 "
onClick={() => setItems([...new Set(cartItems), item])}
>
<MdShoppingBasket className="text-white text-2xl m-1" />
</motion.div>
<div className=" w-full">
<p className="text-gray-800 md:text-lg text-base text-right">
{title}
</p>
<p className="text-sm text-gray-500 text-right">
<span className="text-orange-600">$</span> {price}
</p>
</div>
</div>
</div>
</div>
);
})
) : (
<div className="w-full flex flex-col items-center justify-center">
<img src={NotFound} className="h-340" alt="" />
<p className="text-center my-2 text-xl text-red-500">No data found</p>
</div>
)}
</div>
);
};
export default RowContainer;
fetching data
export const fetchCart = () => {
const cartInfo =
localStorage.getItem("cartItems") !== "undefined"
? JSON.parse(localStorage.getItem("cartItems"))
: localStorage.clear();
return cartInfo ? cartInfo : [];
};
You are clearing your data for no reason
localStorage.getItem("cartItems") !== "undefined"
should be
localStorage.getItem("cartItems") !== undefined
I am trying to have it so that the background of my weather app will change based on the weather condition using nextjs and the current weather data API. But no image is display. This is my Main
import axios from "axios";
import { useState } from "react";
import Weather from "./Weather";
import Spinner from "./Spinner";
import { data } from "autoprefixer";
import Background from "./Background";
const Main = () => {
const [city, setCity] = useState("");
const [weather, setWeather] = useState({});
const [loading, setLoading] = useState(false);
//In celsius -(&units=metric) in fahrenheit -(&units=imperial)
const url = `https://api.openweathermap.org/data/2.5/weather?q=${city}&units=metric&appid=${process.env.NEXT_PUBLIC_WEATHER_KEY}`;
const fetchWeather = (e) => {
e.preventDefault();
setLoading(true);
axios.get(url).then((response) => {
setWeather(response.data);
// console.log(response.data);
});
setCity("");
setLoading(false);
};
if (loading) {
return <Spinner />;
} else {
return (
<div>
{/* Overlay, so we use a self-closing div */}
<div className="absolute top-0 left-0 right-0 bottom-0 bg-black/40 z-[1]" />
<Background
weatherDescription={data.weather ? data.weather[0].main : null}
/>
<div className="relative flex justify-between items-center max-w-[500px] w-full m-auto pt-4 text-white z-10">
<form
onSubmit={fetchWeather}
className="flex justify-between items-center w-full m-auto p-3 bg-transparent border border-gray-300 text-white rounded-2xl"
>
<div>
<input
onChange={(e) => setCity(e.target.value)}
className="bg-transparent border-none text-white focus:outline-none text-2xl"
type="text"
placeholder="Search"
/>
</div>
<button onClick={fetchWeather}>
<BsSearch size={20} />
</button>
</form>
</div>
{weather.main && <Weather data={weather} />}
</div>
);
}
};
And this is the background component
import React from "react";
import img1 from "../public/assets/Rainy weather.jpg";
import img2 from "../imgs/Cloudy Weather.jpg";
function Background(props) {
const images = [
{
name: "Rain",
background: img1,
},
{
name: "Clouds",
background: img2,
},
];
const imgURL = images.find((el) => el.name === props.weatherDescription)
?.background;
return (
<div className="-z-10">
<img
src={imgURL}
className="object-cover w-full min-h-scren"
key={imgURL}
/>
</div>
);
}
export default Background;
I've tried if statements and functions, but nothing is working, I've found this current template that was working with videos, I've tried to change it to use images, but I can't achieve it. I'm fairly new in coding, so I hope someone can help me.
1.header.js
import Image from "next/image";
import {
MenuIcon,
SearchIcon,
ShoppingCartIcon,
} from "#heroicons/react/outline";
import { signIn, signOut, useSession } from "next-auth/react";
import { useRouter } from "next/router";
import { useSelector } from "react-redux";
import { selectItems } from "../slices/basketSlice";
import { Provider } from "react-redux";
function Header() {
const { data: session } = useSession();
const router = useRouter();
const items= useSelector(selectItems);
return (
<header>
<div className="flex items-center bg-amazon_blue p-1 flex-grow py-2">
<div className="mt-2 flex items-center flex-grow sm:flex-grow-0">
<Image
onClick={() => router.push("/")}
src='https://links.papareact.com/f90'
width={150}
height={40}
objectFit="contain"
className="cursor-pointer"
/>
</div>
{/*search bar*/}
<div className="hidden sm:flex items-center h-10 rounded-md flex-grow cursor-pointer bg-yellow-400 hover:bg-yellow-500">
<input className="p-2 h-full w-6 flex-grow flex-shrink rounded-l-md focus:outline-none px-4" type="text" />
<SearchIcon className="h-12 p-4"/>
</div>
<div className="text-white flex items-center text-xs space-x-6 mx-6 whitespace-nowrap">
<div onClick={session ? signIn:signOut} className="link">
<p className="hover:underline">{session ? session.user.name:"signin"}</p>
<p className="font-extrabold md:text-sm">Acount & lists</p>
</div>
<div className=" link">
<p>Returns</p>
<p className="font-extrabold md:text-sm">& orders</p>
</div>
<div onClick={() => router.push("/checkout")} className=" link relative flex items-center">
<span className="absolute top-0 right-0 md:right-10 h-4 w-4 bg-yellow-400 rounded-full text-center text-black font-bold">
{items.length}
</span>
<ShoppingCartIcon className="h-10 "/>
<p className="hidden md:inline font-extrabold md:text-sm mt-2">Bascket</p>
