Magento 2: add body css class on checkout page step-wise

If you need to set a CSS class on change checkout stepwise then follow the below instructions.

You need to override progress-bar.js from

vendor/magento/module-checkout/view/frontend/web/js/view

1	vendor/magento/module-checkout/view/frontend/web/js/view

to your current theme and replace the below js function.

/**
 * @param {Object} item
 * @return {*|Boolean}
 */
isProcessed: function (item) {
 var itemCode = item.code;
 if (itemCode == "shipping") {
 jQuery('body').addClass('payment-step');
 jQuery('body').removeClass('shipping-step');
 } else {
 jQuery('body').addClass('shipping-step');
 jQuery('body').removeClass('payment-step');
 }
 return stepNavigator.isProcessed(item.code);
}

/**

* @param {Object} item

* @return {*|Boolean}

isProcessed: function (item) {

var itemCode = item.code;

if (itemCode == "shipping") {

jQuery('body').addClass('payment-step');

jQuery('body').removeClass('shipping-step');

} else {

jQuery('body').addClass('shipping-step');

jQuery('body').removeClass('payment-step');

}

return stepNavigator.isProcessed(item.code);

}

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