overwrite navbar-toggler code example
Example: customize navbar-toggler-icon
// this is a black icon with 50% opacity .navbar-light .navbar-toggler-icon { background-image: url(“data:image/svg+xml;..”); } // this is a white icon with 50% opacity .navbar-dark .navbar-toggler-icon { background-image: url(“data:image/svg+xml;..”); }