chore(kb): convert placeholders to articles

knowledge base/javascript.md

@@ -0,0 +1,76 @@
+# JavaScript
+
+> TODO
+
+Intro
+
+<!-- Remove this line to uncomment if used
+## Table of contents <!-- omit in toc -->
+
+1. [TL;DR](#tldr)
+1. [Further readings](#further-readings)
+   1. [Sources](#sources)
+
+## TL;DR
+
+<!-- Uncomment if used
+<details>
+  <summary>Setup</summary>
+
+```sh
+```
+
+</details>
+-->
+
+<!-- Uncomment if used
+<details>
+  <summary>Usage</summary>
+
+```sh
+```
+
+</details>
+-->
+
+<!-- Uncomment if used
+<details>
+  <summary>Real world use cases</summary>
+
+```sh
+```
+
+</details>
+-->
+
+```js
+let now = new Date()
+
+let oneYearFromNow = new Date()
+oneYearFromNow.setDate(oneYearFromNow.getDate() + 365)
+
+console.log(now.toISOString())
+console.log(oneYearFromNow.toISOString())
+```
+
+## Further readings
+
+- [Playcode]
+
+### Sources
+
+- [Documentation]
+
+<!--
+  Reference
+  ═╬═Time══
+  -->
+
+<!-- In-article sections -->
+<!-- Knowledge base -->
+<!-- Files -->
+<!-- Upstream -->
+[documentation]: https://developer.mozilla.org/en-US/docs/Web/JavaScript
+
+<!-- Others -->
+[playcode]: https://playcode.io/empty_javascript