@elastic/eui/test-env/components/call_out/use_layout_observer.js

Elastic UI Component Library

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useLayoutObserver = void 0;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _react = require("react");
var _resize_observer = require("../observer/resize_observer/resize_observer");
/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

var SUPER_NARROW_WIDTH = 400;
var WIDE_BREAKPOINTS = {
  s: 800,
  m: 1000
};

/**
 * Observes the rendered width and sets `data-layout` on the root
 * element so that CSS can respond to size changes.
 *
 * This is an alternative to native CSS container queries. Its purpose is to handle cases where
 * container queries would collapse if the element is placed inside a container without a defined size.
 */
var useLayoutObserver = exports.useLayoutObserver = function useLayoutObserver(size) {
  var elementRef = (0, _react.useRef)(null);
  (0, _react.useEffect)(function () {
    var element = elementRef.current;
    if (!element || !_resize_observer.hasResizeObserver) return;
    var wide = WIDE_BREAKPOINTS[size];
    var observer = new ResizeObserver(function (_ref) {
      var _ref2 = (0, _slicedToArray2.default)(_ref, 1),
        entry = _ref2[0];
      var width = entry.borderBoxSize[0].inlineSize;
      if (width <= SUPER_NARROW_WIDTH) {
        element.setAttribute('data-layout', 'superNarrow');
      } else if (width >= wide) {
        element.setAttribute('data-layout', 'wide');
      } else {
        element.removeAttribute('data-layout');
      }
    });
    observer.observe(element);
    return function () {
      return observer.disconnect();
    };
  }, [size]);
  return elementRef;
};