diff --git a/async.js b/async.js
index 1ba6b3b..99dbae1 100644
--- a/async.js
+++ b/async.js
@@ -1,15 +1,12 @@
 let postcss = require('postcss')
 
-let parse = require('./parser')
+let parser = require('./parser')
 let processResult = require('./process-result')
 
 module.exports = function async(plugins) {
   let processor = postcss(plugins)
   return async input => {
-    let result = await processor.process(input, {
-      parser: parse,
-      from: undefined
-    })
+    let result = await processor.process(input, { parser, from: undefined })
     return processResult(result)
   }
 }
diff --git a/objectifier.js b/objectifier.js
index bd47fd2..6cb9d88 100644
--- a/objectifier.js
+++ b/objectifier.js
@@ -24,11 +24,7 @@ let UNITLESS = {
 }
 
 function atRule(node) {
-  if (typeof node.nodes === 'undefined') {
-    return true
-  } else {
-    return process(node)
-  }
+  return node.nodes === undefined ? true : process(node)
 }
 
 // From https://github.com/hyperz111/fast-camelcase-css
@@ -43,7 +39,7 @@ function camelcase(property) {
 
   // Microsoft vendor-prefixes are uniquely cased
   if (property.startsWith('-ms-')) {
-    property = property.substring(1)
+    property = property.slice(1)
     index = property.indexOf('-')
   }
 
@@ -51,24 +47,23 @@ function camelcase(property) {
   let result = ''
 
   do {
-    result += property.substring(cursor, index) + property[index + 1].toUpperCase()
+    result += property.slice(cursor, index) + property[index + 1].toUpperCase()
     cursor = index + 2
     index = property.indexOf('-', cursor)
   } while (index !== -1)
 
-  return result + property.substring(cursor)
+  return result + property.slice(cursor)
 }
 
 function process(node, options = {}) {
   let name
   let result = {}
-  let { stringifyImportant } = options
 
   node.each(child => {
     if (child.type === 'atrule') {
       name = '@' + child.name
       if (child.params) name += ' ' + child.params
-      if (typeof result[name] === 'undefined') {
+      if (result[name] === undefined) {
         result[name] = atRule(child)
       } else if (Array.isArray(result[name])) {
         result[name].push(atRule(child))
@@ -81,7 +76,7 @@ function process(node, options = {}) {
         for (let i in body) {
           let object = result[child.selector]
           if (
-            stringifyImportant &&
+            options.stringifyImportant &&
             typeof object[i] === 'string' &&
             object[i].endsWith('!important')
           ) {
@@ -96,7 +91,7 @@ function process(node, options = {}) {
         result[child.selector] = body
       }
     } else if (child.type === 'decl') {
-      if (child.prop[0] === '-' && child.prop[1] === '-') {
+      if (child.prop.startsWith('--')) {
         name = child.prop
       } else if (child.parent && child.parent.selector === ':export') {
         name = child.prop
@@ -104,11 +99,9 @@ function process(node, options = {}) {
         name = camelcase(child.prop)
       }
       let value = child.value
-      if (!isNaN(child.value) && UNITLESS[name]) {
-        value = parseFloat(child.value)
-      }
+      if (!isNaN(child.value) && UNITLESS[name]) value = parseFloat(child.value)
       if (child.important) value += ' !important'
-      if (typeof result[name] === 'undefined') {
+      if (result[name] === undefined) {
         result[name] = value
       } else if (Array.isArray(result[name])) {
         result[name].push(value)
diff --git a/parser.js b/parser.js
index 3cac15d..e6df6e8 100644
--- a/parser.js
+++ b/parser.js
@@ -27,28 +27,30 @@ let UNITLESS = {
   'stroke-width': true
 }
 
-let { fromCharCode } = String;
+let { fromCharCode } = String
 
 function dashify(str) {
-  let result = '';
-  let i = 0;
-  let len = str.length;
-  let code;
+  if (str === 'cssFloat') return 'float'
 
-  if (str[0] === 'm' && str[1] === 's') result += fromCharCode(45); // '-'
+  let result = ''
+  let i = 0
+  let len = str.length
+  let code
+
+  if (str.startsWith('ms')) result += fromCharCode(45) // '-'
 
   for (; i < len; i++) {
-    code = str[i].charCodeAt(0);
+    code = str[i].charCodeAt(0)
 
     if (code > 64 && code < 91) {
-      result += fromCharCode(45) + fromCharCode(code + 32);
-      continue;
+      result += fromCharCode(45) + fromCharCode(code + 32)
+      continue
     }
 
-    result += fromCharCode(code);
+    result += fromCharCode(code)
   }
 
-  return result;
+  return result
 }
 
 function decl(parent, name, value) {
@@ -59,15 +61,10 @@ function decl(parent, name, value) {
   }
 
   if (typeof value === 'number') {
-    if (value === 0 || UNITLESS[name]) {
-      value = value.toString()
-    } else {
-      value += 'px'
-    }
+    value = value.toString()
+    if (value !== '0' && !UNITLESS[name]) value += 'px'
   }
 
-  if (name === 'css-float') name = 'float'
-
   if (IMPORTANT.test(value)) {
     value = value.replace(IMPORTANT, '')
     parent.push(postcss.decl({ prop: name, value, important: true }))
@@ -89,7 +86,7 @@ function parse(obj, parent) {
   let name, node, value
   for (name in obj) {
     value = obj[name]
-    if (value === null || typeof value === 'undefined') {
+    if (value == null) {
       continue
     } else if (name[0] === '@') {
       let parts = name.match(/@(\S+)(\s+([\W\w]*)\s*)?/)
diff --git a/process-result.js b/process-result.js
index 215a95c..4128876 100644
--- a/process-result.js
+++ b/process-result.js
@@ -3,8 +3,7 @@ let objectify = require('./objectifier')
 module.exports = function processResult(result) {
   if (console && console.warn) {
     result.warnings().forEach(warn => {
-      let source = warn.plugin || 'PostCSS'
-      console.warn(source + ': ' + warn.text)
+      console.warn((warn.plugin || 'PostCSS') + ': ' + warn.text)
     })
   }
   return objectify(result.root)
diff --git a/sync.js b/sync.js
index 668a9ef..90c6337 100644
--- a/sync.js
+++ b/sync.js
@@ -1,12 +1,12 @@
 let postcss = require('postcss')
 
-let parse = require('./parser')
+let parser = require('./parser')
 let processResult = require('./process-result')
 
 module.exports = function (plugins) {
   let processor = postcss(plugins)
   return input => {
-    let result = processor.process(input, { parser: parse, from: undefined })
+    let result = processor.process(input, { parser, from: undefined })
     return processResult(result)
   }
 }