class SidebarNavigation {
constructor(options = {}) {
// Basic configuration properties
this.config = {
minWidth: options.minWidth || MegaMenuCONFIG.minWidth, // Using external minWidth variable
menuSelector: options.menuSelector || '.dwc-nest-menu',
openClass: options.openClass || 'brx-open',
activeClasses: options.activeClasses || ['open', 'active'],
leftHeaderClass: options.leftHeaderClass || 'brx-header-left',
rightHeaderClass: options.rightHeaderClass || 'brx-header-right',
debounceDelay: options.debounceDelay || 100,
menuItemClickDelay: options.menuItemClickDelay || 300
};
// Set dependent selectors
const menuSelector = this.config.menuSelector;
this.config.submenuToggleSelector = options.submenuToggleSelector || `${menuSelector} .brx-submenu-toggle`;
this.config.dropdownSelector = options.dropdownSelector || `${menuSelector} .brxe-dropdown`;
this.config.dropdownContentSelector = options.dropdownContentSelector || `${menuSelector} .brx-dropdown-content`;
// State
this.previousHeaderClass = null;
this.dropdownClickHandlers = new Map();
this.menuHoverHandlers = null;
this.menuItemClickTimeout = null;
this.keyboardNavHandler = null;
this.cachedFocusableElements = null;
this.cachedElements = {
menuElement: null,
navElement: null,
dropdowns: null,
dropdownToggles: null,
menuItems: null
};
// Bind methods to this instance
this.handleResize = this.debounce(this.handleMenu.bind(this), this.config.debounceDelay);
this.handleOutsideClick = this.handleOutsideClick.bind(this);
}
// Initialize everything - called once
init() {
// Wait for DOM to be fully loaded before attaching events
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', () => {
this.initAfterDOMLoaded();
}, { once: true });
} else {
this.initAfterDOMLoaded();
}
return this;
}
// Separate initialization method to run after DOM is loaded
initAfterDOMLoaded() {
// Cache DOM elements once
this.cacheElements();
// Setup resize event with passive flag
window.addEventListener('resize', this.handleResize, { passive: true });
// Setup mutation observer for critical class changes only
this.setupMutationObserver();
// Initial setup based on current screen size
this.handleMenu();
// Cache focusable elements once if header class is present
if (this.hasHeaderClass()) {
this.cacheFocusableElements();
this.setupMenuFocusNavigation();
}
}
// Cache all required DOM elements upfront
cacheElements() {
this.cachedElements.menuElement = document.querySelector(this.config.menuSelector);
if (this.cachedElements.menuElement) {
this.cachedElements.navElement = this.cachedElements.menuElement.querySelector('.dwc-nest-nav-items');
this.cachedElements.dropdowns = Array.from(document.querySelectorAll(this.config.dropdownSelector));
this.cachedElements.dropdownToggles = Array.from(document.querySelectorAll(this.config.submenuToggleSelector));
this.cachedElements.menuItems = Array.from(document.querySelectorAll(`${this.config.menuSelector} .menu-item`));
}
}
// Set up a focused mutation observer only for dropdown state changes
setupMutationObserver() {
if (!this.cachedElements.dropdowns || this.cachedElements.dropdowns.length === 0) return;
const callback = (mutations) => {
for (let mutation of mutations) {
if (mutation.type === 'attributes' && mutation.attributeName === 'class') {
const target = mutation.target;
const prevClassList = mutation.oldValue ? mutation.oldValue.split(' ') : [];
const hadBothBefore = prevClassList.includes('open') && prevClassList.includes('active');
const hasBothNow = target.classList.contains('open') && target.classList.contains('active');
if (hadBothBefore !== hasBothNow) {
this.updateDropdownAccessibility();
break; // Only need to update once per batch
}
}
}
};
// Create observer with optimized options
this.classObserver = new MutationObserver(callback);
// Observe only the dropdown elements
this.cachedElements.dropdowns.forEach(dropdown => {
this.classObserver.observe(dropdown, {
attributes: true,
attributeFilter: ['class'],
attributeOldValue: true
});
});
}
// Cache focusable elements for keyboard navigation
cacheFocusableElements() {
if (!this.cachedElements.navElement) return;
// Get direct children of nav
const directChildren = Array.from(this.cachedElements.navElement.children);
// Find the first focusable element within each direct child
