Responsive breakpoint not working with angular 7

[rootExplorr]

tried almost all option but its not woking ...plz help

slideConfig = {'slidesToShow': 2, 'slidesToScroll': 2, 'autoplay': true, 'autoplaySpeed': 3500, 'infinite': true, 'mobileFirst': true,'respondTo': 'window', 'rows': 1, 'responsive': [{ 'breakpoint': 600, 'settings': {
'slidesToShow': 4, 'slidesToScroll': 4, 'arrows': true, 'dots': true } }] };