fix: resolve compilation errors, fix lock_scroll path, and enhance DataTable attributes
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spinline
253
frontend/public/lock_scroll.js
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253
frontend/public/lock_scroll.js
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/**
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* Scroll Lock Utility
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* Handles locking and unlocking scroll for both window and all scrollable containers
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* Similar to react-remove-scroll but in vanilla JavaScript
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*/
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(() => {
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// Prevent multiple initializations
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if (window.ScrollLock) {
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return;
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}
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class ScrollLock {
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constructor() {
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this.locked = false;
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this.scrollableElements = [];
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this.scrollPositions = new Map();
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this.originalStyles = new Map();
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this.fixedElements = [];
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}
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/**
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* Find all scrollable elements in the DOM (optimized)
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* Uses more targeted selectors instead of querying all elements
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*/
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findScrollableElements() {
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const scrollables = [];
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// More targeted query - only look for elements with overflow properties
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const candidates = document.querySelectorAll(
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'[style*="overflow"], [class*="overflow"], [class*="scroll"], main, aside, section, div',
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);
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// Batch all style reads first to minimize reflows
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const elementsToCheck = [];
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for (const el of candidates) {
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// Skip the element itself or if it's inside these containers
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const dataName = el.getAttribute("data-name");
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const isExcludedElement =
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dataName === "ScrollArea" ||
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dataName === "CommandList" ||
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dataName === "SelectContent" ||
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dataName === "MultiSelectContent" ||
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dataName === "DropdownMenuContent" ||
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dataName === "ContextMenuContent";
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if (
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el !== document.body &&
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el !== document.documentElement &&
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!isExcludedElement &&
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!el.closest('[data-name="ScrollArea"]') &&
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!el.closest('[data-name="CommandList"]') &&
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!el.closest('[data-name="SelectContent"]') &&
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!el.closest('[data-name="MultiSelectContent"]') &&
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!el.closest('[data-name="DropdownMenuContent"]') &&
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!el.closest('[data-name="ContextMenuContent"]')
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) {
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elementsToCheck.push(el);
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}
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}
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// Now batch read all computed styles and dimensions
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elementsToCheck.forEach((el) => {
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const style = window.getComputedStyle(el);
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const hasOverflow =
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style.overflow === "auto" ||
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style.overflow === "scroll" ||
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style.overflowY === "auto" ||
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style.overflowY === "scroll";
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// Only check scrollHeight if overflow is set
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if (hasOverflow && el.scrollHeight > el.clientHeight) {
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scrollables.push(el);
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}
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});
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return scrollables;
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}
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/**
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* Lock scrolling on all scrollable elements (optimized)
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* Batches all DOM reads before DOM writes to prevent forced reflows
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*/
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lock() {
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if (this.locked) return;
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this.locked = true;
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// Find all scrollable elements
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this.scrollableElements = this.findScrollableElements();
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// ===== BATCH 1: READ PHASE - Read all layout properties first =====
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const windowScrollY = window.scrollY;
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const scrollbarWidth = window.innerWidth - document.body.clientWidth;
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// Store window scroll position
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this.scrollPositions.set("window", windowScrollY);
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// Store original body styles
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this.originalStyles.set("body", {
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position: document.body.style.position,
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top: document.body.style.top,
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width: document.body.style.width,
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overflow: document.body.style.overflow,
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paddingRight: document.body.style.paddingRight,
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});
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// Read all fixed-position elements and their padding (only if we have scrollbar)
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if (scrollbarWidth > 0) {
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// Use more targeted query for fixed elements
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const fixedCandidates = document.querySelectorAll(
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'[style*="fixed"], [class*="fixed"], header, nav, aside, [role="dialog"], [role="alertdialog"]',
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);
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this.fixedElements = Array.from(fixedCandidates).filter((el) => {
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const style = window.getComputedStyle(el);
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return (
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style.position === "fixed" &&
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!el.closest('[data-name="DropdownMenuContent"]') &&
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!el.closest('[data-name="MultiSelectContent"]') &&
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!el.closest('[data-name="ContextMenuContent"]')
