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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.
*/
import {
Observable,
defer,
finalize,
fromEvent,
map,
merge,
switchMap,
take,
throwError
} from "rxjs"
import { h } from "~/utilities"
/* ----------------------------------------------------------------------------
* Functions
* ------------------------------------------------------------------------- */
/**
* Create and load a `script` element
*
* This function returns an observable that will emit when the script was
* successfully loaded, or throw an error if it wasn't.
*
* @param src - Script URL
*
* @returns Script observable
*/
export function watchScript(src: string): Observable<void> {
const script = h("script", { src })
return defer(() => {
document.head.appendChild(script)
return merge(
fromEvent(script, "load"),
fromEvent(script, "error")
.pipe(
switchMap(() => (
throwError(() => new ReferenceError(`Invalid script: ${src}`))
))
)
)
.pipe(
map(() => undefined),
finalize(() => document.head.removeChild(script)),
take(1)
)
})
}
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