, but this code // executes before the first paint, when

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is not yet present. The // classes are added to so styling immediately reflects the current // toolbar state. The classes are removed after the toolbar completes // initialization. const classesToAdd = ['toolbar-loading', 'toolbar-anti-flicker']; if (toolbarState) { const { orientation, hasActiveTab, isFixed, activeTray, activeTabId, isOriented, userButtonMinWidth } = toolbarState; classesToAdd.push( orientation ? `toolbar-` + orientation + `` : 'toolbar-horizontal', ); if (hasActiveTab !== false) { classesToAdd.push('toolbar-tray-open'); } if (isFixed) { classesToAdd.push('toolbar-fixed'); } if (isOriented) { classesToAdd.push('toolbar-oriented'); } if (activeTray) { // These styles are added so the active tab/tray styles are present // immediately instead of "flickering" on as the toolbar initializes. In // instances where a tray is lazy loaded, these styles facilitate the // lazy loaded tray appearing gracefully and without reflow. const styleContent = ` .toolbar-loading #` + activeTabId + ` { background-image: linear-gradient(rgba(255, 255, 255, 0.25) 20%, transparent 200%); } .toolbar-loading #` + activeTabId + `-tray { display: block; box-shadow: -1px 0 5px 2px rgb(0 0 0 / 33%); border-right: 1px solid #aaa; background-color: #f5f5f5; z-index: 0; } .toolbar-loading.toolbar-vertical.toolbar-tray-open #` + activeTabId + `-tray { width: 15rem; height: 100vh; } .toolbar-loading.toolbar-horizontal :not(#` + activeTray + `) > .toolbar-lining {opacity: 0}`; const style = document.createElement('style'); style.textContent = styleContent; style.setAttribute('data-toolbar-anti-flicker-loading', true); document.querySelector('head').appendChild(style); if (userButtonMinWidth) { const userButtonStyle = document.createElement('style'); userButtonStyle.textContent = `#toolbar-item-user {min-width: ` + userButtonMinWidth +`px;}` document.querySelector('head').appendChild(userButtonStyle); } } } document.querySelector('html').classList.add(...classesToAdd); })(); Matthew Dykstra | 黄大仙高手论坛

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Mr. Matthew Dykstra

Managing Director

Education

  • B.A., Biology, May 1996, Trinity Christian College, Palos Heights, Illinois
  • M.S., Natural Resources and Environmental Sciences, August 1999, University of Illinois at
    Urbana-Champaign

Professional Experience

  • 2007-2024 Field Station and Community Program Manager at Pierce Cedar Creek Institute
  • 2006 ScienceTeacher at North Hills Academy
  • 2005 Adjunct Professor at Grand Valley State University
  • 2001-2005 Water Quality Educator with Michigan State University Extension

Academic Interests

I have a particular interest in Natural Areas Management and the natural history of the Great Lakes landscape. I love learning about the many species that call this area home and how best we can provide for their long-term survival. I have a special interest in native plants, especially rare and unusual plants. I am also a big fan of prescribed fire as a tool for managing ecosystems.

Jacob DeJong

Contact Me

616-526-7600
108B Bunker Interpretive Center

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