Execute a callback after changing the style attribute via JS on an element?

Question

PHP

There is a block, through JS style.display is changed to 'block'. After changing the display property, you need to call the function.

Answer 1

Create a .htaccess file (this is how the file should look like, i.e. without a name, just an extension), in the root of the site and write AddDefaultCharset UTF-8 into it

Answer 2

<meta charset="utf-8">
should be

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

Answer 3

So what's the problem?
You wrap style.display in a function and call callback() in it

function elementShow(callback){
  style.display
callback()
}

elementShow(() => {
   //та самая callback функция
})