展开微件

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// Create a BasemapGallery widget instance and set
// its container to a div element

const basemapGallery = new BasemapGallery({
  view: view,
  container: document.createElement("div")
});

// Create an Expand instance and set the content
// property to the DOM node of the basemap gallery widget

const bgExpand = new Expand({
  view: view,
  content: basemapGallery
});

// Add the expand instance to the ui

view.ui.add(bgExpand, "top-right");