beta-parity-react/ui/hooks/useObserver.js

Beta Parity React Components

"use strict";Object.defineProperty(exports,"__esModule",{value:true});exports.useElementSize=useElementSize;exports.useResizeObserver=useResizeObserver;var _react=require("react");function _slicedToArray(arr,i){return _arrayWithHoles(arr)||_iterableToArrayLimit(arr,i)||_unsupportedIterableToArray(arr,i)||_nonIterableRest()}function _nonIterableRest(){throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.")}function _unsupportedIterableToArray(o,minLen){if(!o)return;if(typeof o==="string")return _arrayLikeToArray(o,minLen);var n=Object.prototype.toString.call(o).slice(8,-1);if(n==="Object"&&o.constructor)n=o.constructor.name;if(n==="Map"||n==="Set")return Array.from(o);if(n==="Arguments"||/^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n))return _arrayLikeToArray(o,minLen)}function _arrayLikeToArray(arr,len){if(len==null||len>arr.length)len=arr.length;for(var i=0,arr2=new Array(len);i<len;i++)arr2[i]=arr[i];return arr2}function _iterableToArrayLimit(r,l){var t=null==r?null:"undefined"!=typeof Symbol&&r[Symbol.iterator]||r["@@iterator"];if(null!=t){var e,n,i,u,a=[],f=!0,o=!1;try{if(i=(t=t.call(r)).next,0===l){if(Object(t)!==t)return;f=!1}else for(;!(f=(e=i.call(t)).done)&&(a.push(e.value),a.length!==l);f=!0);}catch(r){o=!0,n=r}finally{try{if(!f&&null!=t["return"]&&(u=t["return"](),Object(u)!==u))return}finally{if(o)throw n}}return a}}function _arrayWithHoles(arr){if(Array.isArray(arr))return arr}var defaultState={x:0,y:0,width:0,height:0,top:0,left:0,bottom:0,right:0};function useResizeObserver(options){var frameID=(0,_react.useRef)(0);var ref=(0,_react.useRef)(null);var _useState=(0,_react.useState)(defaultState),_useState2=_slicedToArray(_useState,2),rect=_useState2[0],setRect=_useState2[1];var observer=(0,_react.useMemo)(function(){return typeof window!=="undefined"?new ResizeObserver(function(entries){var entry=entries[0];if(entry){cancelAnimationFrame(frameID.current);frameID.current=requestAnimationFrame(function(){if(ref.current){setRect(entry.contentRect)}})}}):null},[]);(0,_react.useEffect)(function(){if(ref.current){observer===null||observer===void 0||observer.observe(ref.current,options)}return function(){observer===null||observer===void 0||observer.disconnect();if(frameID.current){cancelAnimationFrame(frameID.current)}}},[ref.current]);return[ref,rect]}function useElementSize(options){var _useResizeObserver=useResizeObserver(options),_useResizeObserver2=_slicedToArray(_useResizeObserver,2),ref=_useResizeObserver2[0],_useResizeObserver2$=_useResizeObserver2[1],width=_useResizeObserver2$.width,height=_useResizeObserver2$.height;return{ref:ref,width:width,height:height}}