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4947-2a6ab008b1bf639ff843.js
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(self.webpackChunkzent_docs=self.webpackChunkzent_docs||[]).push([[4947],{84947:(n,a,s)=>{"use strict";s.r(a),s.d(a,{default:()=>w});var t=s(73450),e=s(73118),o=s(27378),p=s(57318),c=s(33938),l=s(86446),u=s(39215),i=s(14623),r=s(24246);function k(n,a){var s=Object.keys(n);if(Object.getOwnPropertySymbols){var t=Object.getOwnPropertySymbols(n);a&&(t=t.filter((function(a){return Object.getOwnPropertyDescriptor(n,a).enumerable}))),s.push.apply(s,t)}return s}function d(n){for(var a=1;a<arguments.length;a++){var s=null!=arguments[a]?arguments[a]:{};a%2?k(Object(s),!0).forEach((function(a){(0,t.Z)(n,a,s[a])})):Object.getOwnPropertyDescriptors?Object.defineProperties(n,Object.getOwnPropertyDescriptors(s)):k(Object(s)).forEach((function(a){Object.defineProperty(n,a,Object.getOwnPropertyDescriptor(s,a))}))}return n}var m=function(){function n(n){var s=o.useState(null),t=(0,e.Z)(s,2),p=t[0],u=t[1],i=o.useState(!0),k=(0,e.Z)(i,2),m=k[0],f=k[1],h=o.useCallback((()=>u("Waypoint 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opacity: 0.8;\n padding: 10px 0;\n pointer-events: none;\n text-align: center;\n width: 100%;\n}\n\n.waypoint-demo-reveal {\n position: relative;\n}\n\n.waypoint-demo-reveal__scrollable-parent {\n max-height: 400px;\n overflow: scroll;\n position: relative;\n}\n\n.waypoint-demo-reveal__spacer {\n color: #969799;\n font-size: 40px;\n line-height: 200px;\n text-align: center;\n}\n\n.waypoint-demo-reveal-text {\n\ttransition: opacity 500ms, transform 500ms;\n\ttext-align: center;\n\tpadding: 10px 0;\n}\n\n.waypoint-demo-reveal-enter {\n\topacity: 0;\n\ttransform: scale(0.1);\n}\n\n.waypoint-demo-reveal-enter-active {\n\topacity: 1;\n\ttransform: scale(1);\n}\n\n.waypoint-demo-reveal-exit {\n\topacity: 1;\n\ttransform: scale(0.9);\n}\n\n.waypoint-demo-reveal-exit-active {\n\topacity: 0;\n\ttransform: scale(0);\n}"}),o.createElement(v,{html:'<h2 class="anchor-heading"><a href="#waypoint">¶</a><a href="javascript:void(0)" id="waypoint" class="anchor-point"></a>Waypoint</h2>\n<p>当滚动到某个 DOM 元素时执行一个函数，支持任意可滚动的容器。</p>\n<p><strong>常见使用场景：</strong></p>\n<ul>\n<li>懒加载图片</li>\n<li>无限滚动</li>\n<li>固钉</li>\n</ul>\n<h3 class="anchor-heading"><a href="#dai-ma-yan-shi">¶</a><a href="javascript:void(0)" id="dai-ma-yan-shi" class="anchor-point"></a>代码演示</h3>'}),o.createElement(b,{title:"基础用法",id:"Demo01basic",src:'<span class="token keyword module">import</span> <span class="token imports"><span class="token punctuation">{</span> <span class="token maybe-class-name">Waypoint</span><span class="token punctuation">,</span> <span class="token maybe-class-name">Icon</span><span class="token punctuation">,</span> <span class="token maybe-class-name">Checkbox</span> <span class="token punctuation">}</span></span> <span class="token keyword module">from</span> <span class="token string">\'zent\'</span><span class="token punctuation">;</span>\n\n<span class="token keyword">function</span> <span class="token function"><span class="token maybe-class-name">Demo</span></span><span class="token punctuation">(</span><span class="token parameter">props</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>\n <span class="token keyword">const</span> <span class="token punctuation">[</span>msg<span class="token punctuation">,</span> setMsg<span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token maybe-class-name">React</span><span class="token punctuation">.</span><span class="token method function property-access">useState</span><span class="token punctuation">(</span><span class="token keyword null nil">null</span><span class="token punctuation">)</span><span class="token punctuation">;</span>\n <span class="token keyword">const</span> <span class="token punctuation">[</span>autoBorderWidth<span class="token punctuation">,</span> setAutoBorderWidth<span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token maybe-class-name">React</span><span class="token punctuation">.