I am trying to add a new property to an object which is part of an array of objects. The main array looks like this:
0: {key: 'Fruits', props: Array(22)}
1: {key: 'Dried', props: Array(1)}
2: {key: 'Fresh', props: Array(1)}
3: {key: 'Exotic', props: Array(6)}
4: {key: 'Nuts', props: Array(6)}
What I want to modify is an object inside props key. It is when clicking upon a certain object that matches the name that new property should be added. So my code looks like this:
let updatedFruitsArr = [];
const fruitsArr = [...getFruitsFromLocalStorge()];
// modify the fruits array in order to add a new key to the
// object that matches the name selected
fruitsArr.forEach((fruits) => {
updatedFruitsArr.push({
...fruits,
props: [...fruits.props].map((fruit) => {
if (fruit.name === fruitName) {
return {
...fruit,
isInCart: true
};
} else {
return fruit
}
}),
});
});
However, every time updatedFruitsArr returns the original array without that property added. Could you please tell me what I am doing wrong? Thank you
You don't need to create a new array and use .forEach and .push, you can just use .map:
const fruits = [
{
key: 'Fruits',
props: [
{
name: 'Apple'
},
{
name: 'Orange'
},
{
name: 'Pear'
}
]
},
{
key: 'Nuts',
props: [
{
name: 'Cashew'
},
{
name: 'Peanuts'
}
]
}
];
const newFruits = fruits.map(fruitType => {
return {
...fruitType,
props: fruitType.props.map(fruit => {
if(fruit.name === 'Apple'){
return {
...fruit,
isInCart: true
}
} else {
return {
...fruit
}
}
})
}
});
console.log(newFruits);