diff --git a/index.js b/index.js
index df92628..22476fb 100644
--- a/index.js
+++ b/index.js
@@ -1,55 +1,55 @@
 /* global hexo */
-var assign = require('object-assign');
+var assign = require('object-assign')
 
-if (true === hexo.config.neat_enable) {
-    // HTML minifier
-    hexo.config.neat_html = assign({
-        enable: true,
-        logger: true,
-        exclude: [],
-        ignoreCustomComments: [/^\s*more/],
-        removeComments: true,
-        removeCommentsFromCDATA: true,
-        collapseWhitespace: true,
-        collapseBooleanAttributes: true,
-        removeEmptyAttributes: true,
-        minifyJS: true,
-        minifyCSS: true,
-    }, hexo.config.neat_html);
+if (hexo.config.neat_enable === true) {
+  // HTML minifier
+  hexo.config.neat_html = assign({
+    enable: true,
+    logger: true,
+    exclude: [],
+    ignoreCustomComments: [/^\s*more/],
+    removeComments: true,
+    removeCommentsFromCDATA: true,
+    collapseWhitespace: true,
+    collapseBooleanAttributes: true,
+    removeEmptyAttributes: true,
+    minifyJS: true,
+    minifyCSS: true
+  }, hexo.config.neat_html)
 
-    // Css minifier
-    hexo.config.neat_css = assign({
-        enable: true,
-        logger: true,
-        exclude: ['*.min.css']
-    }, hexo.config.neat_css);
+  // Css minifier
+  hexo.config.neat_css = assign({
+    enable: true,
+    logger: true,
+    exclude: ['*.min.css']
+  }, hexo.config.neat_css)
 
-    // Js minifier
-    hexo.config.neat_js = assign({
-        enable: true,
-        mangle: true,
-        logger: true,
-        output: {},
-        compress: {},
-        exclude: ['*.min.js']
-    }, hexo.config.neat_js);
+  // Js minifier
+  hexo.config.neat_js = assign({
+    enable: true,
+    mangle: true,
+    logger: true,
+    output: {},
+    compress: {},
+    exclude: ['*.min.js']
+  }, hexo.config.neat_js)
 
-    // html, css, js compression
-    hexo.config.neat_gzip = assign({
-        enable: true,
-        logger: true,
-    }, hexo.config.neat_gzip);
+  // html, css, js compression
+  hexo.config.neat_gzip = assign({
+    enable: true,
+    logger: true
+  }, hexo.config.neat_gzip)
 
-    // html, css, js compression
-    hexo.config.neat_brotli = assign({
-        enable: true,
-        logger: true,
-    }, hexo.config.neat_brotli);
+  // html, css, js compression
+  hexo.config.neat_brotli = assign({
+    enable: true,
+    logger: true
+  }, hexo.config.neat_brotli)
 
-    var filter = require('./lib/filter');
-    hexo.extend.filter.register('after_render:html', filter.logic_html);
-    hexo.extend.filter.register('after_render:css', filter.logic_css);
-    hexo.extend.filter.register('after_render:js', filter.logic_js);
-    hexo.extend.filter.register('after_generate', filter.logic_gzip);
-    hexo.extend.filter.register('after_generate', filter.logic_brotli);
+  var filter = require('./lib/filter')
+  hexo.extend.filter.register('after_render:html', filter.logicHtml)
+  hexo.extend.filter.register('after_render:css', filter.logicCss)
+  hexo.extend.filter.register('after_render:js', filter.logicJs)
+  hexo.extend.filter.register('after_generate', filter.logicGzip)
+  hexo.extend.filter.register('after_generate', filter.logicBrotli)
 }
diff --git a/lib/filter.js b/lib/filter.js
index 1456a22..93abf19 100644
--- a/lib/filter.js
+++ b/lib/filter.js
@@ -1,187 +1,193 @@
 /* global hexo */
-'use strict';
-var CleanCSS = require('clean-css'),
-    UglifyJS = require('uglify-js'),
-    Htmlminifier = require('html-minifier').minify,
-    streamToArray = require('stream-to-array');
-var Promise = require('bluebird');
-var minimatch = require('minimatch');
-var zlib = require('zlib');
-var br = require('iltorb');
+'use strict'
+var CleanCSS = require('clean-css')
 
