Reviews needed for translations

If you're able to review an article, feel free to do so and give your feedback as a comment in this issue. You may also fork the repository, fix the issues in the article and create a pull request.

Articles that need reviews:

| Article | Review 1 | Review 2 |
| :--- | :---: | :---: |
| [An Introduction to JavaScript](https://github.com/javascript-tutorial/fi.javascript.info/blob/master/1-js/01-getting-started/1-intro) |✅|❌|
| [Manuals and specifications](https://github.com/javascript-tutorial/fi.javascript.info/blob/master/1-js/01-getting-started/2-manuals-specifications) |❌|❌|
| [Code editors](https://github.com/javascript-tutorial/fi.javascript.info/blob/master/1-js/01-getting-started/3-code-editors) |❌|❌|
[Developer console](https://github.com/javascript-tutorial/fi.javascript.info/blob/master/1-js/01-getting-started/4-devtools) |❌|❌|
| [Hello, world!](https://github.com/javascript-tutorial/fi.javascript.info/blob/master/1-js/02-first-steps/01-hello-world) |❌|❌|
| [Code structure](https://github.com/javascript-tutorial/fi.javascript.info/blob/master/1-js/02-first-steps/02-structure) |❌|❌|
| [The modern mode, "use strict"](https://github.com/javascript-tutorial/fi.javascript.info/blob/master/1-js/02-first-steps/03-strict-mode) |❌|❌|
| [Variables](https://github.com/javascript-tutorial/fi.javascript.info/blob/master/1-js/02-first-steps/04-variables) |❌|❌|

Start by opening the listed Finnish tutorial articles, beginning with “Manuals and specifications” and “Code editors,” and compare them with the linked source content. Review the translation for each selected article and leave feedback in this issue, or make corrections in a fork and submit a pull request. Done means the reviewed articles have useful feedback or a proposed correction.

Written by the indexing model from the issue text.