52 lines
1.9 KiB
JavaScript
52 lines
1.9 KiB
JavaScript
/*
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* Copyright (C) 2016 - present Instructure, Inc.
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*
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* This file is part of Canvas.
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*
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* Canvas is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Affero General Public License as published by the Free
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* Software Foundation, version 3 of the License.
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*
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* Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Affero General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Preface: This is a horrible terrible function and should only be used
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* in the most dire circumstances. In fact, it probably shouldn't
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* exist at all.
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*
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* This function will cause a given DOM node to be completely thrown away and
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* re-rendered. This is helpful to screenreaders because JavaScripty stuff
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* doesn't work so well. They generally read the page once and call it good.
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*
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*
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* *******PLEASE REMOVE THIS FUNCTION WHENEVER IT CAN BE DONE*******
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*/
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const forceScreenreaderToReparse = node => {
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// Save the scroll position since the thrash will cause the browser to scroll
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// to the top.
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const YscrollPosition = window.scrollY
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const XscrollPosition = window.scrollX
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// Thrash the DOM for the node we've been given.
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if (!node.style) {
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node.setAttribute('style', ' ')
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}
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const oldDisplay = node.style.display || ''
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node.style.display = 'none'
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// We just access this property to force recalculation of data and a redraw
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node.offsetHeight
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node.style.display = oldDisplay
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// Force the browser to scroll back to the original position.
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window.scroll(XscrollPosition, YscrollPosition)
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}
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export default forceScreenreaderToReparse
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