This is a function that adds data and stores it in local storage. how do i stop it from storing duplicate data
const WishlistHandler = (video, id) => {
console.log({ video })
console.log({ id })
let mylist = ls('list')
let itemGet;
let a = video
if (mylist !== null) {
itemGet = ls.get('list')
if (!itemGet.includes(video)) {
itemGet.push(video)
ls.set('list', itemGet)
SetWishList(itemGet)
}
} else {
console.log("not same")
ls.set('list', [video])
}
}
Depending on the type of your array element you can do this a couple of ways:
const data = [1,2,3,4,5,6,7,8,9,10]
const addDataIfNotPresent = (arr,val) => arr.includes(val) ? arr : [...arr, val]
console.log(addDataIfNotPresent(data,5))
console.log(addDataIfNotPresent(data,0))
console.log(addDataIfNotPresent(data,1))
console.log(addDataIfNotPresent(data,2))
console.log(addDataIfNotPresent(data,11))
console.log(addDataIfNotPresent(data,-1))const data = [
{id: 1, value: '1'},
{id: 2, value: '2'},
{id: 3, value: '3'},
{id: 4, value: '4'},
{id: 5, value: '5'},
{id: 6, value: '6'},
{id: 7, value: '7'},
{id: 8, value: '8'},
]
const addDataIfNotPresent = (arr, obj) => arr.find(el => el.id === obj.id) ? arr : [...arr, obj]
console.log(addDataIfNotPresent(data, {id: 2, value: '2'}))
console.log(addDataIfNotPresent(data, {id: 3, value: '3'}))
console.log(addDataIfNotPresent(data, {id: 4, value: '4'}))
console.log(addDataIfNotPresent(data, {id: 10, value: '10'}))
console.log(addDataIfNotPresent(data, {id: 11, value: '11'}))It will depend on what makes your entry unique, let's say you have an objects {'1' : "panda.mp4", '2' : "monkey.mp4"} and you want to make sure that adding ('panda.mp4', '1'). won't work, this code can help you.
In this case, I consider the id as the element that makes the entry unique. Based on this, you can customize and make it work as you need.
const WishlistHandler = (video, id) => {
let mylist = JSON.parse(localStorage.getItem('list'))
if (mylist !== null) {
if (!Object.keys(mylist).includes(id)) {
localStorage.setItem('list', JSON.stringify({...mylist, [id]: video}))
}
} else {
localStorage.setItem('list', JSON.stringify({[id]: video}))
}
}