shu-c-view/packages/anchor/utils/assist.js

rollup 打包vue组件库框架

// scrollTop animation
// eslint-disable-next-line import/group-exports
export function scrollTop(el, from = 0, to, duration = 500, endCallback) {
  if (!window.requestAnimationFrame) {
    window.requestAnimationFrame =
      window.webkitRequestAnimationFrame ||
      window.mozRequestAnimationFrame ||
      window.msRequestAnimationFrame ||
      function(callback) {
        return window.setTimeout(callback, 1000 / 60);
      };
  }
  const difference = Math.abs(from - to);
  const step = Math.ceil((difference / duration) * 50);

  function scroll(start, end, step) {
    if (start === end) {
      endCallback && endCallback();
      return;
    }

    let d = start + step > end ? end : start + step;
    if (start > end) {
      d = start - step < end ? end : start - step;
    }

    if (el === window) {
      window.scrollTo(d, d);
    } else {
      el.scrollTop = d;
    }
    window.requestAnimationFrame(() => scroll(d, end, step));
  }
  scroll(from, to, step);
}

// Find components downward
// eslint-disable-next-line import/group-exports
export function findComponentsDownward(
  context,
  componentName,
  ignoreComponentNames = []
) {
  if (!Array.isArray(ignoreComponentNames)) {
    ignoreComponentNames = [ignoreComponentNames];
  }
  return context.$children.reduce((components, child) => {
    if (child.$options.name === componentName) components.push(child);
    if (ignoreComponentNames.indexOf(child.$options.name) < 0) {
      const foundChilds = findComponentsDownward(child, componentName);
      return components.concat(foundChilds);
    } else {
      return components;
    }
  }, []);
}

// eslint-disable-next-line import/group-exports
export const sharpMatcherRegx = /#([^#]+)$/;