Add modifier classes.

dist/js/splide.cjs.js

@@ -2669,6 +2669,8 @@ class SplideRenderer {
       CLASS_ROOT,
       `${CLASS_ROOT}--${options.type}`,
       `${CLASS_ROOT}--${options.direction}`,
+      options.drag && `${CLASS_ROOT}--draggable`,
+      options.isNavigation && `${CLASS_ROOT}--nav`,
       CLASS_ACTIVE,
       !this.config.hidden && CLASS_RENDERED
     ].filter(Boolean).join(" ");

dist/js/splide.esm.js

@@ -2665,6 +2665,8 @@ class SplideRenderer {
       CLASS_ROOT,
       `${CLASS_ROOT}--${options.type}`,
       `${CLASS_ROOT}--${options.direction}`,
+      options.drag && `${CLASS_ROOT}--draggable`,
+      options.isNavigation && `${CLASS_ROOT}--nav`,
       CLASS_ACTIVE,
       !this.config.hidden && CLASS_RENDERED
     ].filter(Boolean).join(" ");

src/js/renderer/SplideRenderer/SplideRenderer.ts

@@ -530,6 +530,8 @@ export class SplideRenderer {
       CLASS_ROOT,
       `${ CLASS_ROOT }--${ options.type }`,
       `${ CLASS_ROOT }--${ options.direction }`,
+      options.drag && `${ CLASS_ROOT }--draggable`,
+      options.isNavigation && `${ CLASS_ROOT }--nav`,
       CLASS_ACTIVE,
       ! this.config.hidden && CLASS_RENDERED,
     ].filter( Boolean ).join( ' ' );