-function logic_html(str, data) {
-    var hexo = this,
-        options = hexo.config.neat_html;
-    // Return if disabled.
-    if (false === options.enable) return;
+var UglifyJS = require('uglify-js')
 
-    var path = data.path;
-    var exclude = options.exclude;
-    if (exclude && !Array.isArray(exclude)) exclude = [exclude];
+var Htmlminifier = require('html-minifier').minify
 
-    if (path && exclude && exclude.length) {
-        for (var i = 0, len = exclude.length; i < len; i++) {
-            if (minimatch(path, exclude[i], {matchBase: true})) return str;
-        }
+var streamToArray = require('stream-to-array')
+var Promise = require('bluebird')
+var minimatch = require('minimatch')
+var zlib = require('zlib')
+var br = require('iltorb')
+
+function logicHtml (str, data) {
+  var hexo = this
+
+  var options = hexo.config.neat_html
+  // Return if disabled.
+  if (options.enable === false) return
+
+  var path = data.path
+  var exclude = options.exclude
+  if (exclude && !Array.isArray(exclude)) exclude = [exclude]
+
+  if (path && exclude && exclude.length) {
+    for (var i = 0, len = exclude.length; i < len; i++) {
+      if (minimatch(path, exclude[i], { matchBase: true })) return str
     }
+  }
 
-    var result = Htmlminifier(str, options);
-    var saved = ((str.length - result.length) / str.length * 100).toFixed(2);
-    if (options.logger) {
-        var log = hexo.log || console.log;
-        log.log('Minify the html: %s [%s saved]', path, saved + '%');
-    }
-    return result;
+  var result = Htmlminifier(str, options)
+  var saved = ((str.length - result.length) / str.length * 100).toFixed(2)
+  if (options.logger) {
+    var log = hexo.log || console.log
+    log.log('Minify the html: %s [%s saved]', path, saved + '%')
+  }
+  return result
 }
 
-function logic_css(str, data) {
-    var hexo = this,
-        options = hexo.config.neat_css;
-    // Return if disabled.
-    if (false === options.enable) return;
+function logicCss (str, data) {
+  var hexo = this
 
-    var path = data.path;
-    var exclude = options.exclude;
-    if (exclude && !Array.isArray(exclude)) exclude = [exclude];
+  var options = hexo.config.neat_css
+  // Return if disabled.
+  if (options.enable === false) return
 
-    if (path && exclude && exclude.length) {
-        for (var i = 0, len = exclude.length; i < len; i++) {
-            if (minimatch(path, exclude[i], {matchBase: true})) return str;
-        }
+  var path = data.path
+  var exclude = options.exclude
+  if (exclude && !Array.isArray(exclude)) exclude = [exclude]
+
+  if (path && exclude && exclude.length) {
+    for (var i = 0, len = exclude.length; i < len; i++) {
+      if (minimatch(path, exclude[i], { matchBase: true })) return str
     }
+  }
 
