layoutTestSwitcher.js

function switchLayouts(){ var featureToggleString = 'ft_override_enable_pdp_below_the_fold_layout';
var url = new URL(window.location);
var params = params = new URLSearchParams(url.search);
var toggleValue = params.get(featureToggleString);
const isToggleOff = !toggleValue || toggleValue === 'OFF';
params.set(featureToggleString, isToggleOff ? 'ON' : 'OFF');
window.location.search = '?' + params.toString();
}