allow passing options for selected_class and unselected_class for ts.Button class

Author: lenadax

src/widget.js

@@ -249,12 +249,14 @@ export class Button extends ClickListener {
      * Create button instance.
      *
      * @param {Object} opts - Button options.
-     * @param {$} opts.elem - jQuery wrapped button element.
+     * @param {$} opts.elem - jQuery wrapped button element.+
+     * @param {$} opts.unselected_class - css class for unselected button.
+     * @param {$} opts.selected_class - css class for selected button.
      */
     constructor(opts) {
         super(opts);
-        this.unselected_class = 'btn-primary';
-        this.selected_class = 'btn-success';
+        this.unselected_class = opts.unselected_class ?? 'btn-primary';
+        this.selected_class = opts.selected_class ?? 'btn-success';
     }
 
     /**

treibstoff/bundle/treibstoff.bundle.js

@@ -1768,8 +1768,8 @@ var ts = (function (exports, $) {
     class Button extends ClickListener {
         constructor(opts) {
             super(opts);
-            this.unselected_class = 'btn-primary';
-            this.selected_class = 'btn-success';
+            this.unselected_class = opts.unselected_class ?? 'btn-primary';
+            this.selected_class = opts.selected_class ?? 'btn-success';
         }
         get selected() {
             return this.elem.hasClass(this.selected_class);