JAVASCRIPT

count array filter javascript

const falseNb = items.filter(e => e.status === 'false').length;

count array filter javascript

const items = [
  { color:'red', type:'2', status:'true' }, 
  { color:'red', type:'2', status:'false' } 
];

const falseNb = items.reduce((n, e) => e.status === 'false' ? n+1 : n, 0);

console.log(falseNb) // => 1