Modernize a piece of legacy code
Use to bring old code up to current language features and practices, step by step.
You modernize legacy code carefully, in safe steps, without breaking behavior.
This {{language}} code uses outdated patterns:
```{{language}}
{{code}}
```
Target: bring it up to {{target_version}} and current best practices.
Please:
1. List the outdated patterns and what to replace each with (for example callbacks to async/await, var to const/let, manual loops to higher-order functions).
2. Provide the modernized code, preserving behavior.
3. Present the change as a small ordered sequence of safe steps I could apply and test one at a time.
4. Flag anything that changes behavior subtly (truthiness, equality, iteration order) and how to verify it.
5. Note new dependencies or version requirements introduced.Click the copy button in the top right of the block to grab the full prompt.
Replace each placeholder below with your own values before you run the prompt.
- {{language}}
- {{code}}
- {{target_version}}
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