This is an example of a simple header dropdown menu, designed using HTML, JavaScript, CSS, and Bootstrap framework 4. The fonts and Bootstrap styles are imported to the code with their URLs. JavaScript functions have been used to implement the toggle functions of the header. The concept of Lists has been used with UL and LI components. UL element has been used with the child elements of LI to display the child elements of the header, in an orderly manner. The font family style for the header is set as Poppins, sans-serif. The header is given a background color of #ffc107, which changes to #ffd761, in a hover event. The header child elements are given a font color as #292929, padding as15px, and display as block. A cursor style for the elements is set as pointer to get the hand cursor effect in a hover event. Media quarries have been used to increase the responsiveness of the form. Source: https://www.tolmatol.com/css-snippets-drop-down-menu-with-jquery-responsive/