Leverage Browser Caching with W3 Total Cache

About a month ago, I posted on a basic setup of W3 Total Cache, a WordPress plugin designed to decrease page load times to improve user experience and SEO. Based on the needs of visitors here, I thought I would go more in-depth into the browser caching feature of W3TC.

How To Leverage Browser Caching in W3TC

Enabling your WordPress site to leverage browser caching can be done in 5 steps.

Step 1. Enable Preview Mode

Before tweaking any settings within W3 Total Cache, make sure you enable preview mode. This setting will allow you to see how the website performs with the new settings before going live with them. Click the “Enable” button to deploy preview mode on your site. This can be found from the General setting tab.

Step 2. Enable Browser Caching

You must enable Browser Caching within W3TC in order to leverage general browser caching. On the general settings of W3TC, scroll down and enable the Browser Cache.

Step 3. Specify Cache Headers

After you’ve enabled browser caching, click the “Browser Cache” section at the top of the plugin configuration, which will bring you to a page with general and specific settings for different configurations of cache headers. Below is a starting configuration and explanation of settings.

General Settings
These check boxes will toggle these settings for the next three sections down. It is recommended that you check the following 5 boxes (and what those boxes represent).

• Set expires header – The expires header is an expiration time of an entity of the web, whether an HTML document, CSS file, image, etc. The length specified in this header will control how long the cache of the entity is valid.
• Set cache control header – The cache control header is an additional header to encourage browser caching.
• Set entity tag (eTag) – The eTag is a validation tag that makes browser caching more efficient.
• Set W3 Total Cache Header – This is a header set by W3TC to assist in identifying optimized files.
• Enable HTTP (gzip) compression – Gzip compression will reduce the download time for text-based files.

Now that you have your global settings enabled for browser caching, it’s time to get more in-depth and specific with different sections.

CSS & JS

If you checked all of the boxes correctly in the general settings above, there will only be one change you need to make in this section. Under the “set expires header” section, change the value in “Expires Header Lifetime” to 604800. This is the amount of seconds that a CSS or JS file will be until a new cache of that file is created. 604800 seconds is the equivalent of two weeks, the minimum recommend time for ideal page speed optimization. You can increase the value here if you wish, but just be sure to clear your cache if you make changes to these files, that way users can be served the most up-to-date version of your site.

HTML & XML

HTML and XML files change much more frequently. There should be no changes made here. Make sure you leave the “Expires Header Lifetime” set to 3600 seconds. This controls elements of an HTML page all the way down to text, so make sure this is short enough to reflect how often a page could be updated. 3600 seconds (1 hour) is standard practice.

Media & Other Files

Mimic the settings of the CSS and JS section as these files rarely change.

Step 4. Save and Preview Your Caching Settings

Save your settings and preview your changes by clicking preview at the top of the plugin settings. This will open up a new browser window or tab. From here, you can check the difference in browser caching and how it impacts page speed. I recommend the Google Page Speed plugin. Install the extension for your browser and run the page speed scripts on your page. There may be a few outside elements (CSS, JS) hosted on other sites that may be out of your control in relation to browser caching. Don’t panic, most of these come from plugins. The majority of the files that you want to cache are already hosted in your server. Check the difference in Page Speed Score by running the scripts on the preview of your cache as well as the version without.

Step 5. Deploy W3 Total Cache Settings

Once everything looks good with the W3TC preview, go back to the plugin settings and click deploy, which will migrate all settings toggled in preview mode over the live version.

Notes on Caching

With the correct implementation of W3 Total Cache, leveraging browser caching will improve the speed of your website, giving users a better experience as well as improving SEO. As a WordPress developer, testing settings and implementing them can be tedious. Always use preview mode when making any changes, as they can greatly affect the way your site performs and even looks. Once you have the process down, you’ll be able to enjoy page speed scores of 90 and above! Good luck!

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Google's Allo Chat App

Google's Allo Chat App and How It's Different Than Other Messaging Apps

Google's Allo Chat App and How It's Different Than Other Messaging Apps Google is once again trying to be in every facet of your everyday life. From email to calendars, the Internet giant has become a staple for many lives. Now, they are revamping their instant messaging application game with the new Allo Chat that features some pretty clever artificial intelligence.

Your Own Personal Assistant

What sets apart this new messaging application from others is that Google is equipping it with a Google Assistant that can recommend places to grab lunch, update you on how your favorite team is doing and even find out where you are (in case you’re lost). You can add the capable assistant to any group you are in with friends by simply adding @google to the message. Though it’s important to note, much like a needy puppy, it may also interject whenever it feels like it.