this.cachedFocusableElements = directChildren.map(child => {
// Check if the child itself is focusable
if (child.matches('a, button, input, select, textarea, [tabindex]:not([tabindex="-1"])')) {
return child;
}
// Otherwise, find the first focusable element within this child
return child.querySelector('a, button, input, select, textarea, [tabindex]:not([tabindex="-1"])');
}).filter(Boolean); // Remove null/undefined values
}
// Clean up all event listeners and observers
destroy() {
// Clean up the mutation observer
if (this.classObserver) {
this.classObserver.disconnect();
this.classObserver = null;
}
// Clean up resize listener
window.removeEventListener('resize', this.handleResize);
// Clean up click handlers
if (this.dropdownClickHandlers.size > 0) {
this.dropdownClickHandlers.forEach((handler, toggle) => {
toggle.removeEventListener('click', handler);
});
this.dropdownClickHandlers.clear();
}
// Clean up hover handlers
this.cleanupMenuHover();
// Clean up menu item click handlers
this.cleanupMenuItemClicks();
// Clean up outside click handler
document.removeEventListener('click', this.handleOutsideClick);
// Clean up keyboard navigation
if (this.keyboardNavHandler) {
document.removeEventListener('keydown', this.keyboardNavHandler);
this.keyboardNavHandler = null;
}
// Clear any pending timeouts
if (this.menuItemClickTimeout) {
clearTimeout(this.menuItemClickTimeout);
this.menuItemClickTimeout = null;
}
}
// Utility methods
hasHeaderClass() {
return document.body.classList.contains(this.config.leftHeaderClass) ||
document.body.classList.contains(this.config.rightHeaderClass);
}
debounce(func, delay) {
let timer;
return (...args) => {
clearTimeout(timer);
timer = setTimeout(() => func(...args), delay);
};
}
// Check if an element has all the required active classes
hasAllActiveClasses(element) {
return this.config.activeClasses.every(className => element.classList.contains(className));
}
// Toggle all active classes on an element
toggleActiveClasses(element) {
this.config.activeClasses.forEach(className => {
element.classList.toggle(className);
});
}
// Core functionality methods
handleMenu() {
if (!this.cachedElements.menuElement) return;
if (!this.hasHeaderClass() && !this.previousHeaderClass) return;
const screenWidth = window.innerWidth;
const isLargeScreen = screenWidth >= this.config.minWidth;
const menuElement = this.cachedElements.menuElement;
if (!isLargeScreen) {
// Save which class was present before removal
if (this.hasHeaderClass()) {
this.previousHeaderClass = document.body.classList.contains(this.config.leftHeaderClass)
? this.config.leftHeaderClass
: this.config.rightHeaderClass;
// Remove header classes
document.body.classList.remove(this.config.leftHeaderClass, this.config.rightHeaderClass);
menuElement.classList.remove(this.config.openClass);
// Reset accessibility attributes
this.resetAccessibilityAttributes();
}
// Clean up event handlers for mobile view
this.cleanupMenuHover();
this.cleanupMenuItemClicks();
this.cleanupDropdownHandlers();
document.removeEventListener('click', this.handleOutsideClick);
return;
}
// Large screen behavior
if (!this.hasHeaderClass() && this.previousHeaderClass) {
document.body.classList.add(this.previousHeaderClass);
}
if (this.hasHeaderClass()) {
if (!menuElement.classList.contains(this.config.openClass)) {
menuElement.classList.add(this.config.openClass);
}
// Setup elements for large screen view
this.setupMenuHover();
this.setupMenuItemClicks();
this.setupDropdownHandlers();
this.setupMenuFocusNavigation();
this.updateDropdownAccessibility();
// Ensure outside click handler is set up
document.removeEventListener('click', this.handleOutsideClick);
document.addEventListener('click', this.handleOutsideClick, { passive: false });
}
}
// Reset accessibility attributes when switching to mobile
resetAccessibilityAttributes() {
if (!this.cachedElements.dropdowns) return;
// Remove all inert attributes from dropdown contents
this.cachedElements.dropdowns.forEach(dropdown => {
const content = dropdown.querySelector(this.config.dropdownContentSelector);
if (content) {
content.removeAttribute('inert');
}
const button = dropdown.querySelector('button');
if (button) {
button.setAttribute('aria-expanded', 'false');
}
});
}
setupMenuFocusNavigation() {
