Blocks Widget Functions
Add a new function to enable Wix users to perform actions related to the widgets on their websites. For example, a user who has a shopping widget would like to be able to get the address of a certain customer through the function getAddress(customerId) and set the address through the function setAddress(customerId).
To add a new public function to your widget:
-
Click the Widget API
icon. -
Click Add New Public Function or hover over Functions and click the
icon. 
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Add the code for your function in the code editor, where a new function "foo" appears.
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Change the new default name to a meaningful name and edit the function. For example:
When you write your function, make sure to replace the default jsdoc that appears above it with your own one. The user of the widget will see the jsdoc when using the function in a site.
To see how this function is used on a site, learn more about using your Widget API when editing a site.