</span><span class="token method function property-access">useState</span><span class="token punctuation">(</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">;</span>\n <span class="token keyword">const</span> setEnterMsg <span class="token operator">=</span> <span class="token maybe-class-name">React</span><span class="token punctuation">.</span><span class="token method function property-access">useCallback</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token arrow operator">=></span> <span class="token function">setMsg</span><span class="token punctuation">(</span><span class="token string">\'Waypoint 进入屏幕\'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span>\n <span class="token keyword">const</span> setLeaveMsg <span class="token operator">=</span> <span class="token maybe-class-name">React</span><span class="token punctuation">.</span><span class="token method function property-access">useCallback</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token arrow operator">=></span> <span class="token function">setMsg</span><span class="token punctuation">(</span><span class="token string">\'Waypoint 离开屏幕\'</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span>\n <span class="token keyword">const</span> setAuto <span class="token operator">=</span> <span class="token maybe-class-name">React</span><span class="token punctuation">.</span><span class="token method function property-access">useCallback</span><span class="token punctuation">(</span><span class="token parameter">e</span> <span class="token arrow operator">=></span> <span class="token function">setAutoBorderWidth</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token property-access">target</span><span class="token punctuation">.</span><span class="token property-access">checked</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span>\n <span class="token keyword">const</span> autoProps <span class="token operator">=</span> <span class="token maybe-class-name">React</span><span class="token punctuation">.</span><span class="token method function property-access">useMemo</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token arrow operator">=></span> <span class="token punctuation">{</span>\n <span class="token keyword control-flow">return</span> autoBorderWidth <span class="token operator">?</span> <span class="token punctuation">{</span>\n topOffset<span class="token operator">:</span> <span class="token string">\'auto\'</span><span class="token punctuation">,</span>\n bottomOffset<span class="token operator">:</span> <span class="token string">\'auto\'</span>\n <span class="token punctuation">}</span> <span class="token operator">:</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span>\n <span class="token punctuation">}</span><span class="token punctuation">,</span> <span class="token punctuation">[</span>autoBorderWidth<span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span>\n\n <span class="token keyword control-flow">return</span> <span class="token punctuation">(</span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">className</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>waypoint-demo-basic<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">style</span><span class="token script language-javascript"><span class="token script-punctuation punctuation">=</span><span class="token punctuation">{</span><span class="token punctuation">{</span>marginBottom<span class="token operator">:</span> <span class="token number">16</span><span class="token punctuation">}</span><span class="token punctuation">}</span></span><span class="token punctuation">></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Checkbox</span></span> <span class="token attr-name">checked</span><span class="token script language-javascript"><span class="token script-punctuation punctuation">=</span><span class="token punctuation">{</span>autoBorderWidth<span class="token punctuation">}</span></span> <span class="token attr-name">onChange</span><span class="token script language-javascript"><span class="token script-punctuation punctuation">=</span><span class="token punctuation">{</span>setAuto<span class="token punctuation">}</span></span><span class="token punctuation">></span></span>\n 猜测 topOffset 和 bottomOffset\n <span class="token tag"><span class="token tag"><span class="token punctuation"></</span><span class="token class-name">Checkbox</span></span><span class="token punctuation">></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>\n <span class="token punctuation">{</span>msg <span class="token operator">?