I have tried some solutions that came by, on this link particularily...
I tried changing value inside my TodosContext.js file.. which didn't work, too.. One more thing that I have tried is to call useContext() function from another component, that didn't work neither..
Here's my code. App.js:
import React, { useState, useContext } from 'react';
import TodoList from './components/TodoList';
import NewTodo from './components/NewTodo';
import { TodosProvider, TodosContext } from './components/contextapi/TodosContext';
function App() {
const [input, setInput] = useState('');
const [todos, setTodos] = useContext(TodosContext);
const _handleInput = (e) => {
setInput(e.target.value)
}
const _todoAdd = (e) => {
if (e.key === 'Enter') {
setTodos(
[...todos, { content: input, id: Date.now(), completed: false }]
)
setInput('')
}
}
const _todoRemove = (id) => {
const newTodos = todos.filter(todo => todo.id !== id)
setTodos(newTodos)
}
return (
<div>
<header>
<h3>To-Do Manager | Context API</h3>
</header>
<TodosProvider>
<NewTodo newTodo={_todoAdd} handleInput={_handleInput} newVal={input} />
<TodoList todos={todos} />
</TodosProvider>
</div>
);
}
export default App;
TodosContext.js:
import React, { useState, createContext } from 'react';
export const TodosContext = createContext()
export const TodosProvider = ({ children }) => {
const [todos, setTodos] = useState([]);
return (
<TodosContext.Provider value={[todos, setTodos]}>{children}</TodosContext.Provider>
)
}
TodoList.js:
import React, { useContext } from 'react';
import Todo from './Todo';
import RemoveTodoFromList from './RemoveTodoFromList';
import { TodosContext } from './contextapi/TodosContext'
function TodoList() {
const [todos, setTodos] = useContext(TodosContext);
return (
<div>
{todos.map(todo => (
<div>
<Todo key={todo.id} todo={todo} />
</div>
))}
</div>
)
}
export default TodoList
I'm really struggling with this one, I spent whole day figuring out what went wrong.. Thanks!
export const TodosContext = createContext([[],() => {}]). This sets a default value on creation.createContextor at least specify it so you won't stumble into those annoying errors :) glad i could help