Streamlined Conversations:-

Allo has a very interesting feature that allows users to partake in a more streamlined version of conversation. The app will give users options to quickly respond to friends. If someone asks: “How are you today?” Allo will give you three prompts to choose from that can be automatically sent in response. This can lead to two friends having an entire conversation… without really having to say anything at all. The recommendations are generally positive and can be seen through a very impressive feature that can recognize smiles and skylines. If your friend sends you a photo of them cheerfully smiling through the messaging app, Allo analyzes it and gives you suggestions on what to reply. Whisper And Shout Recently, Apple released iOS 10 alongside its new iPhone 7 that has a great focusing on messaging. In the new iMessage, users can send messages that will give readers the feeling of “shouts” or “whispers.” Google Allo refused to be left behind, so they incorporated this feature, as well as “stickers” that have been popping up in Facebook’s messaging system, Snapchat and now iMessage. Users can also draw on photos reminiscent of Snapchat’s classic feature that is now being seen on Instagram as well. Allo can be downloaded on iOS as well as Android but can only be used on mobile devices where as Facebook’s messaging service and Apple’s iMessage can continue the conversation through desktops.

Pressing Forward With Privacy

Encryption is a hot-button issue in today’s technological world that will become more and more prevalent. Allo allows users to enable an “Incognito Mode” that encrypts all chats from start to finish. You may also set your preferences with a feature that will delete messages sent within a certain window of time. Criticism has been swift as Apple’s iMessage automatically enables a similar feature when the user is first starting the program. At the announcement of the application, Google stated it would not store any conversations recorded on the application. But, Google has since retracted that and any conversations can be used for the company’s advertising business model and can be subjected to police warrants much like a Gmail account.

The purpose of Allo is to make conversations move more quickly by allowing the user to remain inside the application to find restaurants or recommendations. Google is using its incredibly powerful search engine to get the results users want. One issue with the newly created application is that there is not much integration with other Google services that many regularly use. For example, Google Maps cannot be used with the service or the ever-popular calendar service. It is only a matter of time before Google begins to add these crucial services to survive in the mobile messaging game. Survival is what Google must aim for now with so many other messaging applications currently available. Both Facebook and Whatsapp see over a billion users each month and Snapchat is now seeing over a 100 million active daily users. Google’s new messaging service is still in the early days of testing and has potential to have very impressive artificial intelligence that will move conversations forward quickly and flawlessly. As for now, people will stick to what they know best and more importantly, which of their contacts are using the applications. In order for any of these services to thrive, they must retain current users while continuing to attract a larger following.

What separates Google Allo from the rest is the Assistant feature that is sure to become more and more prominent as the application grows. Google is set on being a “one stop shop” for messaging. Eventually, we can expect to see much more than just messaging from entire lunch plans to meetings being created directly through the messaging application. They are creating a faster version of conversation that sure to continue at its growth rate thanks to their already impressive artificial intelligence advancements. These features aren’t seen in other apps, and Google isn’t shy about pointing that out. They are constantly rolling out new technology and updating features that are undeniably better than other competitors. Streamlining conversations in an already fast paced world may seem like a herculean task, but if there is one company to spearhead it’s Google – and the Allo chat app is just one step in the right direction.

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The tool has shed its Java dependency in favor of compiling Java source code to JavaScript

Google's Closure compiler, for optimizing and transpling JavaScript, no longer needs Java to run. Instead, Java source code is compiled to JavaScript so it can run under Node.js or in a browser. Java-dependent Closure had been introduced by Google in 2009.

The experimental release detailed this week supports ECMAScript 2015 features like arrow functions and let and const, and it provides polyfills for some ES2015 methods. It will check both syntax and types, and will provision warnings for JavaScript "gotchas." Google cautions, though, that some features are not available, and performance may not equal the Java version.

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The upgrade is not a rewrite of Closure in JavaScript. To use the new version, developers should add it as a dependency in a project via NPM, though it also can be used with the Gulp streaming build system.

"If you'd like to migrate from google-closure-compiler, which requires Java, you'll have to use gulp.src() or equivalents to load your JavaScript before it can be compiled. As this compiler runs in pure JavaScript, the compiler cannot load or save files from your file system directly," Google's Sam Thorogood, developer programs engineer, said. Developers not using Gulp or Webpack plugins will need to specify code via flags, release notes in GitHub state.

Closure is available under an Apache 2.0 license.

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