diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..faee715
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,15 @@
+[*]
+indent_style = tab
+indent_size = 4
+insert_final_newline = true
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+
+[*.{json,{babel,eslint,stylelint}rc}]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = false
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 0000000..8fc6798
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,56 @@
+module.exports = {
+	env: {
+		browser: true,
+		commonjs: true,
+		es6: true,
+		node: true
+	},
+	extends: [
+		'xo',
+		'xo-react'
+	],
+	parserOptions: {
+		ecmaFeatures: {
+			experimentalObjectRestSpread: true,
+			jsx: true
+		},
+		ecmaVersion:'2017',
+		sourceType: 'module'
+	},
+	plugins: [
+		'react'
+	],
+	ext: [
+		'.js',
+		'.jsx'
+	],
+	rules: {
+		'quotes': ['error', 'single', {'avoidEscape': true}],
+		'operator-linebreak': [
+			'error',
+			'after',
+			{
+				overrides: {
+					'?': 'before',
+					':': 'before'
+				}
+			}
+		],
+		'generator-star-spacing': ['error', 'after'],
+		'react/no-danger': 0,
+		'react/forbid-component-props': 0,
+		'react/no-did-update-set-state': 0,
+		'no-floating-decimal': 0,
+		'spaced-comment': [
+			'error',
+			'always',
+			{
+				"markers": [
+				":",
+				"?:",
+				"::"
+				]
+			}
+		]
+	}
+}
diff --git a/index.js b/index.js
index f9457b8..0597fc0 100644
--- a/index.js
+++ b/index.js
@@ -30,24 +30,24 @@ const allowedPolicies = [
  * @param policies {object} Policies
  * @returns {string}
  */
-function buildCSPString(policies, reportUri){
+function buildCSPString(policies, reportUri) {
 	let cspString = Object.keys(policies).map(policyName => {
-		if(policies[policyName] === true || policies[policyName].length === 0){
+		if (policies[policyName] === true || policies[policyName].length === 0) {
 			return policyName;
 		}
 		return `${policyName} ${policies[policyName].join(' ')}`;
 	}).join('; ');
 
-	if(typeof reportUri === 'string'){
+	if (typeof reportUri === 'string') {
 		cspString += `; report-uri ${reportUri}`;
 	}
 
 	return `${cspString};`;
 }
 
-function csp(params){
+function csp(params) {
 	// params should be an object
-	if(typeof params !== 'object'){
+	if (typeof params !== 'object') {
 		return;
 	}
 
@@ -61,8 +61,8 @@ function csp(params){
 
 	// filter disallowed policies
 	let policies = Object.keys(params.policies).reduce((policies, policyName) => {
-		if(allowedPolicies.indexOf(policyName) > -1){
-			if(params.policies[policyName] !== false){
+		if (allowedPolicies.indexOf(policyName) > -1) {
+			if (params.policies[policyName] !== false) {
 				policies[policyName] = params.policies[policyName];
 			}
 		}
@@ -100,15 +100,14 @@ function resolvePreset(presetName) {
 
 	if (isFullModuleName) {
 		return presetName;
-	} else {
-		return `csp-preset-${presetName}`;
 	}
+	return `csp-preset-${presetName}`;
 }
 
 function requirePreset(presetName) {
 	try {
 		return require(resolvePreset(presetName));
-	} catch(err) {
+	} catch (err) {
 		throw new Error(`CSP preset ${presetName} is not found`);
 	}
 }
@@ -119,7 +118,7 @@ function requirePreset(presetName) {
  * @param {Object} extension Additional policies
  * @returns {Object} Extended policies
  */
-function extendPolicies(original, extension){
+function extendPolicies(original, extension) {
 	const extended = Object.assign(original);
 
