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
}
}]
};