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/*
* Copyright (c) 2016-2023 Martin Donath <martin.donath@squidfunk.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/* ----------------------------------------------------------------------------
* Functions
* ------------------------------------------------------------------------- */
/**
* Retrieve all elements matching the query selector
*
* @template T - Element type
*
* @param selector - Query selector
* @param node - Node of reference
*
* @returns Elements
*/
export function getElements<T extends keyof HTMLElementTagNameMap>(
selector: T, node?: ParentNode
): HTMLElementTagNameMap[T][]
export function getElements<T extends HTMLElement>(
selector: string, node?: ParentNode
): T[]
export function getElements<T extends HTMLElement>(
selector: string, node: ParentNode = document
): T[] {
return Array.from(node.querySelectorAll<T>(selector))
}
/**
* Retrieve an element matching a query selector or throw a reference error
*
* Note that this function assumes that the element is present. If unsure if an
* element is existent, use the `getOptionalElement` function instead.
*
* @template T - Element type
*
* @param selector - Query selector
* @param node - Node of reference
*
* @returns Element
*/
export function getElement<T extends keyof HTMLElementTagNameMap>(
selector: T, node?: ParentNode
): HTMLElementTagNameMap[T]
export function getElement<T extends HTMLElement>(
selector: string, node?: ParentNode
): T
export function getElement<T extends HTMLElement>(
selector: string, node: ParentNode = document
): T {
const el = getOptionalElement<T>(selector, node)
if (typeof el === "undefined")
throw new ReferenceError(
`Missing element: expected "${selector}" to be present`
)
/* Return element */
return el
}
/* ------------------------------------------------------------------------- */
/**
* Retrieve an optional element matching the query selector
*
* @template T - Element type
*
* @param selector - Query selector
* @param node - Node of reference
*
* @returns Element or nothing
*/
export function getOptionalElement<T extends keyof HTMLElementTagNameMap>(
selector: T, node?: ParentNode
): HTMLElementTagNameMap[T] | undefined
export function getOptionalElement<T extends HTMLElement>(
selector: string, node?: ParentNode
): T | undefined
export function getOptionalElement<T extends HTMLElement>(
selector: string, node: ParentNode = document
): T | undefined {
return node.querySelector<T>(selector) || undefined
}
/**
* Retrieve the currently active element
*
* @returns Element or nothing
*/
export function getActiveElement(): HTMLElement | undefined {
return document.activeElement instanceof HTMLElement
? document.activeElement || undefined
: undefined
}
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