Script #3

script.js

const filterTodoList = (word) =>{
    return todos.filter((item) => {
        return item.desc.toLowerCase().includes(word.toLowerCase());
    });
};

searchInput.addEventListener('input', (event) => {
    event.preventDefault();

    if (event.target.value.length >= 3){
        arr = filterTodoList(event.target.value);
        refreshTodoList(arr);
    } else {
        refreshTodoList(todos);
    }
});