On devices with touch screens such as smartphones and tablets on some websites, when you click on different page elements such as links, buttons, checkboxes, etc., an effect is displayed (the background color of the clicked element is an effect Blue fades) which indicates a click on the desired element. But in some websites, this effect is not displayed and if any element that can be clicked or hovering, if this is clicked, this effect will not be displayed and there will be no change in the background color of the clicked element.

For this topic, I have given two examples. The first is the stackoverflow site itself, which by clicking on icons, elements and links, the effect is displayed and the background color of the element changes.

And the second example is related to font pages and Google icons, which does not happen. Clicking on any element that can be clicked or hovering does not show any effect and does not change the background color of that element. Now my question is how can this effect be disabled so that it is not displayed by clicking on any element and this effect does not appear? What is the solution to disable this effect? Thankful

Example number one:

Example number two :