Answers for "i have an array of objects. how do i find if a value matches the value in one of my arrays"

find a single element in array of objects javascript

myArray.find(x => x.id === '45').foo;

Search array of objects for existing value

const arrayOfObject = [{ id: 1, name: 'john' }, {id: 2, name: 'max'}];

const checkUsername = obj => obj.name === 'max';

console.log(arrayOfObject.some(checkUsername))