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

»Æ´óÏɸßÊÖÂÛ̳

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); })(); Yvonne Ferwerda | »Æ´óÏɸßÊÖÂÛ̳

»Æ´óÏɸßÊÖÂÛ̳

Skip to main content

Yvonne Ferwerda

Director, Van Lunen Center

Professional Experience

Yvonne began her career with the Van Lunen Center as the first employee hired by the founding director in 2007. She was appointed for two years as interim director in July of 2017. In 2009 Yvonne completed an interdisciplinary bachelor’s degree in English, Elementary Education, and Communications Arts and Sciences at Calvin College in Grand Rapids, Michigan. She completed her master’s degree in Educational Leadership at Calvin in 2016, and is a Certified School Administrator in the state of Michigan. Yvonne has also taken courses towards a Certificate in Advanced Educational Leadership at the Harvard Graduate School in Education – Leading Learning and Driving Change. Yvonne’s passion is in Christian education, with a strong interest in urban education. She attended Christian schools from kindergarten through college, as well as Elmhurst College in Illinois.