SelectorQuery.selectViewport

Introduction

Selects the display area and can be used to obtain information such as the size and scroll position of the display area. It returns a NodesRef object instance.

Parameters

None

Return Value

NodesRef

Sample Code

Page({
  selectViewport() {
    dlt
      .createSelectorQuery()
      .selectViewport()
      .scrollOffset((res) => {
        console.log('Node Information:', res);
        // res.id      // Node's ID
        // res.dataset // Node's dataset
        // res.scrollLeft // Node's horizontal scroll position
        // res.scrollTop  // Node's vertical scroll position
      })
      .exec();
  },
});