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Custom Embedded JavaScript Functions: Difference between revisions
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Custom Embedded JavaScript Functions (view source)
Revision as of 12:01, 12 September 2022
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* To obtain a photo of the currently viewing user using their integrated camera and then embed it in the document | * To obtain a photo of the currently viewing user using their integrated camera and then embed it in the document | ||
* To connect via REST API to an external service to fetch additional data for the contextual record | * To connect via REST API to an external service to fetch additional data for the [[Document Contexts|contextual record]] | ||
* To import an external library and display custom elements/components that are rendered by the external library (say a table, chart, image slider etc) | * To import an external library and display custom elements/components that are rendered by the external library (say a table, chart, image slider etc) | ||
* To patch-fix a bug in 3B Docs | * To patch-fix a bug in 3B Docs | ||
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Just like [[Custom Value Formatting|custom value formatters]], when you create a Function Expression, you are basically creating a JavaScript function. This JavaScript function has access to the global context and thus to the [[Current User Navigator Object|user’s navigator object]], the application variables & collections and much more. | Just like [[Custom Value Formatting|custom value formatters]], when you create a Function Expression, you are basically creating a JavaScript function. This JavaScript function has access to the global context and thus to the [[Current User Navigator Object|user’s navigator object]], the application variables & collections and much more. | ||
The difference between [[Custom Value Formatting|custom value formatters]] and Function Expressions lies in the fact that [[Custom Value Formatting|custom value formatters]] can only be applied to a specific [[Merge Fields and Tags|merge tag]], whereas [[Custom Embedded JavaScript Functions|Function Expressions]] form their own independent [[Merge Fields and Tags|merge tags]]. | The difference between [[Custom Value Formatting|custom value formatters]] and Function Expressions lies in the fact that [[Custom Value Formatting|custom value formatters]] can only be applied to a specific [[Merge Fields and Tags|merge tag]], whereas [[Custom Embedded JavaScript Functions|Function Expressions]] form their own independent [[Merge Fields and Tags|merge tags]]. | ||
You must always return a string value – this return value will be your “transformation” of the [[Merge Fields and Tags|merge tag]]. | Furthermore, here are a few considerations: | ||
* You must always return a string value – this return value will be your “transformation” of the [[Merge Fields and Tags|merge tag]]. | |||
* You can access the element that will be inserted into the body of the document via the "element" variable that will be passed to your custom function | |||
== Examples == | == Examples == | ||