export async function scrollBehavior()

in src/utils/router-utils.js [40:68]

• 20 lines of code
• 7 McCabe index (conditional complexity)

export async function scrollBehavior(to, from, savedPosition) {
  if (savedPosition) {
    // Wait until the page has been rendered, then scroll to the saved
    // position. If we resolve too early, `savedPosition.y` could be
    // outside the bounds of the app's non-rendered page, which is
    // header + loading-placeholder + footer. This would result in the
    // browser displaying the top of the page and no scrolling to occur.
    await this.app.$nextTick();
    return savedPosition;
  }
  if (to.hash) {
    const { name, query, hash } = to;
    const isDocumentation = name.includes(documentationTopicName);
    const hasNavBarOpen = !!query.changes;
    const baseNavOffset = getBaseNavOffset();
    // if on docs and have API changes enabled
    const apiChangesNavHeight = (isDocumentation && hasNavBarOpen) ? baseNavOffset : 0;
    // compensate for the nav sticky height.
    const offset = baseNavOffset + apiChangesNavHeight;

    const y = process.env.VUE_APP_TARGET === 'ide' ? 0 : offset;
    return { selector: cssEscapeTopicIdHash(hash), offset: { x: 0, y } };
  }
  if (areEquivalentLocations(to, from)) {
    // Do not change the scroll position if the location hasn't changed.
    return false;
  }
  return { x: 0, y: 0 };
}