mirror of
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72 lines
2.4 KiB
TypeScript
72 lines
2.4 KiB
TypeScript
/*
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* Copyright (c) 2016-2020 Martin Donath <martin.donath@squidfunk.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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import { Observable, fromEvent } from "rxjs"
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import { filter, map, share, startWith } from "rxjs/operators"
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/* ----------------------------------------------------------------------------
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* Functions
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* ------------------------------------------------------------------------- */
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/**
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* Retrieve location hash
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*
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* @return Location hash
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*/
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export function getLocationHash(): string {
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return location.hash.substring(1)
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}
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/**
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* Set location hash
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*
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* Setting a new fragment identifier via `location.hash` will have no effect
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* if the value doesn't change. When a new fragment identifier is set, we want
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* the browser to target the respective element at all times, which is why we
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* use this dirty little trick.
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*
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* @param hash - Location hash
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*/
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export function setLocationHash(hash: string): void {
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const el = document.createElement("a")
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el.href = hash
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el.addEventListener("click", ev => ev.stopPropagation())
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el.click()
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}
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/* ------------------------------------------------------------------------- */
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/**
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* Watch location hash
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*
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* @return Location hash observable
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*/
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export function watchLocationHash(): Observable<string> {
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return fromEvent<HashChangeEvent>(window, "hashchange")
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.pipe(
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map(getLocationHash),
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startWith(getLocationHash()),
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filter(hash => hash.length > 0),
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share()
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)
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}
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