Filter array objet 2 dimensions by text

I need to filter a two dimensional array in JS, I know there is the accumulator could you explain me how to do it please

let listItems = [
  {
    category: false,
    items: [
      { value: 1, label: 'Disabled'},
      { value: 2, label: 'Carole Poland'},
      { value: 3, label: 'Wanda Howard'},
    ],
  },
  {
    category: 'Suggestions',
    items: [
      { value: 4, label: 'Robin Counts'},
      { value: 5, label: 'Alex Doe'},
    ],
  },
  {
    category: 'Batiment',
    items: [
      { value: 6, label: 'Vincent Howi'},
      { value: 7, label: 'Alex Zusk'},
    ],
  }
];

Wanted result after filter by label ‘Alex’

let listItems = [
    { category: 'Batiment', items: [{ value: 7, label: 'Alex Zusk'}] },
    { category: 'Suggestions', items: [{ value: 5, label: 'Alex Doe'}] }
];


<input 
  type="text" 
  id="myInput"
  onkeyup="myFunction()" 
  placeholder="Search.." 
/>

function myFunction() {
     input = document.getElementById("myInput");
   filter = input.value.toUpperCase();
   console.log('Search :', filter);
}

https://jsfiddle.net/z03gjdpo/4/

>Solution :

• Using Array#reduce, iterate over the array while updating a list.
• In every iteration, using Array#filter and String#includes, get items whose label includes the target string. If the latter exist, push a new object to the accumulator with category and filtered items.

const listItems = [
  {
    category: false,
    items: [ { value: 1, label: 'Disabled'}, { value: 2, label: 'Carole Poland'}, { value: 3, label: 'Wanda Howard'} ]
  },
  {
    category: 'Suggestions',
    items: [ { value: 4, label: 'Robin Counts'}, { value: 5, label: 'Alex Doe'} ]
  },
  {
    category: 'Batiment',
    items: [ { value: 6, label: 'Vincent Howi'}, { value: 7, label: 'Alex Zusk'} ]
  }
];
const target = 'Alex';

const filteredListItems = listItems.reduce((list, { category, items = [] }) => {
  const filteredItems = items.filter(({ label }) => label.includes(target));
  if(filteredItems.length > 0) { list.push({ category, items: filteredItems }); }
  return list;
}, []);

console.log(filteredListItems);