On my shopify site (Debut theme), when a user clicks the add to cart button without choosing a size, it gives this message: "Required parameter missing or invalid: items".
I would like to reword this message to something more friendly, like "Please pick a size".
How would I achieve this? I'm assuming its a liquid issue but not sure if could also be javascript related. Thanks.
41 Answer
Open the assets/theme.js and search for response.responseJSON.description. It should be withing the _addItemToCart method. Add the following .replace("Required parameter missing or invalid: items", "Please pick a size"). So after this change the whole method should look like the below:
_addItemToCart: function(data) { var params = { url: '/cart/add.js', data: $(data).serialize(), dataType: 'json' }; $.post(params) .done( function(item) { this._hideErrorMessage(); this._setupCartPopup(item); }.bind(this) ) .fail( function(response) { this.$previouslyFocusedElement.focus(); var errorMessage = response.responseJSON ? response.responseJSON.description.replace("Required parameter missing or invalid: items", "Please pick a size") : theme.strings.cartError; this._showErrorMessage(errorMessage); this._handleButtonLoadingState(false); }.bind(this) );
},
