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Async JavaScript

作者: Frank Goossens (futtta)

説明

Eliminate Render-blocking Javascript in above-the-fold content with Async Javascript.

Render-blocking Javascript prevents above-the-fold content on your page from being rendered until the javascript has finished loading. This can impact on your page speed and ultimately your ranking within search engines. It can also impact your user’s experience.

Async JavaScript gives you full control of which scripts to add an ‘async’ or ‘defer’ attribute to or to exclude to help increase the performance of your WordPress website.

インストール

Installation is very straightforward:

  1. Upload the zip-file and unzip it in the /wp-content/plugins/ directory
  2. WordPress の「プラグイン」メニューからプラグインを有効化してください
  3. Go to Settings > Async JavaScript menu to load settings page

FAQ

Installation Instructions

Installation is very straightforward:

  1. Upload the zip-file and unzip it in the /wp-content/plugins/ directory
  2. WordPress の「プラグイン」メニューからプラグインを有効化してください
  3. Go to Settings > Async JavaScript menu to load settings page
Which browsers support the ‘async’ and ‘defer’ attributes

The ‘async’ attribute is new in HTML5. It is supported by the following browsers:

  • Chrome
  • IE 10 and higher
  • Firefox 3.6 and higher
  • Safari
  • Opera
Where can I get help?

Async JavaScript is supported via the wordpress.org support forum.

Do you offer professional support/ configuration services?

We offer premium services for Async JavaScript and full web performance optimization services at https://autoptimize.com/

What about CSS?

As the name implies, Async JavaScript is built to enhance JavaScript loading only. Async JavaScript does not have any impact on CSS.

We recommend using the awesome Autoptimize plugin alongside Async JavaScript for CSS optimization.

I want out, how should I remove Async JavaScript?
  • Disable the plugin
  • Delete the plugin

評価

Tried several but this one finally did the trick

When working on my page speed, this was the one piece I had the most challenges with. When I saw this plugin recommended by someone I know, well, I gave it a run and it did exactly what I needed. Great plugin!

Just registered to give 5 stars

Great work here guys! My page speed load decreased from 5 seconds to 2. Never thought that could be so easy. I have almost zero knowledge of script deferring, had to try a few settings, but asyncing did the magic and is totally compatible with my plugins and theme used. Thank you so much.

Very good plugin with awesome results

This plugin includes a wizard dashboard that will help you find the best configuration. It is really good and everything speaks for itself, even if you don’t understand anything of Javascript like I do 🙂

In combination with their other plugins Autoptimize and WP YouTube Lyte + adding GZIP compression and leverage browser caching script to my .htaccess file I managed to get a GTmetrix.com score of 97, impressive!

I recommend all of their three plugins. They will improve your webiste enormously.

Awesome Plugin

This is a great plugin that works well with Automize plugin and if you get stuck (Like I did) the support is on point.

Great then Good then Great again

It made my site faster by quite a bit.
It knocked a few seconds off the page load.
But then I noticed it was blocking some features of BBPress.
The plug-in author put some time aside to help me fix the issues.
So it works and the support was excellent.

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貢献者と開発者

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変更履歴

2.18.06.13

  • fix integration issue with Autoptimize, thx for reporting ElephantDude!

2.18.05.24

  • don’t async (or defer) on AMP-pages
  • disable async/ defer by when ?aj_noptimize=1 is part of the URL

2.18.04.23

  • Re-arrange content on the different tabs of the settings page.
  • Continued refactoring of backend code, no functionality should be affected.
  • Remove all images from the project such as the animated hands and progress bar gif.
  • Remove empty rows that added unnecessary space.
  • Switch buttons to use WordPress button styles.
  • Fix broken Dashboard Widget from 2.18.03.15 and reduce font-size to fix text overflow.
  • Remove all CSS !important declarations for easier CSS styling.
  • Remove inline CSS styles.
  • Switch to a CSS based progress bar.
  • Spell check readme.
  • Remove almost all tables from files.
  • Refactor JavaScript.
  • Add wormeyman as a contributor (thanks man!).

2.18.03.15

  • bugfix: only load asyncjs’ JS & CSS on own settings page as reported by Marat Petrov
  • bugfix: check if jQuery chosen is correctly loaded before using it (based on same report, thanks Marat!)
  • update jQuery Chosen lib
  • small readme tweaks

2.18.03.10

  • ASync JS is now maintained by Frank Goossens (Optimizing Matters), thanks for the great job done David!
  • Moved all Pro features into the standard version.
  • Some code refactoring
  • Made strings ready for translations

2.17.11.15

  • MOD: Added User Agent to GTMetrix requests

2.17.11.03

  • MOD: Check for GTMetrix class existence prior to including class

2.17.10.18

  • FIX: Issue converting array for plugin & theme exclusions

2.17.09.30

  • FIX: Sanitise all $_GET and all $_POST
  • FIX: Add nonce to ajax calls

2.17.06.13

  • MOD: Dashboard Widget and Notices only available to Administrators

2.17.05.08

  • NEW: Added quick settings buttons to allow common settings to be quickly applied
  • NEW: Added current version info to help page

2.17.05.07

  • FIX: Some installs not saving plugin/theme exclusions due to theme incompatibility

2.17.05.06

  • MOD/FIX: On some WordPress installs is_plugin_active function being called too early. Moved is_plugin_active into a dedicated function called via admin_init as per codex: https://codex.wordpress.org/Function_Reference/is_plugin_active

2.17.05.05

  • FIX: Incorrect textarea identifier preventing exclusion save

2.17.05.04

  • FIX: Resolve early loading of plugin causing a fatal error due to function not available yet
  • FIX: CSS / JS not loading

2.17.05.03

  • MOD: Add text to advise running Wizard is not mandatory

2.17.05.01

  • massive Massive MASSIVE rewrite of Async JavaScript!!!
  • Now includes a Setup Wizard, Status page, Settings page and a help page.
  • Communicates directly with GTmetrix (account required)
  • Automatically transfers existing settings from Async JavaScript to Async JavaScript

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