I created an empty array in localStorage
localStorage.setItem('items', JSON.stringify([]))
and then fetching that empty array like this :
let fetchedItems = JSON.parse(localStorage.getItem('items'));
After fetching the Array I want to append some objects in the same.
Array of Objects
let objects = [
{
id: '37f60b13-bb3a-4919-beff-239207745343',
body: '1',
},
{
id: '26c5b0fa-b15f-4a50-9a56-5880727a8020',
body: '2',
},
{
id: '37f60b13-bb3a-4919-beff-239207745343',
body: '1',
},
];
The first and last object have same id
Right now what I am doing is, as I don't want to save or append duplicate objects (by id key) in array/localstorage:
function saveItemsInLocalStorage(item) {
let items;
if (localStorage.getItem('items') === null) {
items = [];
} else {
items = JSON.parse(localStorage.getItem('items'));
}
items.push({
id: item.id,
body: item.body,
});
localStorage.setItem('items', JSON.stringify(items));
}
objects.forEach((object) => {
fetchedItems.forEach((fetchedItem) => {
if (fetchedItem.id !== object.id) {
saveItemsInLocalStorage(object)
}
});
});
The above code is not working. I have also tried reduce method.
Note initially array is empty
Let us take an example and try understanding , how you can do it with your code :
let obj = {name:"user",id:1};
let arr = [{name:"user",id:2},{name:"user",id:3}];
let present = false ;
arr.map(val=>{
if(JSON.stringify( {...val})===JSON.stringify({...obj}) )
present = true ;
})
if(present)console.log("The object is present")
else console.log("The object is not present");