• Resolved rarcher30

    (@rarcher30)


    How does the GP theme support IE8 when/if we use SVG graphics? Can we set a fallback to use PNG graphic instead if the browser is IE8 or doesn’t support SVG? In the past I’ve used JavaScript like <img src="image.svg" onerror="this.src='image.png'; this.onerror=null;"> or other techniques suggested in CSS Tricks https://css-tricks.com/a-complete-guide-to-svg-fallbacks/

    Just curious to find out if GP deals with this problem at all since it supports IE8 browsers.

    Cheers.

Viewing 6 replies - 1 through 6 (of 6 total)
  • Theme Author Tom

    (@edge22)

    Hi there,

    GP doesn’t have any mechanism by default for SVGs, as WP doesn’t even allow them in the Media Library without adding a filter (the repository doesn’t allow us to allow SVGs by default).

    Any of the methods you posted above should work fine with GP and WP ??

    Thread Starter rarcher30

    (@rarcher30)

    Cool, most likely they will be implemented in the design of the website for things like logos, headers and such. No way I’m going to do it for just inserting media into a page or post – too much work!

    I think I’d need to edit/override some of your theme code in a child theme file or two, depending on where I wish to support SVG.

    Theme Author Tom

    (@edge22)

    Let me know what changes you make to the code, I’d be interested to see if it’s something that I should integrate ??

    Thread Starter rarcher30

    (@rarcher30)

    Hi Tom,

    sheepish to admit it but I was compelled to edit your logo/site identity code within my child functions.php file. Firstly, I downloaded the SVG Support plugin https://www.ads-software.com/plugins/svg-support/ so that I could upload SVG graphics into the Media Manager and have WordPress recognise and process the files.

    Then I altered the php code as thus:

    // Site logo
    	if ( ! empty( $generate_settings['logo'] ) ) : ?>
    		<div class="site-logo">
    			<a href="<?php echo apply_filters( 'generate_logo_href' , esc_url( home_url( '/' ) ) ); ?>" title="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>" rel="home"><img class="header-image" src="/wp-content/uploads/2016/03/my-branding-logo.svg" onerror="this.src='/wp-content/uploads/2016/03/my-branding-logo.gif'; this.onerror=null;" alt="My top level branding" title="My top level branding" />
    
    <!-- Child theme customization to insert TMR text graphic (can't do in customizer) -->
       <img class="tmr-title" src="/wp-content/uploads/2016/03/Main-Roads-Title_navy.svg" onerror="this.src='/wp-content/uploads/2016/03/Main-Roads-Title_navy.gif'; this.onerror=null;" alt="Dept of Main Roads Blog" />
    		</div>
    	<?php endif;

    I’ve slightly changed the code for privacy reasons whilst site is in dev

    As you can see, I have used the inline JS SVG fallback for older browsers that don’t support IE8. I don’t think your theme uses the Modernizr library, but if it did, I could run this function:

    if (!Modernizr.svg) {
      $("img[src$='.svg']")
        .attr("src", fallback);
    }

    But unless the site is going to have SVG graphics all over it, it hardly seems effective to introduce a ‘sniffer’ such as Modernizr lib just for that.

    This question also relates to this other thread: https://www.ads-software.com/support/topic/alt-text-on-site-logo?replies=4

    So really what I have done, is override the customiser feature by hard coding it into a child functions.php file. I am willing to live with that as it’s highly unlikely that the site will need to change its branding and/or logo.

    Theme Author Tom

    (@edge22)

    Very cool – I see no problem with what you’ve done there (hoping you removed the actual URL from the src though).

    Other than that it looks great! ??

    Thread Starter rarcher30

    (@rarcher30)

    (hoping you removed the actual URL from the src though).

    Yeah made sure that I did that ??

Viewing 6 replies - 1 through 6 (of 6 total)
  • The topic ‘Using SVG graphics and IE8 support’ is closed to new replies.