109 lines
4.2 KiB
JavaScript
109 lines
4.2 KiB
JavaScript
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// src/scripts/isElementClickable.ts
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function isElementClickable(elem) {
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if (!elem.getBoundingClientRect || !elem.scrollIntoView || !elem.contains || !elem.getClientRects || !document.elementFromPoint) {
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return false;
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}
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const isOldEdge = !!window.StyleMedia;
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const scrollIntoViewFullSupport = !(window.safari || isOldEdge);
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function getOverlappingElement(elem2, context) {
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context = context || document;
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const elemDimension = elem2.getBoundingClientRect();
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const x = elemDimension.left + elem2.clientWidth / 2;
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const y = elemDimension.top + elem2.clientHeight / 2;
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return context.elementFromPoint(x, y);
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}
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function getOverlappingRects(elem2, context) {
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context = context || document;
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const rects = elem2.getClientRects();
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const rect = rects[0];
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const x = rect.left + rect.width / 2;
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const y = rect.top + rect.height / 2;
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return [context.elementFromPoint(x, y)];
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}
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function getOverlappingElements(elem2, context) {
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return [getOverlappingElement(elem2, context)].concat(getOverlappingRects(elem2, context));
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}
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function nodeContains(elem2, otherNode) {
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if (isOldEdge) {
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let tmpElement = otherNode;
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while (tmpElement) {
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if (tmpElement === elem2) {
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return true;
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}
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tmpElement = tmpElement.parentNode;
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if (tmpElement && tmpElement.nodeType === 11 && tmpElement.host) {
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tmpElement = tmpElement.host;
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}
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}
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return false;
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}
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return elem2.contains(otherNode);
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}
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function isOverlappingElementMatch(elementsFromPoint, elem2) {
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if (elementsFromPoint.some(function(elementFromPoint) {
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return elementFromPoint === elem2 || nodeContains(elem2, elementFromPoint);
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})) {
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return true;
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}
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let elemsWithShadowRoot = [].concat(elementsFromPoint);
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elemsWithShadowRoot = elemsWithShadowRoot.filter(function(x) {
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return x && x.shadowRoot && x.shadowRoot.elementFromPoint;
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});
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let shadowElementsFromPoint = [];
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for (let i = 0; i < elemsWithShadowRoot.length; ++i) {
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const shadowElement = elemsWithShadowRoot[i];
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shadowElementsFromPoint = shadowElementsFromPoint.concat(
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getOverlappingElements(elem2, shadowElement.shadowRoot)
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);
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}
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shadowElementsFromPoint = [].concat(shadowElementsFromPoint);
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shadowElementsFromPoint = shadowElementsFromPoint.filter(function(x) {
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return !elementsFromPoint.includes(x);
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});
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if (shadowElementsFromPoint.length === 0) {
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return false;
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}
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return isOverlappingElementMatch(shadowElementsFromPoint, elem2);
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}
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function isElementInViewport(elem2) {
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if (!elem2.getBoundingClientRect) {
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return false;
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}
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const rect = elem2.getBoundingClientRect();
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const windowHeight = window.innerHeight || document.documentElement.clientHeight;
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const windowWidth = window.innerWidth || document.documentElement.clientWidth;
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const vertInView = rect.top < windowHeight && rect.top + rect.height > 0;
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const horInView = rect.left < windowWidth && rect.left + rect.width > 0;
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return vertInView && horInView;
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}
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function isEnabled(elem2) {
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return elem2.disabled !== true;
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}
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function hasOverlaps(elem2) {
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return !isOverlappingElementMatch(getOverlappingElements(elem2), elem2);
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}
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function isFullyDisplayedInViewport(elem2) {
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return isElementInViewport(elem2) && !hasOverlaps(elem2);
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}
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function getViewportScrollPositions() {
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return {
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x: window.scrollX !== null && window.scrollX !== void 0 ? window.scrollX : window.pageXOffset,
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y: window.scrollY !== null && window.scrollY !== void 0 ? window.scrollY : window.pageYOffset
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};
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}
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let _isFullyDisplayedInViewport = isFullyDisplayedInViewport(elem);
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if (!_isFullyDisplayedInViewport) {
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const { x: originalX, y: originalY } = getViewportScrollPositions();
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elem.scrollIntoView(scrollIntoViewFullSupport ? { block: "center", inline: "center" } : false);
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_isFullyDisplayedInViewport = isFullyDisplayedInViewport(elem);
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const { x: currentX, y: currentY } = getViewportScrollPositions();
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if (currentX !== originalX || currentY !== originalY) {
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window.scroll(originalX, originalY);
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}
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}
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return _isFullyDisplayedInViewport && isEnabled(elem);
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}
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export {
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isElementClickable as default
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};
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