Feature: Add Prettier.

.prettierignore

@@ -0,0 +1,12 @@
+# List files or directories below to ignore them when running prettier
+# More information: https://prettier.io/docs/en/ignore.html
+#
+
+node_modules
+.localdevserver
+.vscode
+
+*.txt
+
+test/index.js
+*.png

.prettierrc

@@ -0,0 +1,30 @@
+{
+	"trailingComma": "none",
+	"useTabs": true,
+	"bracketSameLine": true,
+	"bracketSpacing": true,
+	"tabWidth": 2,
+	"singleQuote": true,
+	"overrides": [
+		{
+			"files": ".prettierrc",
+			"options": { "parser": "json", "printWidth": 80 }
+		},
+		{
+			"files": "**/*.js",
+			"options": { "parser": "babel", "useTabs": false, "printWidth": 80 }
+		},
+		{
+			"files": "doc*/**/*.html",
+			"options": {
+				"parser": "html",
+				"useTabs": true,
+				"tabWidth": 2,
+				"printWidth": 150,
+				"htmlWhitespaceSensitivity": "ignore",
+				"singleQuote": false
+			}
+		}
+	],
+	"$schema": "https://json.schemastore.org/prettierrc"
+}