// Only run if hasHeaderClass() is true and we have focusable elements
if (!this.hasHeaderClass() || !this.cachedFocusableElements || this.cachedFocusableElements.length === 0) {
return;
}
// Clean up previous handler if it exists
if (this.keyboardNavHandler) {
document.removeEventListener('keydown', this.keyboardNavHandler, true);
this.keyboardNavHandler = null;
}
const navMenu = this.cachedElements.menuElement;
const focusableElements = this.cachedFocusableElements;
const firstFocusableElement = focusableElements[0];
const lastFocusableElement = focusableElements[focusableElements.length - 1];
// Find adjacent focusable elements outside the menu (only once during setup)
const headerElement = navMenu.closest('header') || document.querySelector('header');
// Prepare variables to hold adjacent elements
let prevFocusableElement = null;
let nextFocusableElement = null;
let firstElementAfterHeader = null;
if (headerElement) {
// Get all focusable elements within the header - do this once and cache the result
const headerFocusables = Array.from(
headerElement.querySelectorAll('a:not([tabindex="-1"]), button:not([tabindex="-1"]), input:not([tabindex="-1"]), select:not([tabindex="-1"]), textarea:not([tabindex="-1"]), [tabindex]:not([tabindex="-1"])')
).filter(el => window.getComputedStyle(el).display !== 'none');
// Find the index of our first and last menu elements in one pass
const menuStartIndex = headerFocusables.indexOf(firstFocusableElement);
const menuEndIndex = headerFocusables.indexOf(lastFocusableElement);
// Cache the adjacent elements
if (menuStartIndex > 0) {
prevFocusableElement = headerFocusables[menuStartIndex - 1];
}
if (menuEndIndex !== -1 && menuEndIndex < headerFocusables.length - 1) {
nextFocusableElement = headerFocusables[menuEndIndex + 1];
}
// Pre-calculate the first element after header - but only if needed
if (!nextFocusableElement) {
// Use a more efficient selector that targets immediate children of body that aren't the header
const selector = 'body > *:not(header)';
const nonHeaderElements = document.querySelectorAll(selector);
// Only process if we have elements
if (nonHeaderElements.length > 0) {
// Create a function to find the first focusable element (used later if needed)
this.findFirstFocusableAfterHeader = () => {
for (const element of nonHeaderElements) {
const focusable = element.querySelector('a:not([tabindex="-1"]), button:not([tabindex="-1"]), input:not([tabindex="-1"]), select:not([tabindex="-1"]), textarea:not([tabindex="-1"]), [tabindex]:not([tabindex="-1"])');
if (focusable && window.getComputedStyle(focusable).display !== 'none') {
return focusable;
}
}
return null;
};
}
}
}
// Create keyboard navigation handler with closure over the cached elements
this.keyboardNavHandler = (e) => {
// Quick check for Tab key first
if (e.key !== 'Tab') return;
// Then check if focus is inside the menu
if (!navMenu.contains(document.activeElement)) return;
let targetElement = null;
// Handle tab navigation at boundaries only
if (!e.shiftKey && document.activeElement === lastFocusableElement) {
// Forward tab from last element
e.preventDefault();
e.stopPropagation();
if (nextFocusableElement) {
targetElement = nextFocusableElement;
} else if (this.findFirstFocusableAfterHeader) {
// Only search for elements after header if needed and not already found
firstElementAfterHeader = this.findFirstFocusableAfterHeader();
targetElement = firstElementAfterHeader;
}
// Focus on the target or body as fallback
setTimeout(() => {
if (targetElement) {
targetElement.focus();
} else {
document.body.setAttribute('tabindex', '-1');
document.body.focus();
document.body.removeAttribute('tabindex');
}
}, 10);
}
else if (e.shiftKey && document.activeElement === firstFocusableElement) {
// Backward tab from first element
e.preventDefault();
e.stopPropagation();
setTimeout(() => {
if (prevFocusableElement) {
prevFocusableElement.focus();
} else {
document.body.setAttribute('tabindex', '-1');
document.body.focus();
document.body.removeAttribute('tabindex');
}
}, 10);
}
};
// Use capture phase for the event
document.addEventListener('keydown', this.keyboardNavHandler, true);
}
setupMenuHover() {
const menuElement = this.cachedElements.menuElement;
if (!menuElement) return;
// Clean up existing hover handlers first
