export default function getViewport()

in packages/mere-dom/src/util/get-viewport.ts [15:41]

• 25 lines of code
• 8 McCabe index (conditional complexity)

export default function getViewport(): IViewport {
  let scrollTop;
  let scrollLeft;
  let width;
  let height;
  
  if (window.visualViewport) {
    ({
      pageTop: scrollTop,
      pageLeft: scrollLeft,
      width, // 不包含滚轴宽度
      height
    } = window.visualViewport);
  } else {
    width = document.documentElement.clientWidth;
    height = document.documentElement.clientHeight;
    scrollTop = window.scrollY || document.documentElement.scrollTop;
    scrollLeft = window.scrollX || document.documentElement.scrollLeft;
  }
  
  return {
    width: Math.round(width) || 0,
    height: Math.round(height) || 0,
    scrollTop: Math.round(scrollTop) || 0,
    scrollLeft: Math.round(scrollLeft) || 0
  };
}