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docs/_howto/typescript-swc.md

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 title: "Case study: real world dependency stubbing"
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-Sinon is a simple tool that only tries to do a few things and do them well: creating and injecting test doubles (spies, fakes, stubs) into objects. Unfortunately, in todays world of build pipelines, complex tooling, transpilers and different module systems, doing the simple thing quickly becomes difficult. This article is a detailed step-by-step guide on how one can approach the typical issues that arise and various approaches for debugging and solving them. The real-world case chosen is using Sinon along with [SWC][swc-project], running tests written in TypeScript in the [Mocha test runner][mocha] and wanting to replace dependencies in this ([SUT][sut]). The essence is that there are always _many_ approaches for achieving what you want. Some require tooling, some can get away with almost no tooling, some are general in nature (not specific to SWC for instance) and some are a blend. This means you can usually make some of these approaches work for other combinations of tooling as well, once you understand what is going on. Draw inspiration from the approach and figure out what works for you!
+Sinon is a simple tool that only tries to do a few things and do them well: creating and injecting test doubles (spies, fakes, stubs) into objects. Unfortunately, in todays world of build pipelines, complex tooling, transpilers and different module systems, doing the simple thing quickly becomes difficult.
+
+This article is a detailed step-by-step guide on how one can approach the typical issues that arise and various approaches for debugging and solving them. The real-world case chosen is using Sinon along with [SWC][swc-project], running tests written in TypeScript in the [Mocha test runner][mocha] and wanting to replace dependencies in this ([SUT][sut]). The essence is that there are always _many_ approaches for achieving what you want. Some require tooling, some can get away with almost no tooling, some are general in nature (not specific to SWC for instance) and some are a blend. This means you can usually make some of these approaches work for other combinations of tooling as well, once you understand what is going on. Draw inspiration from the approach and figure out what works for you!
 
 ## On Typescript
 
-The Sinon project does not explicitly list TypeScript as a supported target environment. That does not mean Sinon will not run, just that there are so many complications that we cannot come up with guides on figuring out the details for you on every system :) Typescript is a super-set of EcmaScript (JavaScript) and can be transpiled in a wide variety of ways into EcmaScript, both by targetting different runtimes (ES5, ES2015, ES2023, etc) and module systems (CommonJS, ESM, AMD, ...). Some transpiler are closer to the what the standard TypeScript compiler produces, some are laxer in various ways and additionally they have all kinds of options to tweak the result. This is indeed complex, so before you dig yourself done in this matter, it is essential that you try to figure out what the resulting code _actually_ looks like. As you will see in this guide, adding a few sprinkles of `console.log` with the output of [`Object.getOwnPropertyDescriptor(object, propname)`][get-own] is usually sufficient to understand what is going on!
+The Sinon project does not explicitly list TypeScript as a supported target environment. That does not mean Sinon will not run, just that there are so many complications that we cannot come up with guides on figuring out the details for you on every system :)
+
+Typescript is a super-set of EcmaScript (JavaScript) and can be transpiled in a wide variety of ways into EcmaScript, both by targetting different runtimes (ES5, ES2015, ES2023, etc) and module systems (CommonJS, ESM, AMD, ...). Some transpiler are closer to the what the standard TypeScript compiler produces, some are laxer in various ways and additionally they have all kinds of options to tweak the result. This is indeed complex, so before you dig yourself done in this matter, it is essential that you try to figure out what the resulting code _actually_ looks like.
+
+As you will see in this guide, adding a few sprinkles of `console.log` with the output of [`Object.getOwnPropertyDescriptor(object, propname)`][get-own] is usually sufficient to understand what is going on!
 
 All code and working setups described in this guide are on [Github][master-branch] and links to the correct branch can be found in each section.