this.menu.classList.add('anim', 'menuIn');
this.toggle.setAttribute('aria-expanded', 'true');
+ const menuOriginalRect = this.menu.getBoundingClientRect();
+ let heightOffset = 0;
+ const toggleHeight = this.toggle.getBoundingClientRect().height;
+ const dropUpwards = menuOriginalRect.bottom > window.innerHeight;
+
+ // If enabled, Move to body to prevent being trapped within scrollable sections
if (this.moveMenu) {
- // Move to body to prevent being trapped within scrollable sections
- this.rect = this.menu.getBoundingClientRect();
this.body.appendChild(this.menu);
this.menu.style.position = 'fixed';
if (this.direction === 'right') {
- this.menu.style.right = `${(this.rect.right - this.rect.width)}px`;
+ this.menu.style.right = `${(menuOriginalRect.right - menuOriginalRect.width)}px`;
} else {
- this.menu.style.left = `${this.rect.left}px`;
+ this.menu.style.left = `${menuOriginalRect.left}px`;
}
- this.menu.style.top = `${this.rect.top}px`;
- this.menu.style.width = `${this.rect.width}px`;
+ this.menu.style.width = `${menuOriginalRect.width}px`;
+ heightOffset = dropUpwards ? (window.innerHeight - menuOriginalRect.top - toggleHeight / 2) : menuOriginalRect.top;
+ }
+
+ // Adjust menu to display upwards if near the bottom of the screen
+ if (dropUpwards) {
+ this.menu.style.top = 'initial';
+ this.menu.style.bottom = `${heightOffset}px`;
+ } else {
+ this.menu.style.top = `${heightOffset}px`;
+ this.menu.style.bottom = 'initial';
}
// Set listener to hide on mouse leave or window click
this.menu.style.display = 'none';
this.menu.classList.remove('anim', 'menuIn');
this.toggle.setAttribute('aria-expanded', 'false');
+ this.menu.style.top = '';
+ this.menu.style.bottom = '';
+
if (this.moveMenu) {
this.menu.style.position = '';
this.menu.style[this.direction] = '';
- this.menu.style.top = '';
this.menu.style.width = '';
this.container.appendChild(this.menu);
}
+
this.showing = false;
}
getFocusable() {
- return Array.from(this.menu.querySelectorAll('[tabindex],[href],button,input:not([type=hidden])'));
+ return Array.from(this.menu.querySelectorAll('[tabindex]:not([tabindex="-1"]),[href],button,input:not([type=hidden])'));
}
focusNext() {