-    return new Promise(function (resolve, reject) {
-        new CleanCSS({level:2}).minify(str, function (err, result) {
-            if (err) return reject(err);
-            var saved = ((str.length - result.styles.length) / str.length * 100).toFixed(2);
-            resolve(result.styles);
-            if (options.logger) {
-                var log = hexo.log || console.log;
-                log.log('Minify the css: %s [%s saved]', path, saved + '%');
+  return new Promise(function (resolve, reject) {
+    new CleanCSS({ level: 2 }).minify(str, function (err, result) {
+      if (err) return reject(err)
+      var saved = ((str.length - result.styles.length) / str.length * 100).toFixed(2)
+      resolve(result.styles)
+      if (options.logger) {
+        var log = hexo.log || console.log
+        log.log('Minify the css: %s [%s saved]', path, saved + '%')
+      }
+    })
+  })
+}
+
+function logicJs (str, data) {
+  var hexo = this
+
+  var options = hexo.config.neat_js
+  // Return if disabled.
+  if (options.enable === false) return
+
+  var path = data.path
+  var exclude = options.exclude
+  if (exclude && !Array.isArray(exclude)) exclude = [exclude]
+
+  if (path && exclude && exclude.length) {
+    for (var i = 0, len = exclude.length; i < len; i++) {
+      if (minimatch(path, exclude[i], { matchBase: true })) return str
+    }
+  }
+
+  // uglifyjs doesn't like unsupported options
+  delete options.enable
+  delete options.exclude
+  var jsLogger = options.logger
+  delete options.logger
+
+  var result = UglifyJS.minify(str, options)
+  var saved = ((str.length - result.code.length) / str.length * 100).toFixed(2)
+  if (jsLogger) {
+    var log = hexo.log || console.log
+    log.log('Minify the js: %s [%s saved]', path, saved + '%')
+  }
+  return result.code
+}
+
+function logicGzip () {
+  var hexo = this
+
+  var options = hexo.config.neat_gzip
+  // Return if disabled.
+  if (options.enable === false) return
+
+  const route = hexo.route
+  const routeList = route.list()
+
+  return Promise.all(routeList.filter(path => (path.endsWith('.html') || path.endsWith('.js') || path.endsWith('.css'))).map(path => {
+    return new Promise((resolve, reject) => {
+      // Grab all assets using hexo router
+      const assetPath = route.get(path)
+      let assetTxt = ''
+      // Extract the content
+      assetPath.on('data', (chunk) => (assetTxt += chunk))
+      assetPath.on('end', () => {
+        if (assetTxt.length) {
+          // gzip compress using highest level
+          zlib.gzip(assetTxt, { level: zlib.Z_BEST_COMPRESSION }, (err, Input) => {
+            if (!err) {
+              // Save the compressed file to .gz
+              route.set(path + '.gz', Input)
+              // Logging
+              var saved = ((assetTxt.length - Input.toString().length) / assetTxt.length * 100).toFixed(2)
+              if (options.logger) {
+                var log = hexo.log || console.log
+                log.log('Gzip-compressed %s [%s saved]', path, saved + '%')
+              }
+              resolve(assetTxt)
+            } else {
+              reject(err)
             }
-        });
-    });
-}
-
-function logic_js(str, data) {
-    var hexo = this,
-        options = hexo.config.neat_js;
-    // Return if disabled.
-    if (false === options.enable) return;
-
-    var path = data.path;
-    var exclude = options.exclude;
-    if (exclude && !Array.isArray(exclude)) exclude = [exclude];
-
-    if (path && exclude && exclude.length) {
-        for (var i = 0, len = exclude.length; i < len; i++) {
-            if (minimatch(path, exclude[i], {matchBase: true})) return str;
+          })
         }
-    }
-
-    //uglifyjs doesn't like unsupported options
-    delete options.enable;
-    delete options.exclude;
-    var js_logger = options.logger;
-    delete options.logger;
-
-    var result = UglifyJS.minify(str, options);
-    var saved = ((str.length - result.code.length) / str.length * 100).toFixed(2);
-    if (js_logger) {
-        var log = hexo.log || console.log;
-        log.log('Minify the js: %s [%s saved]', path, saved + '%');
-    }
-    return result.code;
+      })
+    })
+  }))
 }
 
-function logic_gzip() {
-    var hexo = this,
-        options = hexo.config.neat_gzip;
-    // Return if disabled.
-    if (false === options.enable) return;
+function logicBrotli () {
+  var hexo = this
 
