mldong-flow-designer-plus/lib/scroll-CYVj_8on.js

本项目包含了作者为B站课堂视频[《工作流设计器开发最佳实践》](https://www.bilibili.com/cheese/play/ss24484)的过程源码。教程中开发的组件也可用于实际生产环境中。以下是和使用文档和课程章节说明。 ## 实战项目 [演示地址](https://flow-pro.mldong.com/)

import { m as isClient } from "./error-DEV4o0cD.js";
let scrollBarWidth;
const getScrollBarWidth = (namespace) => {
  var _a;
  if (!isClient) return 0;
  if (scrollBarWidth !== void 0) return scrollBarWidth;
  const outer = document.createElement("div");
  outer.className = `${namespace}-scrollbar__wrap`;
  outer.style.visibility = "hidden";
  outer.style.width = "100px";
  outer.style.position = "absolute";
  outer.style.top = "-9999px";
  document.body.appendChild(outer);
  const widthNoScroll = outer.offsetWidth;
  outer.style.overflow = "scroll";
  const inner = document.createElement("div");
  inner.style.width = "100%";
  outer.appendChild(inner);
  const widthWithScroll = inner.offsetWidth;
  (_a = outer.parentNode) == null ? void 0 : _a.removeChild(outer);
  scrollBarWidth = widthNoScroll - widthWithScroll;
  return scrollBarWidth;
};
function scrollIntoView(container, selected) {
  if (!isClient) return;
  if (!selected) {
    container.scrollTop = 0;
    return;
  }
  const offsetParents = [];
  let pointer = selected.offsetParent;
  while (pointer !== null && container !== pointer && container.contains(pointer)) {
    offsetParents.push(pointer);
    pointer = pointer.offsetParent;
  }
  const top = selected.offsetTop + offsetParents.reduce((prev, curr) => prev + curr.offsetTop, 0);
  const bottom = top + selected.offsetHeight;
  const viewRectTop = container.scrollTop;
  const viewRectBottom = viewRectTop + container.clientHeight;
  if (top < viewRectTop) container.scrollTop = top;
  else if (bottom > viewRectBottom) container.scrollTop = bottom - container.clientHeight;
}
export {
  getScrollBarWidth as g,
  scrollIntoView as s
};
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