 	Object.keys(extension).forEach(policyName => {
@@ -128,9 +127,9 @@ function extendPolicies(original, extension){
 
 		if (origPolicy === undefined) {
 			extended[policyName] = extPolicy;
-		} else if(Array.isArray(extPolicy) && extPolicy.length > 0 && Array.isArray(origPolicy)){
+		} else if (Array.isArray(extPolicy) && extPolicy.length > 0 && Array.isArray(origPolicy)) {
 			extPolicy.forEach(rule => {
-				if(typeof rule === 'string' && origPolicy.indexOf(rule) === -1){
+				if (typeof rule === 'string' && origPolicy.indexOf(rule) === -1) {
 					extended[policyName].push(rule);
 				}
 			});
@@ -147,7 +146,7 @@ function extendPolicies(original, extension){
  * @param nonceId {string} Nonce param id
  * @returns {string} Nonce param
  */
-csp.nonce = function(nonceId){
+csp.nonce = function (nonceId) {
 	return `'nonce-${nonceId}'`;
 };
 
@@ -158,4 +157,4 @@ csp.SELF = "'self'";
 csp.INLINE = "'unsafe-inline'";
 csp.EVAL = "'unsafe-eval'";
 
-module.exports = csp;
\ No newline at end of file
+module.exports = csp;
diff --git a/test/index.test.js b/test/index.test.js
index 00bc816..3d85d6d 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -16,8 +16,8 @@ test('Empty policies', t => {
 test('Disallowed policies', t => {
 	const actual = csp({
 		policies: {
-			'script-src': [ 'test.com', csp.SELF ],
-			'foo-bar-src': [ 'foo', 'bar' ]
+			'script-src': ['test.com', csp.SELF],
+			'foo-bar-src': ['foo', 'bar']
 		}
 	});
 	const expected = "script-src test.com 'self';";
@@ -27,10 +27,10 @@ test('Disallowed policies', t => {
 test('report-uri', t => {
 	const actual = csp({
 		policies: {
-			'script-src': [ csp.SELF ]
+			'script-src': [csp.SELF]
 		},
 		'report-uri': 'https://test.com/cspreport'
-	})
+	});
 	const expected = "script-src 'self'; report-uri https://test.com/cspreport;";
 	t.is(actual, expected);
 });
@@ -80,10 +80,10 @@ test('Presets | resolve', t => {
 test('Extend | new rule', t => {
 	const actual = csp({
 		policies: {
-			'script-src': [ 'myhost.com' ]
+			'script-src': ['myhost.com']
 		},
 		extend: {
-			'script-src': [ 'additional.host.com' ]
+			'script-src': ['additional.host.com']
 		}
 	});
 
@@ -93,10 +93,10 @@ test('Extend | new rule', t => {
 test('Extend | duplicating', t => {
 	const actual = csp({
 		policies: {
-			'script-src': [ 'myhost.com' ]
+			'script-src': ['myhost.com']
 		},
 		extend: {
-			'script-src': [ 'myhost.com' ]
+			'script-src': ['myhost.com']
 		}
 	});
 
@@ -106,10 +106,10 @@ test('Extend | duplicating', t => {
 test('Extend | new policy', t => {
 	const actual = csp({
 		policies: {
-			'script-src': [ 'myhost.com' ]
+			'script-src': ['myhost.com']
 		},
 		extend: {
-			'style-src': [ 'newhost.com' ]
+			'style-src': ['newhost.com']
 		}
 	});
 
@@ -118,7 +118,7 @@ test('Extend | new policy', t => {
 
 test('Nonce', t => {
 	const actual = csp.nonce('vg3eer#E4gEbw34gwq3fgqGQWBWQh');
-	const expected = "'nonce-vg3eer#E4gEbw34gwq3fgqGQWBWQh'"
+	const expected = "'nonce-vg3eer#E4gEbw34gwq3fgqGQWBWQh'";
 	t.is(actual, expected);
 });
 
@@ -127,4 +127,4 @@ test('Constants', t => {
 	t.is(csp.INLINE, "'unsafe-inline'");
 	t.is(csp.EVAL, "'unsafe-eval'");
 	t.is(csp.NONE, "'none'");
-});
\ No newline at end of file
+});