When the defer attribute is present in the script tag, it specifies that the script is executed when the page has finished parsing. A requirement that is enforced by Google for example (Page-Speed ranking).
Currently the WordPress wp_enqueue_script provides no easy way to add new attributes, but there is a way around that :)
The below hack / filter needs to be added to your theme function.php. The filter should be your preferred solution, as the clean_url filter has been deprecated.
Make sure that your website / theme is still loading after adding these changes. If needed you can add more exceptions, as I did for jQuery.
Hack for WordPress before 4.1
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if(is_admin() === FALSE){ function defer_parsing_of_js ( $url ) { if ( FALSE === strpos( $url, '.js' ) ) return $url; if ( strpos( $url, 'jquery.js' ) ) return $url; return "$url' defer "; } add_filter( 'clean_url', 'defer_parsing_of_js', 11, 1 ); } |
Filter for WordPress 4.1+
Updated: 26.04.2015 – using clean Regexp
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if(is_admin() === FALSE){ function add_js_defer($tag, $handle, $src){ if( strpos( $tag, 'jquery.js' ) ) return $tag; preg_match_all('/([\w\-.:]+)\s*=\s*("[^"]*"|\'[^\']*\'|[\w\-.:]+)/i', $tag, $match); $newtag = "<script "; foreach($match[1] as $key=> $val){ $newtag .= $val."=".$match[2][$key]." "; } $newtag .= "defer></script>"; return $newtag.PHP_EOL; } add_filter( 'script_loader_tag', 'add_js_defer', 11, 1 ); } |
Compressing your content saves bandwidth and improves render time, particular on devices with slow internet connections. Compression allows your web server to provide smaller file sizes that load faster for your visitors. Compression of your HTML and CSS files with gzip typically saves around 50 to 70 % of the file size.
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# compress text, html, javascript, css, xml: AddOutputFilterByType DEFLATE text/plain AddOutputFilterByType DEFLATE text/html AddOutputFilterByType DEFLATE text/xml AddOutputFilterByType DEFLATE text/css AddOutputFilterByType DEFLATE application/xml AddOutputFilterByType DEFLATE application/xhtml+xml AddOutputFilterByType DEFLATE application/rss+xml AddOutputFilterByType DEFLATE application/javascript AddOutputFilterByType DEFLATE application/x-javascript # Or, compress certain file types by extension: <files *.html> SetOutputFilter DEFLATE </files> |
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gzip on; gzip_comp_level 2; gzip_http_version 1.0; gzip_proxied any; gzip_min_length 1100; gzip_buffers 16 8k; gzip_types text/plain text/html text/css application/x-javascript text/xml application/xml application/xml+rss text/javascript; # Disable for IE < 6 because there are some known problems gzip_disable "MSIE [1-6].(?!.*SV1)"; # Add a vary header for downstream proxies to avoid sending cached gzipped files to IE6 gzip_vary on; |
A good candidate is the WP Far Future Expiration Plugin ,which not only activates GZIP compression but adds file expiration for various static file types.
Link
Check speed improvement before and after
I had a problem with the tag pagination throwing 404 errors and was forced to integrate a custom query into the 404 page, while fixing the rewrite rules ;)
This is how you force a different HTTP response header with WordPress, in this case a simple HTTP/1.1 200 OK.
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$GLOBALS['wp_query']->is_404 = false; status_header( 200 ); |
Some tweaking to add your own classes to the body tag
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add_filter( 'body_class', 'my_class_names' ); function my_class_names( $classes ) { $classes[] = "archive tag " ; return $classes; } |
As part of our complete network upgrade, portalZINE.TV gets a complete facelift as well. The whole website has been streamlined in preparation for the new season.
While building plugins for WordPress is fun, it often means repeating tasks over and over again. I love clean and organized code! For my last internal project, a Visual Composer addon bundle, I decided to build a modular system.
So I have one central plugin, handling multiple modules that access methods from the plugin. This allows me to reuse public and admin routines. In combination with _autoload and traits, this makes the codebase lean and mean.
I also decided to use TWIG fully for the presentation layer. Each module can be activated, deactivated, registers their own public and admin views, admin menus, ajax calls, dashboard widgets and additional context.
I am currently in the process of cleaning this up and will share some more details soon.