this.cleanupMenuHover();
// Create event handlers
const mouseenterHandler = () => {
menuElement.classList.add(this.config.openClass);
};
const mouseleaveHandler = () => {
menuElement.classList.remove(this.config.openClass);
};
// Add event listeners with passive flag for better performance
menuElement.addEventListener('mouseenter', mouseenterHandler, { passive: true });
menuElement.addEventListener('mouseleave', mouseleaveHandler, { passive: true });
// Store the handlers for cleanup
this.menuHoverHandlers = {
element: menuElement,
mouseenter: mouseenterHandler,
mouseleave: mouseleaveHandler
};
}
cleanupMenuHover() {
if (this.menuHoverHandlers) {
const { element, mouseenter, mouseleave } = this.menuHoverHandlers;
element.removeEventListener('mouseenter', mouseenter);
element.removeEventListener('mouseleave', mouseleave);
this.menuHoverHandlers = null;
}
}
setupMenuItemClicks() {
if (!this.cachedElements.menuItems || this.cachedElements.menuItems.length === 0) return;
// Clean up existing handlers first
this.cleanupMenuItemClicks();
const menuElement = this.cachedElements.menuElement;
const menuItemHandlers = new Map();
this.cachedElements.menuItems.forEach(item => {
const clickHandler = () => {
if (this.hasHeaderClass()) {
// Clear any existing timeout
if (this.menuItemClickTimeout) {
clearTimeout(this.menuItemClickTimeout);
}
// Set timeout before adding the class
this.menuItemClickTimeout = setTimeout(() => {
if (!menuElement.classList.contains(this.config.openClass)) {
menuElement.classList.add(this.config.openClass);
}
}, this.config.menuItemClickDelay);
}
};
menuItemHandlers.set(item, clickHandler);
item.addEventListener('click', clickHandler);
});
this.menuItemClickHandlers = menuItemHandlers;
}
cleanupMenuItemClicks() {
if (this.menuItemClickHandlers && this.menuItemClickHandlers instanceof Map) {
this.menuItemClickHandlers.forEach((handler, item) => {
item.removeEventListener('click', handler);
});
this.menuItemClickHandlers.clear();
}
if (this.menuItemClickTimeout) {
clearTimeout(this.menuItemClickTimeout);
this.menuItemClickTimeout = null;
}
}
setupDropdownHandlers() {
if (!this.hasHeaderClass() || !this.cachedElements.dropdownToggles) return;
// Clean up existing handlers first
this.cleanupDropdownHandlers();
this.cachedElements.dropdownToggles.forEach(toggle => {
const clickHandler = (event) => {
event.stopPropagation();
event.preventDefault();
const dropdown = toggle.closest(this.config.dropdownSelector);
if (dropdown) {
this.toggleActiveClasses(dropdown);
this.updateDropdownAccessibility();
}
};
this.dropdownClickHandlers.set(toggle, clickHandler);
toggle.addEventListener('click', clickHandler);
});
}
cleanupDropdownHandlers() {
if (this.dropdownClickHandlers.size > 0) {
this.dropdownClickHandlers.forEach((handler, toggle) => {
toggle.removeEventListener('click', handler);
});
this.dropdownClickHandlers.clear();
}
}
handleOutsideClick(event) {
if (event.target.tagName === 'A') return;
if (!event.target.closest(this.config.dropdownSelector)) return;
if (!event.target.closest(this.config.submenuToggleSelector)) {
event.preventDefault();
event.stopPropagation();
}
}
updateDropdownAccessibility() {
// Only run if hasHeaderClass() is true
if (!this.hasHeaderClass() || !this.cachedElements.dropdowns) return;
this.cachedElements.dropdowns.forEach(dropdown => {
const content = dropdown.querySelector(this.config.dropdownContentSelector);
const button = dropdown.querySelector('button');
// Check if dropdown has all active classes
const isOpen = this.hasAllActiveClasses(dropdown);
if (content) {
if (isOpen) {
content.removeAttribute('inert');
} else {
content.setAttribute('inert', '');
}
}
if (button) {
button.setAttribute('aria-expanded', isOpen ? 'true' : 'false');
}
});
}
}
const sidebarNav = new SidebarNavigation().init();
Metro Vancouver Excavation Services
Precision Excavation Services Across Metro Vancouver
From Lot Clearing to Final Grade – Trusted Excavation Services for Residential, Strata & Commercial Projects
Video, Excavation, Demolition & Site Preparation Overview
A project compilation showing VALROC Development Ltd. performing excavation, demolition, trucking, grading, drainage preparation, asphalt removal, and site preparation services across Metro Vancouver and the Fraser Valley.
