@shopify/polaris/build/cjs/utilities/listbox/utilities.js

Shopify’s admin product component library

'use strict';

function scrollOptionIntoView(option, scrollable) {
  const listTop = scrollable.scrollTop;
  const listBottom = listTop + scrollable.clientHeight;
  const {
    offsetHeight: optionHeight
  } = option;
  const {
    offsetTop: optionTop
  } = option;
  const optionBottom = optionTop + optionHeight;
  const isVisible = optionTop > listTop && optionBottom < listBottom;
  if (!isVisible) {
    let top = 0;
    if (optionBottom > listBottom) {
      top = optionBottom + optionHeight * 0.85 - listBottom;
    } else if (optionTop < listTop) {
      top = optionTop - optionHeight * 0.15 - listTop;
    }
    requestAnimationFrame(() => {
      scrollable.scrollBy({
        top,
        behavior: 'auto'
      });
    });
  }
}

exports.scrollOptionIntoView = scrollOptionIntoView;