Cheers
Alex
„WebP is an image format employing both lossy and lossless compression. It is currently developed by Google, based on technology acquired with the purchase of On2 Technologies.“ – Wikipedia
As the WebP is not widely supported, you need to use polyfills or workarounds to actually use it. But it makes a lot of sense when you are building image heavy applications for the web. It decreases file-sizes immensely and supports transparency as PNG does.
To allow WebP upload in WordPress, add this to your functions.php:
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add_filter('upload_mimes','webp_mime_type'); function webp_mime_type($mimes){ return array_merge($mimes,array ( 'webp' => 'image/webp' )); } |
Browsers with native support will show WebP images natively, for browsers without support deploy WebPJS developed by Google. Download and add it to your theme functions.php
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function webp_script() { // Loads JavaScript file for webp image support in all browsers wp_enqueue_script( 'webpjs-script', get_template_directory_uri() . '/js/webpjs-0.0.2.min.js'); } add_action( 'wp_enqueue_scripts', 'webp_script' ); |
This should do the trick and enable WebP for all modern browsers, see browser support on the WebPJS development page.
Here another little nice trick to check for WebP using Javascript and replace webp with png images.
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window.testWebP = function(callback) { var webP = new Image(); webP.onload = webP.onerror = function () { callback(webP.height == 2); }; webP.src = 'data:image/webp;base64,UklGRjoAAABXRUJQVlA4IC4AAACyAgCdASoCAAIALmk0mk0iIiIiIgBoSygABc6WWgAA/veff/0PP8bA//LwYAAA'; }; window.testWebP(function(support) { if(!support){ $('img[src$=".webp"]').each(function(index,element) { element.src = element.src.replace('.webp','.png'); }); } }); |
Enjoy
Alex
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function cc_mime_types( $mimes ){ $mimes['svg'] = 'image/svg+xml'; return $mimes; } add_filter( 'upload_mimes', 'cc_mime_types' ); |
Just add that to your themes functions.php.
Normally the functions.php in your CHILD theme is called before the PARENT functions.php. In some cases, you might like to alter functionality loaded through the PARENT theme in your CHILD theme, which is not possible without some changes.
From the WordPress Codex :“Unlike style.css, the functions.php of a child theme does not override its counterpart from the parent. Instead, it is loaded in addition to the parent’s functions.php. (Specifically, it is loaded right before the parent’s file.)“
For our new setup, I am using a base class in our PARENT theme to define all our defaults. Some of the CHILD themes need to overwrite or adjust functionality. This allows to have a pure foundation, than alter and extend as needed.
PARENT functions.php
is extending the TimberSite class in my case, as I am using Timber (TWIG for WordPress) for my themes
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class cubicFusionBase extends TimberSite { function __construct(){ parent::__construct(); } } // If no CHILD theme is loading init the parent class if(CHILD_THEME_LOADED != 1){ new cubicFusionBase(); } |
CHILD functions.php
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// Do not init the parent class define("CHILD_THEME_LOADED", 1); // Wait for theme setup to be finished add_action( 'after_setup_theme', function() { // Extend parent theme class class cubicFusionChild extends cubicFusionBase { function __construct() { // Call parent class constructor parent::__construct(); } /* Add or extend any other functionality here */ } // Init Child class new cubicFusionChild(); }, 42 ); |
Cheers
Alex
I have been working on a full integration of fullpage.js into Visual Composer for WordPress. This allows to easily build fullpage layouts, with different pages and full slide capabilities. Also added iScroller functionality, to allow overflow content to work nicely on certain pages. All of this is working with simple drag & drop :) and can be used by any unexperienced user.
I am currently cleaning up the addon, but I am not sure yet if I will offer it as a commercial addon or keep it for my internal projects only :)
Will post a video later this week.
Cheers
Alex
Visual Composer for WordPress provides many ways to extend its functionality. There are already many add-ons available for this dynamic page builder, but its easy to do the extending yourself, by following the hints in the documentation ;)
In this small tutorial we are adding a „type“ field to allow a special css class to be added to each of our row containers.
New Visual Composer element properties can be easily added by using the vc_add_param function. See documentation for more information. In our case we are adding a property to the vc_row element.
Extending the Visual Composer Row element with a new property weiterlesen