Given the SFRA Controller below:01varserver=require( ' server ' );02varcache=require( ' */cartridge/scripts/middleware/cache ' );0304server.

At line 05,viewDatareceives a value but is never declared withvar. Consequently, it isn ' t established as a local variable in the middleware function ' s lexical scope. A debugger stopped inside that function therefore won ' t present it as the expected locally declared variable in the local inspection context.

B2C Commerce controllers are CommonJS JavaScript modules, and Salesforce emphasizes that module-scoped/private data and explicitly defined variables should be used rather than relying on unintended globals. Salesforce also recommends avoiding global variables in controller implementations.

The corrected line would be:

varviewData={name: ' my string ' };

Option B is incorrect becausecache.applyDefaultCacheis valid SFRA middleware and is routinely applied to GET routes. Option C is also false:viewDatais not a reserved B2C Script identifier. In fact, SFRA itself commonly uses the term ViewData for the data model passed to templates.

The defect is therefore ordinary JavaScript variable declaration/scope behavior rather than an SFRA caching or reserved-word issue.

Study Guide reference:Application Development — SFRA controllers, CommonJS JavaScript, variable scope, middleware, and Script Debugger troubleshooting.

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