To validate an email address in JavaScript, you can use a regular expression (regex) pattern.

You can use the ::placeholder pseudo-element in CSS to target the placeholder text of an HTML5 input and change its color.

No, there is no parent selector in CSS. CSS selectors allow you to select elements based on their tag name, class, and id, as well as their attributes and their relationship to other elements in the DOM (Document Object Model). However, there is no way to select an element based solely

To select the first element with a specific class in CSS, you can use the :first-of-type pseudo-class in combination with the class selector.

To change an element's class with JavaScript, you can use the className property to set the class to a new value.

​If you would like to creating new user accounts in your MySQL server with password using the command below,

You are able to set and get environment variables in Python you can just use the os module.