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What to do with theme wrappers in Drupal?
The #theme_wrappers property contains an array of theme functions which will be called, in order, after #theme has run. These can be used to add further markup around the rendered children; e.g., fieldsets add the required markup for a fieldset around their rendered child elements.
Do you call Drupal _ render ( ) in twig?
Twig renders everything automatically so there is no need to call drupal_render() or theme() within a preprocess function. Instead, render arrays should be passed to the template since this allows for much more customization than an already-rendered HTML string. Removing theme() call from a preprocess function:
How does Drupal render an array in HTML?
Renders HTML given a structured array tree. Recursively iterates over each of the array elements, generating HTML code. Renderable arrays have two kinds of key/value pairs: properties and children. Properties have keys starting with ‘#’ and their values influence how the array will be rendered.
When to remove Drupal _ render from a preprocess function?
Removing drupal_render() from a preprocess function is just a matter of removing the call: Common is that drupal_render() was called when adding to table data. While render arrays provide an addressable, alterable structure for data all the way through to the template, not all variables require render arrays.
How to add CSS and JavaScript in Drupal?
The stylesheets property (for adding CSS) in THEME. info has been removed and replaced by *. libraries. yml where `*` is the name of the theme or module. The scripts property (for adding JS) in THEME. info has been removed and also replaced by *. libraries. yml where `*` is the name of the theme or module.
How to render specific form elements from the *.theme?
To render single form elements you need to specify a separate custom template. 1. Register the custom template in a theme hook 2. Add the custom template to the form mytheme.theme or mymodule.module: You can skip this step if you use as template name the form id, see the comment from @BradJ. 3. Use the custom template to style single form elements
How to create a cache ID in Drupal?
To use drupal_render () caching, set the element’s #cache property to an associative array with one or several of the following keys: ‘keys’: An array of one or more keys that identify the element. If ‘keys’ is set, the cache ID is created automatically from these keys. See drupal_render_cid_create ().
How to define the cache granularity in Drupal?
‘granularity’ (optional): Define the cache granularity using binary combinations of the cache granularity constants, e.g. DRUPAL_CACHE_PER_USER to cache for each user separately or DRUPAL_CACHE_PER_PAGE | DRUPAL_CACHE_PER_ROLE to cache separately for each page and role. If not specified the element is cached globally for each theme and language.