add eslint

.eslintrc.json

@@ -0,0 +1,120 @@
+{
+	"parserOptions": {
+		"ecmaVersion": 6
+	},
+	"rules": {
+		"quotes": [
+			2,
+			"single",
+			{
+				"allowTemplateLiterals": true
+			}
+		],
+		"curly": [
+			2,
+			"all"
+		],
+		"keyword-spacing": [
+			2,
+			{
+				"overrides": {
+					"else": {
+						"before": true
+					},
+					"catch": {
+						"before": true,
+						"after": false
+					}
+				}
+			}
+		],
+		"space-before-blocks": [
+			2,
+			"always"
+		],
+		"wrap-iife": [
+			2,
+			"inside"
+		],
+		"space-before-function-paren": [
+			2,
+			"never"
+		],
+		"one-var": [
+			2,
+			"never"
+		],
+		"vars-on-top": 0,
+		"no-empty": [
+			2,
+			{
+				"allowEmptyCatch": true
+			}
+		],
+		"array-bracket-spacing": [
+			2,
+			"never"
+		],
+		"space-in-parens": [
+			2,
+			"never"
+		],
+		"no-underscore-dangle": 0,
+		"comma-style": [
+			2,
+			"last"
+		],
+		"comma-spacing": [
+			2,
+			{
+				"before": false,
+				"after": true
+			}
+		],
+		"space-unary-ops": [
+			2,
+			{
+				"words": false,
+				"nonwords": false
+			}
+		],
+		"no-multi-spaces": 2,
+		"space-infix-ops": 2,
+		"no-with": 2,
+		"indent": [
+			2,
+			"tab",
+			{
+				"SwitchCase": 1,
+				"FunctionExpression": {
+					"body": 1,
+					"parameters": 1
+				},
+				"MemberExpression": 0
+			}
+		],
+		"no-mixed-spaces-and-tabs": 2,
+		"no-trailing-spaces": 2,
+		"comma-dangle": [
+			2,
+			"never"
+		],
+		"semi": [2, "always"],
+		"brace-style": [
+			2,
+			"1tbs",
+			{
+				"allowSingleLine": true
+			}
+		],
+		"eol-last": 2,
+		"dot-notation": 0,
+		"no-multi-str": 2,
+		"key-spacing": [
+			2,
+			{
+				"afterColon": true
+			}
+		]
+	}
+}