</span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">className</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>waypoint-demo-basic__message<span class="token punctuation">"</span></span><span class="token punctuation">></span></span><span class="token punctuation">{</span>msg<span class="token punctuation">}</span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span> <span class="token operator">:</span> <span class="token keyword null nil">null</span><span class="token punctuation">}</span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">className</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>waypoint-demo-basic__scrollable-parent<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Waypoint</span></span> <span class="token attr-name">onEnter</span><span class="token script language-javascript"><span class="token script-punctuation punctuation">=</span><span class="token punctuation">{</span>setEnterMsg<span class="token punctuation">}</span></span> <span class="token attr-name">onLeave</span><span class="token script language-javascript"><span class="token script-punctuation punctuation">=</span><span class="token punctuation">{</span>setLeaveMsg<span class="token punctuation">}</span></span> <span class="token spread"><span class="token punctuation">{</span><span class="token spread operator">...</span>autoProps<span class="token punctuation">}</span></span><span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Spacer</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>\n <span class="token punctuation">)</span><span class="token punctuation">;</span>\n<span class="token punctuation">}</span>\n\n<span class="token keyword">function</span> <span class="token function"><span class="token maybe-class-name">Spacer</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>\n <span class="token keyword control-flow">return</span> <span class="token punctuation">(</span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>div</span> <span class="token attr-name">className</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>waypoint-demo-basic__spacer<span class="token punctuation">"</span></span><span class="token punctuation">></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Icon</span></span> <span class="token attr-name">type</span><span class="token attr-value"><span class="token punctuation attr-equals">=</span><span class="token punctuation">"</span>down<span class="token punctuation">"</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>div</span><span class="token punctuation">></span></span>\n <span class="token punctuation">)</span><span class="token punctuation">;</span>\n<span class="token punctuation">}</span>\n\n<span class="token maybe-class-name">ReactDOM</span><span class="token punctuation">.</span><span class="token method function property-access">render</span><span class="token punctuation">(</span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Demo</span></span> <span class="token punctuation">/></span></span><span class="token punctuation">,</span> mountNode<span class="token punctuation">)</span><span class="token punctuation">;</span>'},o.createElement(m)),o.createElement(b,{title:"Reveal",id:"Demo02reveal",src:'<span class="token keyword module">import</span> <span class="token imports"><span class="token punctuation">{</span> <span class="token maybe-class-name">Waypoint</span><span class="token punctuation">,</span> <span class="token maybe-class-name">Icon</span> <span class="token punctuation">}</span></span> <span class="token keyword module">from</span> <span class="token string">\'zent\'</span><span class="token punctuation">;</span>\n<span class="token keyword module">import</span> <span class="token imports"><span class="token punctuation">{</span> <span class="token maybe-class-name">CSSTransition</span> <span class="token punctuation">}</span></span> <span class="token keyword