Dropdown table filter html

1. How do I add a filter to a dropdown in HTML?
2. How do you filter an HTML table based on drop down selected value?

How do I add a filter to a dropdown in HTML?

Use any element to open the dropdown menu, e.g. a <button>, <a> or <p> element. Use a container element (like <div>) to create the dropdown menu and add the dropdown links inside it. Wrap a <div> element around the button and the <div> to position the dropdown menu correctly with CSS.

How do you filter an HTML table based on drop down selected value?

Operation - user will select Subject name from select dropdown- then click on any of the radio button (above, below, between) and then enter value in textbox --> click on Filter button then table should show the filtered data.