mirror of
https://github.com/squidfunk/mkdocs-material.git
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82 lines
2.9 KiB
TypeScript
82 lines
2.9 KiB
TypeScript
/*
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* Copyright (c) 2016-2019 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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/* ----------------------------------------------------------------------------
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* Helper functions
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* ------------------------------------------------------------------------- */
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/**
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* Check if browser supports the `<details>` tag
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*
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* As this polyfill is executed at the end of `<body>`, not all checks from the
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* original source were necessary, so the script was stripped down a little.
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*
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* @see https://bit.ly/2O1teyP - Original source
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*
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* @return Test result
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*/
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function isSupported(): boolean {
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const details = document.createElement("details")
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if (!("open" in details))
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return false
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/* Insert summary and append element */
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details.innerHTML = "<summary>_</summary>_"
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details.style.display = "block"
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document.body.appendChild(details)
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/* Measure height difference */
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const h0 = details.offsetHeight
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details.open = true
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const h1 = details.offsetHeight
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/* Remove element and return test result */
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document.body.removeChild(details)
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return h1 - h0 !== 0
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}
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/* ----------------------------------------------------------------------------
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* Polyfill
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* ------------------------------------------------------------------------- */
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/* Execute polyfill when DOM is available */
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document.addEventListener("DOMContentLoaded", () => {
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if (isSupported())
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return
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/* Indicate presence of details polyfill */
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document.documentElement.classList.add("no-details")
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/* Retrieve all summaries and polyfill open/close functionality */
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const summaries = document.querySelectorAll("details > summary")
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summaries.forEach(summary => {
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summary.addEventListener("click", () => {
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const details = summary.parentNode as HTMLElement
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if (details.hasAttribute("open")) {
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details.removeAttribute("open")
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} else {
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details.setAttribute("open", "")
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}
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})
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})
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})
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