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);
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});
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// Batch read all padding values
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this.fixedElements.forEach((el) => {
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const computedStyle = window.getComputedStyle(el);
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const currentPadding = Number.parseInt(computedStyle.paddingRight, 10) || 0;
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this.originalStyles.set(el, {
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paddingRight: el.style.paddingRight,
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computedPadding: currentPadding,
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});
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});
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}
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// Read scrollable elements info
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const scrollableInfo = this.scrollableElements.map((el) => {
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const scrollTop = el.scrollTop;
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const elementScrollbarWidth = el.offsetWidth - el.clientWidth;
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const computedStyle = window.getComputedStyle(el);
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const currentPadding = Number.parseInt(computedStyle.paddingRight, 10) || 0;
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this.scrollPositions.set(el, scrollTop);
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this.originalStyles.set(el, {
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overflow: el.style.overflow,
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overflowY: el.style.overflowY,
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paddingRight: el.style.paddingRight,
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});
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return { el, elementScrollbarWidth, currentPadding };
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});
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// ===== BATCH 2: WRITE PHASE - Apply all styles at once =====
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// Apply body lock
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document.body.style.position = "fixed";
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document.body.style.top = `-${windowScrollY}px`;
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document.body.style.width = "100%";
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document.body.style.overflow = "hidden";
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if (scrollbarWidth > 0) {
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document.body.style.paddingRight = `${scrollbarWidth}px`;
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// Apply padding compensation to fixed elements
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this.fixedElements.forEach((el) => {
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const stored = this.originalStyles.get(el);
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if (stored) {
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el.style.paddingRight = `${stored.computedPadding + scrollbarWidth}px`;
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}
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});
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}
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// Lock all scrollable containers
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scrollableInfo.forEach(({ el, elementScrollbarWidth, currentPadding }) => {
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el.style.overflow = "hidden";
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if (elementScrollbarWidth > 0) {
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el.style.paddingRight = `${currentPadding + elementScrollbarWidth}px`;
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}
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});
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}
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/**
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* Unlock scrolling on all elements (optimized)
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* @param {number} delay - Delay in milliseconds before unlocking (for animations)
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*/
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unlock(delay = 0) {
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if (!this.locked) return;
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const performUnlock = () => {
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// Restore body scroll
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const bodyStyles = this.originalStyles.get("body");
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if (bodyStyles) {
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document.body.style.position = bodyStyles.position;
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document.body.style.top = bodyStyles.top;
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document.body.style.width = bodyStyles.width;
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document.body.style.overflow = bodyStyles.overflow;
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document.body.style.paddingRight = bodyStyles.paddingRight;
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}
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// Restore window scroll position
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const windowScrollY = this.scrollPositions.get("window") || 0;
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window.scrollTo(0, windowScrollY);
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// Restore all scrollable containers
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this.scrollableElements.forEach((el) => {
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const originalStyles = this.originalStyles.get(el);
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if (originalStyles) {
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el.style.overflow = originalStyles.overflow;
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el.style.overflowY = originalStyles.overflowY;
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el.style.paddingRight = originalStyles.paddingRight;
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}
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// Restore scroll position
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const scrollPosition = this.scrollPositions.get(el) || 0;
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el.scrollTop = scrollPosition;
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});
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// Restore fixed-position elements padding
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this.fixedElements.forEach((el) => {
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const styles = this.originalStyles.get(el);
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if (styles && styles.paddingRight !== undefined) {
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el.style.paddingRight = styles.paddingRight;
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}
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});
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// Clear storage
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this.scrollableElements = [];
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this.fixedElements = [];
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this.scrollPositions.clear();
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this.originalStyles.clear();
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this.locked = false;
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};
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if (delay > 0) {
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setTimeout(performUnlock, delay);
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} else {
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performUnlock();
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}
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}
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/**
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* Check if scrolling is currently locked
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*/
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isLocked() {
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return this.locked;
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}
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}
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// Export as singleton
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window.ScrollLock = new ScrollLock();
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})();
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