How to remove duplicate option from Select dropdown using JQuery

+30 How to remove duplicate option from Select dropdown using JQuery <!DOCTYPE html> <html lang=”en”> <head> <title>Codelizar – Remove duplicate options</title> <link rel=”stylesheet” href=”https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css”> <script src=”https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js”></script> <script src=”https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js”></script> </head> <body> <h1>Method 1</h1> <select id=”sel_box”> <option value=””>All Equipment</option> <option value=”1″>Dumbells</option> <option value=”2″>Plates</option> <option value=”3″>Rodes</option> <option value=”4″>Benches</option> </select> <h1>Method 2</h1> <select id=”sel_box_another”> <option value=””>All Equipment</option> <option value=”1″>Dumbells</option> …