store data in localstorage javascript
var testObject = { 'one': 1, 'two': 2, 'three': 3 };
// Put the object into storage
localStorage.setItem('testObject', JSON.stringify(testObject));
// Retrieve the object from storage
var retrievedObject = localStorage.getItem('testObject');
console.log('retrievedObject: ', JSON.parse(retrievedObject));javascript save data to local storage
// Store
localStorage.lastname = "Smith";
// Retrieve
document.getElementById("result").innerHTML = localStorage.lastname;
// Remove
localStorage.removeItem("lastname");save data to local storage
//useEffect(function (){}, []) this hook takes function as its first argument and an array/dependency as
//which if the [] arrray is empty it runs once, meaning on initial render
useEffect(() => {
const previousData = JSON.parse(localStorage.getItem("Todos"));
setTodos(previousData);
},[])
//and if something changes in the dependency's value in this case inputText the function that is passed as the first argument runs each time
useEffect(() => {
localStorage.setItem('Todos', JSON.stringify(Todos));
}, [inputText])Copyright © 2021 Codeinu
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