then 'Add to home screen'
then 'Add to home screen'
Example code
Step 1
XTRA
Modify single post featured image and post format HTML
In the following example you can see how to add attribute to the featured image.
XTRA
How and where should I add this PHP codes?
Best solution is to add custom actions and filters in Child Theme functions.php file. But also you can create your own plugin and use this codes in your plugin.
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