</div>
</div>
</div>
{/*bottom nav*/}
<div className="flex items-center space-x-3 p-2 pl-6 bg-amazon_blue-light text-white text-sm">
<p className="link flex items-center ">
<MenuIcon className="h-6 mr-5"/>
all</p>
<p className="link">featured </p>
<p className="link">new arrival </p>
<p className="link">catalog </p>
<p className="link hidden lg-inline-flex">electronics </p>
</div>
</header>
);
}
export default Header;
bascketslice.js
'''
import { createSlice } from "#reduxjs/toolkit";
const initialState = {
items: [],
};
export const basketSlice = createSlice({
name: "basket",
initialState,
reducers: {
addToBasket: (state, action) => {
state.items = [...state.items, action.payload]
},
removeFromBasket: (state, action) => {},
},
});
export const { addToBasket, removeFromBasket } = basketSlice.actions;
// Selectors - This is how we pull information from the Global store slice
export const selectItems = (state) => state.basket.items;
export default basketSlice.reducer;
'''
product.js
'''
import Image from "next/image";
import {useState} from "react";
import{ StarIcon} from"#heroicons/react/solid";
import Currency from "react-currency-format";
import { useDispatch } from "react-redux";
import {addToBasket} from "../slices/basketSlice";
const MAX_RATING =5;
const MIN_RATING =1;
function Product({id, title, price, description, category,image}) {
const dispatch = useDispatch();
const{rating}= useState(
Math.floor(Math.random() * (MAX_RATING - MIN_RATING +1)) + MIN_RATING
);
const addItemToBascket = () => {
const product = {id, title, price, description, category,image};
// sending the product as an action to bascket slice
dispatch(addToBasket(product))
};
return (
{category}
<Image src={image} height={200} width={200} objectFit="contain" />
<h4 className="flex">{title}</h4>
<div className="flex">
{Array(rating)
.fill()
.map((_, i)=>(
<StarIcon className="h-5 text-yellow-500"/>
))}
</div>
<p className="text-xs my-2 line-clamp-2">{description}</p>
<div className="mb-5">
<Currency quantity={price}/>
</div>
<button onClick={addItemToBascket} className=" mt-auto button">Add to Basket</button>
</div>
);
}
export default Product
'''
store.js
import { configureStore } from "#reduxjs/toolkit";
import basketReducer from "../slices/basketSlice";
export const store = configureStore({
reducer: {
basket: basketReducer,
},
});
_app.js
import { Provider } from 'react-redux'
import { store } from '../app/store'
import '../styles/globals.css'
import { SessionProvider } from "next-auth/react"
const MyApp = ({ Component, pageProps: {session,...pageProps} }) => {
return (
<SessionProvider session={session}>
<Component {...pageProps} />
</SessionProvider>
);
};
export default MyApp
how do i use provider in the code
my repository :- https://github.com/Shadow2389/nmz-2.git
It seems we're both fans of Sonny. Your problem there is that you need to wrap up your App.js in
<Provider>
<SessionProvider session={session}>
<Component {...pageProps} />
</SessionProvider>
</Provider>
But then you'll most likely have a "Hydration error", if so, just remove the "Math.floor(Math.random() * (MAX_RATING - MIN_RATING +1)) + MIN_RATING"
Apparently with the new updates we can no longer use the useState() hook as we used to, so you have 3 options:
1.- Remove the "Math.floor(Math.random() * (MAX_RATING - MIN_RATING +1)) + MIN_RATING"
2.- Set a fixed rating for all products
3.- Set a number for your API (which you cannot, since you are using FakeStoreAPI)
This is due to basic rules of Hooks, since a Random number is "umpredictable", but now I don't know why it has that problem (although you're setting a min and a max)
Here is my reactjs code I want to reverse my data and display on slient side but reverse() is not working what to do..? I don't understand why is this happing with my code..! can anyone help me to reverse my data and display frontend(client side) ....! please help
import React, { useEffect, useState } from "react";
import { getBlogs } from "../helper/coreapicalls";
import ImageHelper from "../helper/ImageHelper";
import { Link } from "react-router-dom";
import Footer from "../Footer/Footer";
const Blog = (blog) => {
const [blogs, setBlog] = useState([]);
const [error, seterror] = useState(false);
useEffect(() => {
loadBlog();
}, []);
const loadBlog = () => {
getBlogs().then((data) => {
if (data.error) {
seterror(data.error);
} else {
setBlog(data);
// console.log(data);
}
});
};
// console.log(blogs);
return (
<div>
<div className="container py-md-5 py-3">
<h1 className="blog_heading">ALL BLOGS</h1>
<div className="row">
{blogs.reverse().map((blog, index) => (
<div className="col-lg-4 col-md-6 col-12" key={index}>
<Link to={`/blog/${blog._id}`} className="Blog_card_link">
<div className="card my-2 shadow">
<ImageHelper blog={blog} />
<div className="card-body">
<h5 className="card-title">
{blog.title.substring(0, 75) + " ..."}
</h5>
<div
className="description"
dangerouslySetInnerHTML={{
__html: blog.description.substring(0, 100) + " ...",
}}
/>
<Link
type="btn"
to={`/blog/${blog._id}`}
className="forMore_btn "
>
For More
</Link>
</div>
</div>
</Link>
</div>
))}
</div>
</div>
<Footer />
</div>
);
};
export default Blog;
Here is image of Frontend ( client side )
enter image description here
Yep! Try reversing your data when you set the state: setBlog(data.reverse()));