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Host: Vimeo
Video Duration :37sec
All Excavation Services
At VALROC, our construction services are designed to integrate seamlessly, giving you the flexibility to explore complementary solutions today or scale your project tomorrow.
At VALROC, our excavation and site preparation services are built on versatility, experience, and precision. With projects completed across Burnaby, Langley, Maple Ridge, and Delta (including Annacis Island), and throughout the Metro Vancouver region, we’ve handled everything from full home demolitions to complex underground utility relocations, safely, efficiently, and to specification.
Our fleet includes large and compact excavators, dump trucks, motorized track dumpers, rotary laser systems for elevation and grade, mobile service trucks, and dedicated site-prep equipment, allowing us to scale from simple residential work to multi-phase commercial developments.
Land clearing, full house demolitions, and debris recycling/hauling
Trenching and complex underground utility installations/relocations
Foundation excavation, backfill, and structural pad prep
Rough/finished grading with laser-set elevations
Site preload, compaction, and ground improvement for development
Erosion control and concrete block retaining solutions
Residential, strata, and commercial project delivery across Metro Vancouver
WorkSafe BC compliance, coordinated permitting, and traffic/site safety
Who We Serve
Who We Build For
Every project is different, and so are the people behind it. From homeowners and strata corporations to commercial property owners and developers, we tailor our construction services to the unique needs of every client. Explore how we support each customer type below.
Excavation site in Metro Vancouver with heavy construction equipment and workers preparing for infrastructure development.
Free on-site estimates and practical construction advice.
Every successful construction project starts with proper site preparation. Whether you’re building an addition, installing drainage, constructing a retaining wall, preparing for new concrete or asphalt, or developing an entirely new space, quality excavation creates the stable foundation every project depends on.
At VALROC, we approach excavation with precision and planning. From demolition and land clearing to trenching, grading, foundation excavation, and site preparation, our experienced team uses modern equipment and laser-guided elevations to prepare your property safely, efficiently, and ready for the next stage of construction.
Excavation work in progress at a construction site in Metro Vancouver, BC with heavy machinery and safety barriers.
Professional planning that minimizes disruption to residents.
Safe, clearly defined work zones and pedestrian access.
Experienced crews equipped for projects of every size.
Integrated excavation, drainage, and site preparation solutions.
Free on-site meetings with practical recommendations for your property.
Excavation within occupied strata communities requires careful planning, communication, and attention to safety. Whether you’re replacing underground utilities, improving drainage, preparing for retaining walls, repairing roadways, or completing larger capital improvements, every project must balance construction efficiency with the needs of residents.
VALROC works with strata councils and property managers throughout Metro Vancouver to deliver excavation services with minimal disruption. From trenching and utility excavation to grading, drainage preparation, foundation work, and site restoration, our experienced team coordinates every stage while maintaining safe pedestrian access and organized work zones.
Trench excavation work by construction workers at a Vancouver site.
Flexible scheduling to reduce operational downtime.
Modern equipment suited to projects of every size.
Experienced crews with comprehensive safety procedures.
Integrated excavation, demolition, drainage, and site preparation services.
Professional site assessments and free on-site consultations.
Commercial excavation demands experience, planning, and the right equipment. Whether you’re preparing a development site, relocating underground services, replacing aging infrastructure, expanding facilities, or supporting a larger construction project, every phase must be completed safely, efficiently, and with minimal disruption to your operations.
VALROC operates a diverse fleet of construction equipment, including excavators, skid steers, dump trucks, compactors, rollers, hydraulic breakers, and specialized support equipment, allowing us to complete projects of varying size and complexity. From utility relocations and site preparation to grading, demolition, and excavation for concrete, drainage, and structural construction, our in-house team delivers practical solutions backed by experienced project management.
Client Experiences
Real Clients. Real Projects. Real Results.
Every successful project is measured by more than the finished construction. From homeowners and strata councils to commercial property managers, our clients trust VALROC to deliver quality workmanship, clear communication, and dependable service. Here are a few of the experiences they’ve shared after working with our team.
VALROC was offered additional scope including preload, site services, rerouting storm mains, fibre optics, 25 kVA power supply to the facility, and including installing all foundation / footings for a large industrial building extension
Every successful construction project starts with the right plan. Tell us about your project, and we’ll arrange a professional on-site consultation to discuss your options, answer your questions, and provide a detailed estimate based on your property’s unique requirements.
Excavation and construction work by VALROC in Metro Vancouver.