-    var gz_logger = options.logger;
-    const route = hexo.route;
-    const routeList = route.list();
-    
-    return Promise.all(routeList.filter(path => (path.endsWith('.html') || path.endsWith('.js') || path.endsWith('.css'))).map(path => {
-      return new Promise((resolve, reject) => {
-        // Grab all assets using hexo router
-        const assetPath = route.get(path);
-        let assetTxt = '';
-        // Extract the content
-        assetPath.on('data', (chunk) => (assetTxt += chunk));
-        assetPath.on('end', () => {
-          if (assetTxt.length) {
-            // gzip compress using highest level
-            zlib.gzip(assetTxt, {level:zlib.Z_BEST_COMPRESSION}, (err, buffer) => {
-              if (!err) {
-                // Save the compressed file to .gz
-                route.set(path + '.gz', buffer);
-                //Logging
-                var saved = ((assetTxt.length - buffer.toString().length) / assetTxt.length * 100).toFixed(2);
-                if (gz_logger) {
-                    var log = hexo.log || console.log;
-                    log.log('Gzip-compressed %s [%s saved]', path, saved + '%');
-                }
-                resolve(assetTxt);
-              } else {
-                reject(err);
+  var options = hexo.config.neat_brotli
+  // Return if disabled.
+  if (options.enable === false) return
+
+  const route = hexo.route
+  const routeList = route.list()
+
+  return Promise.all(routeList.filter(path => (path.endsWith('.html') || path.endsWith('.js') || path.endsWith('.css'))).map(path => {
+    return new Promise((resolve, reject) => {
+      // Grab all assets using hexo router
+      const assetPath = route.get(path)
+      let assetTxt = ''
+      // Extract the content
+      assetPath.on('data', (chunk) => (assetTxt += chunk))
+      assetPath.on('end', () => {
+        if (assetTxt.length) {
+          // Input has to be buffer for brotli
+          var input = new Buffer.from(assetTxt, 'utf-8')
+          // brotli compress using highest level
+          br.compress(input, { quality: br.BROTLI_MAX_QUALITY }, (err, output) => {
+            if (!err) {
+              // Save the compressed file to .br
+              route.set(path + '.br', output)
+              // Logging
+              var saved = ((input.length - output.toString().length) / input.length * 100).toFixed(2)
+              if (options.logger) {
+                var log = hexo.log || console.log
+                log.log('Brotli-compressed %s [%s saved]', path, saved + '%')
               }
-            });
-          }
-        });
-      });
-    }));
-}
-
-function logic_brotli() {
-    var hexo = this,
-        options = hexo.config.neat_brotli;
-    // Return if disabled.
-    if (false === options.enable) return;
-
-    var br_logger = options.logger;
-    const route = hexo.route;
-    const routeList = route.list();
-    
-    return Promise.all(routeList.filter(path => (path.endsWith('.html') || path.endsWith('.js') || path.endsWith('.css'))).map(path => {
-      return new Promise((resolve, reject) => {
-        // Grab all assets using hexo router
-        const assetPath = route.get(path);
-        let assetTxt = '';
-        // Extract the content
-        assetPath.on('data', (chunk) => (assetTxt += chunk));
-        assetPath.on('end', () => {
-          if (assetTxt.length) {
-            // Input has to be buffer for brotli
-            var buffer = new Buffer.from(assetTxt, "utf-8");
-            // brotli compress using highest level
-            br.compress(buffer, {quality:br.BROTLI_MAX_QUALITY}, (err, output) => {
-              if (!err) {
-                // Save the compressed file to .br
-                route.set(path + '.br', output);
-                //Logging
-                var saved = ((buffer.length - output.toString().length) / buffer.length * 100).toFixed(2);
-                if (br_logger) {
-                    var log = hexo.log || console.log;
-                    log.log('Brotli-compressed %s [%s saved]', path, saved + '%');
-                }
-                resolve(assetTxt);
-              } else {
-                reject(err);
-              }
-            });
-          }
-        });
-      });
-    }));
+              resolve(assetTxt)
+            } else {
+              reject(err)
+            }
+          })
+        }
+      })
+    })
+  }))
 }
 
 module.exports = {
-    logic_html: logic_html,
-    logic_css: logic_css,
-    logic_js: logic_js,
-    logic_gzip: logic_gzip,
-    logic_brotli: logic_brotli
-};
+  logicHtml: logicHtml,
+  logicCss: logicCss,
+  logicJs: logicJs,
+  logicGzip: logicGzip,
+  logicBrotli: logicBrotli
+}