grunt-phantomas

Grunt plugin for phantomas

Getting Started

This plugin requires Grunt ~0.4.1

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-phantomas --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:

grunt.loadNpmTasks('grunt-phantomas');

The "phantomas" task

You're looking for a tool that gives you detailed metrics about your site? Great!!! This grunt plugin executes phantomas for you and visualizes the returned metrics in a generated index.html for you. It will keep track of history, so that you can set it up and check reports after every deployment of your site.

Examples of rendered output:

metrics for http://gruntjs.com -> here

I'm still at early stage, but I think you can already work with it. ;)

Overview

In your project's Gruntfile, add a section named phantomas to the data object passed into grunt.initConfig().

grunt.initConfig( {
  phantomas: {
    gruntSite : {
      options : {
        indexPath : './phantomas/',
        options   : {},
        url       : 'http://gruntjs.com/'
      }
    }
  }
} )

Options

options.additionalStylesheet

Type: String|Boolean Default value: false

If you don't like the phantomas default styling and want to customize it, you can set the path to an additional stylesheet, that will be copied and loaded in the generated index.html.

options.indexPath

Type: String Default value: ./phantomas/

A string value that represents the relative path to the place where phantomas will render your metrics. Inside of this folder an index.html, a data folder and an assets folder will be created.

options.numberOfRuns

Type: Number Default value: 5

A numeric value that represents the number of times the phantomas executable will be started. The more times it runs the more reliable metrics become.

options.options

Type: Object Default value: {}

An array that represents possible options for phantomas executable. For more information please check the official api documentation and list of possible parameters. See usage examples later on.

options.url

Type: String Default value: http://gruntjs.com/

A string value that represents the url of the site, which will be analyzed by phantomas.

options.group

Type: Object Default value:

{
  'REQUESTS' : [
    'requests',
    'gzipRequests',
    'postRequests',
    'httpsRequests',
    'notFound',
    'multipleRequests',
    'maxRequestsPerDomain',
    'domains',
    'medianRequestsPerDomain',
    'redirects',
    'redirectsTime',
    'smallestResponse',
    'biggestResponse',
    'smallestLatency',
    'biggestLatency',
    'medianResponse',
    'medianLatency',
    'assetsNotGzipped',
    'assetsWithQueryString',
    'smallImages'
  ],
  'TIMINGS' : [
    'timeToFirstByte',
    'timeToLastByte',
    'timeToFirstCss',
    'timeToFirstJs',
    'timeToFirstImage',
    'fastestResponse',
    'slowestResponse',
    'onDOMReadyTime',
    'onDOMReadyTimeEnd',
    'windowOnLoadTime',
    'windowOnLoadTimeEnd',
    'httpTrafficCompleted',
    'timeBackend',
    'timeFrontend'
  ],
  'HTML' : [
    'bodyHTMLSize',
    'iframesCount',
    'imagesWithoutDimensions',
    'commentsSize',
    'hiddenContentSize',
    'whiteSpacesSize',
    'DOMelementsCount',
    'DOMelementMaxDepth',
    'nodesWithInlineCSS',
    'foo'
  ],
  'JAVASCRIPT' : [
    'eventsBound',
    'documentWriteCalls',
    'evalCalls',
    'jsErrors',
    'consoleMessages',
    'windowAlerts',
    'windowConfirms',
    'windowPrompts',
    'globalVariables',
    'localStorageEntries',
    'ajaxRequests'
  ],
  'DOM' : [
    'DOMqueries',
    'DOMqueriesById',
    'DOMqueriesByClassName',
    'DOMqueriesByTagName',
    'DOMqueriesByQuerySelectorAll',
    'DOMinserts',
    'DOMqueriesDuplicated'
  ],
  'HEADERS' : [
    'headersCount',
    'headersSentCount',
    'headersRecvCount',
    'headersSize',
    'headersSentSize',
    'headersRecvSize'
  ],
  'CACHING' : [
    'cacheHits',
    'cacheMisses',
    'cachePasses',
    'cachingNotSpecified',
    'cachingTooShort',
    'cachingDisabled'
  ],
  'COOKIES' : [
    'cookiesSent',
    'cookiesRecv',
    'domainsWithCookies',
    'documentCookiesLength',
    'documentCookiesCount'
  ],
  'COUNTS & SIZES' : [
    'contentLength',
    'bodySize',
    'htmlSize',
    'htmlCount',
    'cssSize',
    'cssCount',
    'jsSize',
    'jsCount',
    'jsonSize',
    'jsonCount',
    'imageSize',
    'imageCount',
    'webfontSize',
    'webfontCount',
    'base64Size',
    'base64Count',
    'otherCount',
    'otherSize'
  ],
  'JQUERY' : [
    'jQueryOnDOMReadyFunctions',
    'jQuerySizzleCalls'
  ]
}

An object that represents the metrics grouping rendered inside of the generated index.html. You can set up your grouping by just passing another object to this option.

