Zoom-dependent Layers

Theme:

This example loads a PDF that contains several optional content layers with visibility depending on the current viewer zoom. Change the zoom factor to see the viewer automatically switch layers.


window.onload = function(){	
	//DsPdfViewer.LicenseKey = "***key***";
	const viewer = new DsPdfViewer("#viewer");	
	viewer.toolbarLayout.viewer.mobile = viewer.toolbarLayout.viewer.default = ["open", "zoom", "download", "about"];
	const layersPanelHandle = viewer.addLayersPanel();
	viewer.open("/document-solutions/javascript-pdf-viewer/demos/product-bundles/assets/pdf/zoom-layers.pdf").then(()=> {
		viewer.leftSidebar.menu.panels.open(layersPanelHandle.id)
		viewer.leftSidebar.menu.panels.pin(layersPanelHandle.id);
	});	
}

window.onload = function(){	
//DsPdfViewer.LicenseKey = "***key***";
const viewer = new DsPdfViewer("#viewer");	
viewer.toolbarLayout.viewer.mobile = viewer.toolbarLayout.viewer.default = ["open", "zoom", "download", "about"];
const layersPanelHandle = viewer.addLayersPanel();
viewer.open("/document-solutions/javascript-pdf-viewer/demos/product-bundles/assets/pdf/zoom-layers.pdf").then(()=> {
viewer.leftSidebar.menu.panels.open(layersPanelHandle.id)
viewer.leftSidebar.menu.panels.pin(layersPanelHandle.id);
});	
}

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Zoom-dependent Optional content layers</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="./src/styles.css">	
<script src="/document-solutions/javascript-pdf-viewer/demos/product-bundles/build/dspdfviewer.js"></script>
<script src="/document-solutions/javascript-pdf-viewer/demos/product-bundles/build/wasmSupportApi.js"></script>
<script src="/document-solutions/javascript-pdf-viewer/demos/resource/js/init.js"></script>
<script src="./src/app.js"></script>
</head>
<body>
<div id="viewer"></div>
</body>
</html>

#viewer {
height: 100%;
}