Created javascript style (markdown)

javascript-style.md

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+JavaScript Style
+================
+
+Please see [feross/standard's RULES.md](https://github.com/feross/standard/blob/master/RULES.md) for a general guide of form to follow for javascript. One of the fundamental concepts is the elimination of semicolons but there are some caveats.
+
+Beside that:
+
+- functions and class methods should be in camelCase
+- pure functions should be in their own file and have their own unit tests
+- named imports should be broken into multiple lines
+- files that export classes, static or instantaible, should have filenames UpperCamelCase
+- import/includes of classes should be in UpperCamelCase, even if they are not
+- do not use `var` anymore (we have `const` and `let`)
+
+
+## TIPS
+
+- if you're using `let` you may want to reconsider your function design
+
+This is ugly, why the JS folks do not want to improve this potentially awesome expression is beyond me.
+
+```javascript
+const select = (function (x) => {
+  switch(x) {
+    case 'A': return 0
+    case 'B': return 1
+    default:  return 9
+  }
+})(y)
+```