@workday/canvas-kit-react/dist/es6/collection/lib/useOverflowListTarget.js

The parent module that contains all Workday Canvas Kit React components

import React from 'react';
import { createElemPropsHook, useMountLayout, useLocalRef } from '@workday/canvas-kit-react/common';
import { useOverflowListModel } from './useOverflowListModel';
// use a hidden style instead of `hidden` attribute for measurement purposes. `hidden` elements have no dimensions
const hiddenStyle = {
    position: 'absolute',
    left: -99999,
};
/**
 * This elemProps hook measures an overflow list target and reports it to an `OverflowListModel`.
 * This is used in overflow detection.
 */
export const useOverflowListTarget = createElemPropsHook(useOverflowListModel)((model, ref) => {
    const { elementRef, localRef } = useLocalRef(ref);
    // track first render to force correct size calculations
    const firstRender = React.useRef(true);
    useMountLayout(() => {
        firstRender.current = false;
        if (localRef.current) {
            const styles = getComputedStyle(localRef.current);
            model.events.setOverflowTargetSize({
                width: localRef.current.offsetWidth +
                    parseFloat(styles.marginLeft) +
                    parseFloat(styles.marginRight),
                height: localRef.current.offsetHeight +
                    parseFloat(styles.marginTop) +
                    parseFloat(styles.marginBottom),
            });
        }
    });
    const isHidden = !model.state.hiddenIds.length;
    return {
        ref: elementRef,
        'aria-hidden': isHidden,
        tabIndex: isHidden ? -1 : 0,
        style: isHidden ? hiddenStyle : undefined,
    };
});