As each part of the image needs to be described by XML it's not feasible to display photographs using the format the number of XML elements tends to grow quite large and causes the image size to balloon. The following shows an image (taken from Wikipedia) opened in a text editor and image viewer. This is in contrast to raster-based image formats that usually need to grow immensely to be rendered at larger resolutions.Īs the SVG image is created using XML, it can be opened in either a text editor, image in a web browser or image editing software. Because the image is described essentially mathematically, the image looks the same at any resolution and can be scaled up without causing pixelation. ![]() Meaning, the file size of SVG images is usually much lower than other image formats. Unlike image formats like jpeg or png that use pixel information to describe what an image contains (called raster images), an SVG uses XML elements to describe the shapes and colours that should make up the image. The format was developed in 1999 and has support across all web browsers. Var originalThrobber = ĭ (or Scalable Vector Graphics) is a type of image format defined using text in the form of XML. if the element had something specified. Override the progress throbber, to actually use a different progress style It falls back to Drupal's original method when the progress type isn't specified in a ' data-progress-type' attribute. Back in my ajax-overrides.js file, I've added this snippet to override the standard 'throbber' progress type that AJAX links would otherwise always use. Since that only gets applied to form elements, not arbitrary links using the ' use-ajax' class, we have to do the work to pick this up ourselves. ![]() I want this to work similarly to the $element property that can be set on form elements that use AJAX. I've already added the ' data-dialog-type' attribute to my link, so now I just add a ' data-progress-type' attribute, with a value of ' snowman'. Part 3, adding a custom attribute to specify that our AJAX link should use a Snowman animation, is easily achieved. ![]() Given that the styling of the default spinner happens to make links & lines jump around, I've got the ajax-progress-fullscreen class in there, to be more like the 'full screen' graphic that the Views UI uses, and avoid the need to add too much more styling myself. ajax-progress-snowman appropriately, to show a lovely snowman in the middle of the page, rather than a tiny blue spinner next to the link that triggered the AJAX. theme file:įunction MYTHEME_library_info_alter(&$libraries, $extension) )(jQuery, window, Drupal, drupalSettings) ![]() So I implemented hook_library_info_alter() in my theme's main. But I decided I wanted to treat my work as if it were part of Drupal's core AJAX library itself, rather than something to add separately. Usually, you would define a library and add it with #attached. There are many ways to achieve points 1 and 2.
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