Example:

phantomas : {
  /* https://github.com/stefanjudis/grunt-phantomas */
  grunt : {
    options : {
      indexPath : './phantomas/',
      options   : {
        'timeout' : 30
      },
      url       : 'http://gruntjs.com/',
      group     : {
        'foo' : [ 'cookiesSent' ]
      }
    }
  }
}

This configuration will lead to a rather empty looking rendered index.html. :) Additionally you will be informed, which metrics you missed during the build process.

Output for example:

CHECKING FOR NOT DISPLAYED METRICS.
>> You are currently not displaying the following metrics:
>> requests, gzipRequests, postRequests, httpsRequests, notFound, timeToFirstByte, timeToLastByte, bodySize, contentLength, ajaxRequests, htmlCount, htmlSize, cssCount, cssSize, jsCount, jsSize, jsonCount, jsonSize, imageCount, imageSize, webfontCount, webfontSize, base64Count, base64Size, otherCount, otherSize, cacheHits, cacheMisses, cachePasses, cachingNotSpecified, cachingTooShort, cachingDisabled, consoleMessages, domains, maxRequestsPerDomain, medianRequestsPerDomain, DOMqueries, DOMqueriesById, DOMqueriesByClassName, DOMqueriesByTagName, DOMqueriesByQuerySelectorAll, DOMinserts, DOMqueriesDuplicated, eventsBound, headersCount, headersSentCount, headersRecvCount, headersSize, headersSentSize, headersRecvSize, documentWriteCalls, evalCalls, jQueryOnDOMReadyFunctions, jQuerySizzleCalls, jsErrors, redirects, redirectsTime, assetsNotGzipped, assetsWithQueryString, smallImages, multipleRequests, timeToFirstCss, timeToFirstJs, timeToFirstImage, onDOMReadyTime, onDOMReadyTimeEnd, windowOnLoadTime, windowOnLoadTimeEnd, timeBackend, timeFrontend, httpTrafficCompleted, windowAlerts, windowConfirms, windowPrompts, cookiesRecv, domainsWithCookies, documentCookiesLength, documentCookiesCount, bodyHTMLSize, iframesCount, imagesWithoutDimensions, commentsSize, hiddenContentSize, whiteSpacesSize, DOMelementsCount, DOMelementMaxDepth, nodesWithInlineCSS, globalVariables, localStorageEntries, smallestResponse, biggestResponse, fastestResponse, slowestResponse, smallestLatency, biggestLatency, medianResponse, medianLatency

Usage Examples

Default Options

In this example, the default options are used to fetch metrics of http://gruntjs.com and render the visualized metrics at ./phantomas.

grunt.initConfig({
  phantomas: {
  	yourSite: {}
  }
});

Grunt task options

In this example, custom options are used to fetch metrics of http://yoursite.com and render the visualized metrics at ./yoursite/.

grunt.initConfig( {
  phantomas: {
    yourSite : {
      options : {
        additionalStylesheet : '/Users/foo/bar/custom.css',
        indexPath            : './yoursite/',
        url                  : 'http://yoursite.com/',
        numberOfRuns         : 10
      }
    }
  }
} );

Phantomas options

In this example, the phantomas option is used to set phantomas execution parameters. In this case all external script except the defined ones are blocked by phantomas, what can become really handy, when dealing with a lot of third party scripts that influence your site performance. Additionally phantomas will wait 30 seconds for all resources to be loaded until it quits with the timeout status code 252.

grunt.initConfig( {
  phantomas: {
    yourSite : {
      options : {
        indexPath : './yoursite/',
        options   : {
          'allow-domain' : 'cdn.yoursite.com.br,ajax.googleapis.com',
          'no-externals' : true,
          'timeout'      : 30

        },
        url       : 'http://yoursite.com'
      }
    }
  }
} );

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

Release History

Please check release history at Github. :)

UncommonGoods / grunt-phantomas