I set the array in onchange method and I see it in the console with console.log("array =",array) with all elemets but when I want to delete the duplicate element with Array.from(new Set(array)) method in the update method , I find error in the console ( cant access lexical declaration Array before initialization ) !
const [array, setArray] = useState([]);
const update = (e) =>{
e.preventDefault(); console.log("array =",array); // = [ 1, 1, 2, 2, 51, 51 ]
if( array !==undefined){
const Array = Array.from(new Set(array)); // error } }
setarticlesolde((pre) => {
setArray((pre) => [pre.articleId]);
return [... pre];
})
It workin when I change
const Array = Array.from(new Set(array));
to
var arr =0; arr = Array.from(new Set(array));
you cant use Array like variable because it already defined as existe function in javascript(React.js)
Simply change your code to const arr = Array.from(new Set(array)). Array is js inner variable.