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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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* Adapted from: https://github.com/fred-wang/mathml.css */
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(function () {
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window.addEventListener("load", function () {
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var box, div, link, namespaceURI;
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// First check whether the page contains any <math> element.
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namespaceURI = "http://www.w3.org/1998/Math/MathML";
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// Create a div to test mspace, using Kuma's "offscreen" CSS
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document.body.insertAdjacentHTML(
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"afterbegin",
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"<div style='border: 0; clip: rect(0 0 0 0); height: 1px; margin: -1px; overflow: hidden; padding: 0; position: absolute; width: 1px;'><math xmlns='" +
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namespaceURI +
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"'><mspace height='23px' width='77px'></mspace></math></div>",
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);
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div = document.body.firstChild;
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box = div.firstChild.firstChild.getBoundingClientRect();
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document.body.removeChild(div);
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if (Math.abs(box.height - 23) > 1 || Math.abs(box.width - 77) > 1) {
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window.supportsMathML = false;
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}
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});
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})();
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