Some features are immediately available through the
ShopifyApp object upon
app.js file's load:
On any form, you can add the attribute
data-shopify-app-submit with the value matching the
message value of one of the title bar buttons. When the button is clicked, it will automatically submit that form:
Modal and Application Communication
For example, if you want to call a function called
performValidation that exists in the context of the modal, from your application, you can invoke the function as follows:
To access the body element:
So if you want to get the body element of your application:
Keep in mind that calling
ShopifyApp.window() by itself might print cross-domain errors on the browser console. Always call functions and elements from the
ShopifyApp.window() to keep the console clean.
For applications requiring print support, the
ShopifyApp object provides print capturing and redirection over
postMessage. This ensures that only the app's iframe will be printed, and not the truncated Shopify admin view.
Configuring a top bar button with the option
print: true will send a print message to the application's iframe.
ShopifyApp.print defaults to simply calling
window.print(). The function can be overridden to execute some custom actions:
app.js script automatically detects if your embedded application is not nested inside an iframe. If not, it will redirect the page into the Shopify admin.
The Shopify admin listens for some special messages to support
500 error pages. The following snippet can be copied to the static error pages and does not require any setup or configuration: