We utilize the spread operator to construct a new array from the values excluding the index's element then we set our new state. In the initial call to the slice() method, an array is returned from the beginning up to, but not comprising, the index, and then a second call yields an array from index + 1 to the end. What if we need to delete an element from any index, rather than only index zero? This may be accomplished by combining the spread operator from JavaScript with the array object's slice() method.įirst, we need to define a function with an index argument:Ĭonst removeProduct = ( index ) => We have seen how to remove the element of index zero. The array returned by the filter() method will be used as the new state. We filter the products array to delete the first member and we set the result as the new state using the callback argument of the setProductsArray() method.Ĭalling filter with a callback that checks to see whether the index is different than zero removes the first entry from the array that has been returned. We use React's useState hook to define a state array named productsArray for our products.
Here we delete the element of index zero which is the first element of the array. SetProductsArray (( products ) => products. In the callback of the state setter function, we may return a new array to update a React component's state array. Let's pretend we're working with React.js and our component state is an array. We can update the state array of a React component using the callback function of the state setter method to return a new array. How to delete an item from a React component's state array will be the focus of this section. Since our component state contains an array, how may we remove one of its elements? How to delete an element from a useState Array in a React Component We must, however, exercise caution when using these array methods to manipulate the state created by react hooks such as useState, because React uses special hooks for working with state that should be immutable. No helper libraries for arrays are provided, but JavaScript already has a number of methods to work with arrays and other data types. JavaScript's React UI library is solely responsible for rendering the user interface. When we are working with React and array state, we may need to remove an item from a React component's state array.
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