eewing
63 lines
2.0 KiB
JavaScript
63 lines
2.0 KiB
JavaScript
export const isBrowser = typeof document !== "undefined";
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export const isIOS = getIsIOS();
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function getIsIOS() {
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return (isBrowser &&
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window?.navigator?.userAgent &&
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(/iP(ad|hone|od)/.test(window.navigator.userAgent) ||
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// The new iPad Pro Gen3 does not identify itself as iPad, but as Macintosh.
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(window?.navigator?.maxTouchPoints > 2 &&
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/iPad|Macintosh/.test(window?.navigator.userAgent))));
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}
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export function isFunction(value) {
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return typeof value === "function";
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}
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export function isHTMLElement(element) {
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return element instanceof HTMLElement;
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}
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export function isElement(element) {
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return element instanceof Element;
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}
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export function isElementOrSVGElement(element) {
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return element instanceof Element || element instanceof SVGElement;
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}
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export function isNumberString(value) {
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return !Number.isNaN(Number(value)) && !Number.isNaN(Number.parseFloat(value));
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}
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export function isNull(value) {
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return value === null;
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}
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export function isTouch(e) {
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return e.pointerType === "touch";
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}
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export function isFocusVisible(element) {
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return element.matches(":focus-visible");
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}
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export function isNotNull(value) {
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return value !== null;
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}
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/**
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* Determines if the provided object is a valid `HTMLInputElement` with
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* a `select` method available.
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*/
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export function isSelectableInput(element) {
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return element instanceof HTMLInputElement && "select" in element;
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}
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/**
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* Given a node, determine if it is hidden by walking up the
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* DOM tree until we hit the `stopAt` node (exclusive), if provided)
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* otherwise we stop at the document root.
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*/
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export function isElementHidden(node, stopAt) {
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if (getComputedStyle(node).visibility === "hidden")
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return true;
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while (node) {
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// we stop at `upTo` (excluding it)
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if (stopAt !== undefined && node === stopAt)
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return false;
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if (getComputedStyle(node).display === "none")
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return true;
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node = node.parentElement;
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}
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return false;
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}
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