Salesforce B2C Commerce 24.7 > Developing Your Site > Development Components > Scripts > Script Programming > Understanding Server-Side JavaScript

Using Input and Output Variables

Using standard JavaScript comment techniques, you can declare input and output variable to be used within a script.

Defining Input and Output Variables in Scripts

You pass data into Salesforce B2C Commerce scripts using the @input annotation. You pass data out of a B2C Commerce script using the @output annotation.

Example 1a: Input Variable Definition

In your script file, such as GetDefaultVariant.ds, you define the input variables and save the script file.

*   @input Prod : dw.catalog.Product
*   @input CurrentVariationModel : dw.catalog.ProductVariationModel

The example defines two input variables, Product and CurrentVariationModel, which contain string values. The last part of the variable definition is a description of the variable.

Example 1b: Output Variable Definition

In your script file, such as GetDefaultVariant.ds, you define the output variables and save the script file.

*   @output newProduct : dw.catalog.Product

The example defines an output variable, newProduct , which contains a product object.

Adding Dictionary Bindings

When you have saved the script files with the input and output variables defined, script node pipelet using the script adds a Dictionary Input section to the pipelet properties with the name of the input variables and a Dictionary Output section to the pipelet properties with the names of the output variables.

Example 2: script node dictionary input and output Bindings

You bind values to the parameters by entering a string, a variable name, or an expression.

In the example above, the input variable Prod defined in your script file is bound to the Product variable in the Pipeline Dictionary. The input variable CurrentVariationModel defined in your script file is bound to the Product variable in the Pipeline Dictionary.

Fixing Orphaned Dictionary Bindings

When you bind a value to a parameter, the binding is stored in the pipeline file. If you remove script parameters, the pipeline file sometimes retains bindings for these removed parameters. To correct this, UX Studio checks pipelines and identifies orphaned bindings. The orphaned bindings are reported as Warnings in the Problems and Markers views. You can correct the problem by right-clicking the Warning and selecting the Quick Fix menu option.