module">from</span> <span class="token string">\'react-transition-group\'</span><span class="token punctuation">;</span>\n\n<span class="token keyword">function</span> <span class="token function"><span class="token maybe-class-name">Reveal</span></span><span class="token punctuation">(</span><span class="token parameter">props</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>\n <span class="token keyword">const</span> <span class="token punctuation">[</span>revealed<span class="token punctuation">,</span> setRevealed<span class="token punctuation">]</span> <span class="token operator">=</span> <span class="token maybe-class-name">React</span><span class="token punctuation">.</span><span class="token method function property-access">useState</span><span class="token punctuation">(</span><span class="token boolean">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span>\n <span class="token keyword">const</span> reveal <span class="token operator">=</span> <span class="token maybe-class-name">React</span><span class="token punctuation">.</span><span class="token method function property-access">useCallback</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token arrow operator">=></span> <span class="token function">setRevealed</span><span class="token punctuation">(</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span>\n <span class="token keyword">const</span> hide <span class="token operator">=</span> <span class="token maybe-class-name">React</span><span class="token punctuation">.</span><span class="token method function property-access">useCallback</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token arrow operator">=></span> <span class="token function">setRevealed</span><span class="token punctuation">(</span><span class="token boolean">false</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span>\n <span class="token keyword control-flow">return</span> <span class="token punctuation">(</span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span></span><span class="token punctuation">></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Waypoint</span></span> <span class="token attr-name">onEnter</span><span class="token script language-javascript"><span class="token script-punctuation punctuation">=</span><span class="token punctuation">{</span>reveal<span class="token punctuation">}</span></span> <span class="token attr-name">onLeave</span><span class="token script language-javascript"><span class="token script-punctuation punctuation">=</span><span class="token punctuation">{</span>hide<span class="token punctuation">}</span></span> <span class="token punctuation">/></span></span>\n <span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">CSSTransition</span></span>\n <span class="token attr-name">in</span><span class="token script language-javascript"><span class="token script-punctuation punctuation">=</span><span class="token punctuation">{</span>revealed<span class="token punctuation">}</span></span>\n <span class="token attr-name">timeout</span><span class="token script language-javascript"><span class="token script-punctuation punctuation">=</span><span class="token punctuation">{</span><span class="token number">500</span><span class="token punctuation">}</span></span>\n <span class="token attr-name">classNames</span><span 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void</code></td>\n<td>否</td>\n<td></td>\n<td></td>\n</tr>\n<tr>\n<td>topOffset</td>\n<td>距离容器顶部的距离</td>\n<td><code>number</code>\n \n|\n \n<code>\'auto\'</code>\n \n|\n \n<code>string</code></td>\n<td>否</td>\n<td><code>0</code></td>\n<td></td>\n</tr>\n<tr>\n<td>bottomOffset</td>\n<td>距离容器底部的距离</td>\n<td><code>number</code>\n \n|\n \n<code>\'auto\'</code>\n \n|\n \n<code>string</code></td>\n<td>否</td>\n<td><code>0</code></td>\n<td></td>\n</tr>\n<tr>\n<td>horizontal</td>\n<td>是否使用水平滚动模式</td>\n<td><code>boolean</code></td>\n<td>否</td>\n<td><code>false</code></td>\n<td><code>true</code></td>\n</tr>\n<tr>\n<td>scrollableAncestor</td>\n<td>指定滚动容器的 DOM 元素，一般当外层有多个滚动容器时才需要使用</td>\n<td><code>Element</code></td>\n<td>否</td>\n<td></td>\n<td></td>\n</tr>\n<tr>\n<td>fireOnRapidScroll</td>\n<td>当快速滚动时是否触发 \n<code>onEnter</code>\n 和 \n<code>onLeave</code></td>\n<td><code>boolean</code></td>\n<td>否</td>\n<td><code>true</code></td>\n<td></td>\n</tr>\n<tr>\n<td>children</td>\n<td>待追踪的元素，不传时可以认为是追踪屏幕内一条线</td>\n<td><code>ReactNode</code></td>\n<td>否</td>\n<td></td>\n<td></td>\n</tr>\n</tbody>\n</table>\n<h4 class="anchor-heading"><a href="#topoffset-he-bottomoffset">¶</a><a href="javascript:void(0)" id="topoffset-he-bottomoffset" class="anchor-point"></a><code>topOffset</code> 和 <code>bottomOffset</code></h4>\n<ul>\n<li>容器的<a href="https://developer.mozilla.org/en-US/docs/Web/API/CSS_Object_Model/Determining_the_dimensions_of_elements#what.27s_the_size_of_the_displayed_content.3f">可滚动区域</a> 是 <code>clientWidth</code>✖️<code>clientHeight</code>，但是 <code>getBoundingClientRect</code> 的返回值包含了 <code>border</code> 的宽度，如果容器设置了 <code>border</code> 就需要使用 <code>topOffset</code> 或者 <code>bottomOffset</code> 传入 <code>border</code> 宽度</li>\n<li><code>topOffset</code> 和 <code>bottomOffset</code> 可正可负，正负数效果和 <code>margin</code> 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The child you passed is neither a DOM element (e.g. <div>) nor does it use the innerRef prop.\n")}(n.props.children,n.refElement.current),n.scrollableAncestor=n.findScrollableAncestor(),n.scrollEventListenerUnsubscribe=(0,p.Oo)(n.scrollableAncestor,"scroll",n.handleScroll,{passive:!0}),n.resizeEventListenerUnsubscribe=(0,p.Oo)(window,"resize",n.handleScroll,{passive:!0}),n.handleScroll(null)})))},a.prototype.componentDidUpdate=function(){var n=this;i.Z&&this.scrollableAncestor&&(this.cancelOnNextTick||(this.cancelOnNextTick=(0,r.Z)((function(){n.cancelOnNextTick=null,n.handleScroll(null)}))))},a.prototype.componentWillUnmount=function(){var n,a,s;i.Z&&(null===(n=this.scrollEventListenerUnsubscribe)||void 0===n||n.call(this),null===(a=this.resizeEventListenerUnsubscribe)||void 0===a||a.call(this),null===(s=this.cancelOnNextTick)||void 0===s||s.cancel())},a.prototype.findScrollableAncestor=function(){var n=this.props,a=n.horizontal,s=n.scrollableAncestor;if(s)return s;for(var t=this.refElement.current;t.parentNode;){if((t=t.parentNode)===document.body)return window;var e=getComputedStyle(t),o=(a?e.getPropertyValue("overflow-x"):e.getPropertyValue("overflow-y"))||e.getPropertyValue("overflow");if("auto"===o||"scroll"===o)return t}return window},a.prototype.getBounds=function(){var n,a,s=this.props.horizontal,t=this.refElement.current.getBoundingClientRect(),e=t.left,o=t.top,p=t.right,c=t.bottom,l=s?e:o,u=s?p:c;if(this.scrollableAncestor===window)n=s?window.innerWidth:window.innerHeight,a=0;else{var i=this.scrollableAncestor.getBoundingClientRect();n=s?i.width:i.height,a=s?i.left:i.top}return{waypointTop:l,waypointBottom:u,viewportTop:a+this.getOffset("top",n),viewportBottom:a+n-this.getOffset("bottom",n)}},a.prototype.getOffset=function(n,a){var s,t,e=this.props.horizontal,o=n+"Offset",p="top"===n?"border"+(e?"Left":"Top")+"Width":"border"+(e?"Right":"Bottom")+"Width",c=this.props[o];if("auto"!==c)return function(n,a){var s=function(n){var a;if(a="number"==typeof n?n:parseFloat(n),!Number.isNaN(a)&&Number.isFinite(a))return a}(n);if("number"==typeof s)return s;if("string"==typeof n){var t=function(n){if("%"===n.slice(-1))return parseFloat(n.slice(0,-1))/100}(n);if("number"==typeof t)return t*a}}(c,a);if(this.scrollableAncestor===window){var l=getComputedStyle(document.documentElement),u=function(){return k(l.fontSize)};return null!==(s=d(l[p],u,u))&&void 0!==s?s:0}var i=getComputedStyle(this.scrollableAncestor);return u=function(){return k(i.fontSize)},null!==(t=d(i[p],u,(function(){return k(getComputedStyle(document.documentElement).fontSize)})))&&void 0!==t?t:0},a.prototype.render=function(){var n=this,a=this.props.children;if(!a)return(0,e.jsx)("span",{ref:this.refElement,style:{fontSize:0},className:"zent-waypoint-marker","data-zv":"9.12.16"},void 0);var s=o.Children.only(a);return l(s)||(0,c.isForwardRef)(s)?(0,o.cloneElement)(s,{ref:function(a){n.refElement.current=a;var t=s.ref;t&&("function"==typeof t?t(a):t.current=a)}}):(0,o.cloneElement)(s,{innerRef:this.refElement})},a.defaultProps={topOffset:0,bottomOffset:0,horizontal:!1,fireOnRapidScroll:!0},a}(o.PureComponent)}}]);