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<h1 class="content-title">
Mengenal Hilal: Kenapa Harus Mengamatinya Sebelum Lebaran? </h1>
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<p class="content-author"><a href="https://www.ruangguru.com/blog/author/riza-miftah-muharram" class="">Riza Miftah Muharram</a> </p>
<p class="content-info"><span>March 26, 2025 • </span> <span>3 minutes read</span></p>
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<p style="text-align: justify;"><img decoding="async" style="width: 3418px;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Fakta%20Seru%20-%20Mengenal%20Hilal-01.jpg" alt="Mengenal Hilal" width="820" /></p>
<blockquote>
<p style="text-align: center;"><em>Apa itu hilal? Artikel ini berisi penjelasan mengenai hilal dan kenapa hilal harus selalu diamati sebelum lebaran.</em></p>
</blockquote>
<p style="text-align: center;">—</p>
<p> </p>
<p style="text-align: justify;">Pada momen menjelang lebaran seperti sekarang ini, pemerintah bersama beberapa organisasi masyarakat pasti selalu mengamati hilal untuk menentukan kapan 1 Syawal. <em>Nah</em>, apa sih alasannya? Kenalan dulu dengan hilal yuk!</p>
<p style="text-align: justify;">Sebelum kita ke pembahasan utama, sudah tahu belum kenapa Bulan memiliki bentuk yang berbeda-beda setiap malamnya?</p>
<p style="text-align: justify;">Wah, kalau belum tahu atau mungkin kamu lupa, kamu perlu langganan <a href="https://ruangguru.onelink.me/blPk/eaff0eb9" rel=" noopener"><strong>ruangbelajar</strong></a> <i>nih</i>. Penjelasan fase-fase Bulan akan dijelaskan dengan video dan animasi yang menarik biar kamu bisa lebih mengerti.</p>
<p><strong>Baca Juga: <a href="/blog/8-fase-bulan" rel="noopener">Memahami 8 Fase Bulan dan Gerhana</a></strong></p>
<p style="text-align: justify;">Perubahan bentuk Bulan setiap malamnya dikenal sebagai fase Bulan. Hal itu terjadi karena Bulan yang bergerak mengelilingi Bumi sekali setiap 29,5 hari. Selama mengelilingi Bumi, posisinya akan berpindah-pindah di langit.</p>
<p style="text-align: justify;">Perubahan bentuk ini terjadi karena Bulan <em>nggak</em> memancarkan cahaya sendiri, melainkan cahaya Bulan itu sebenarnya berasal dari pantulan cahaya Matahari. Dengan begitu, Bulan jadi punya dua sisi: sisi siang dan sisi malam.</p>
<p style="text-align: justify;">Saat Bulan purnama, kita sedang melihat sisi siang hari Bulan secara keseluruhan. Saat fase Bulan separuh, kita sedang melihat secara langsung sisi siang dan sisi malam Bulan. Lain lagi saat fase Bulan baru, kita tidak bisa melihat Bulan karena yang kita amati adalah sisi malam harinya.</p>
<p style="text-align: justify;">Nah, sistem penanggalan Hijriah memanfaatkan pergerakan Bulan ini. Jadi, mengamati Bulan untuk menentukan penanggalan Hijriah adalah hal yang sebenarnya wajib. Ingat <em>lho</em> ya, mengamati Bulan, bukan mengamati jodoh.</p>
<p style="text-align: center;"><img decoding="async" style="width: 500px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Fakta%20Seru%20-%20Mengenal%20Hilal-05.jpg" alt="hilal" width="500" /></p>
<p> </p>
<h2><span style="font-size: 18pt;">Apa itu Hilal?</span></h2>
<p style="text-align: justify;">Hilal adalah istilah bahasa Arab untuk “Bulan sabit”. Dikutip dari <i>EarthSky.org</i>, <span style="font-weight: bold;">hilal adalah Bulan sabit yang bisa kita lihat pertama kali tepat setelah fase Bulan baru.</span> Dengan begitu, hilal adalah Bulan sabit yang sangaaat tipis karena masih sangat muda usianya, sekitar 12 jam setelah fase Bulan baru.</p>
<p style="text-align: justify;">Alasan utama kenapa kita wajib mengamati hilal adalah, karena <span style="font-weight: bold;">hilal merupakan penanda bahwa awal bulan baru dalam kalender Hijriah sudah dimulai.</span> Bila hilal belum terlihat, maka belum berganti bulan dalam penanggalan Hijriah.</p>
<p style="text-align: justify;"><img decoding="async" style="width: 500px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Fakta%20Seru%20-%20Mengenal%20Hilal-03.jpg" alt="cara melihat hilal" width="500" /></p>
<p> </p>
<h2><span style="font-size: 18pt;">Kriteria Hilal</span></h2>
<p style="text-align: justify;">Tapi, <i>nggak</i> sembarangan Bulan sabit tipis bisa disebut hilal, <em>lho</em>. Ada kriteria khususnya. Hilal adalah Bulan sabit tipis yang harus bisa diamati saat Matahari terbenam untuk menghitung ketinggiannya. Dengan begitu, terlihatnya Bulan sabit tipis di siang hari bukan berarti adalah hilal.</p>
<p style="text-align: justify;">Apa sebabnya? Itu karena Bulan sabit tipis di pagi atau siang hari bukan selalu fase Bulan sabit muda, namun bisa juga masih merupakan Bulan sabit tua (fase Bulan sebelum fase Bulan baru).</p>
<p style="text-align: justify;"><strong><span style="color: #000000;">Baca Juga:</span> <a href="/blog/cara-kerja-teropong-bintang" rel="noopener">Cara Kerja Teropong Bintang dan Rumus Perhitungannya</a></strong></p>
<p> </p>
<h2><span style="font-size: 18pt;">Alat untuk Mengamati Hilal</span></h2>
<p style="text-align: justify;"><i>Oh iya</i>, mencari hilal juga bukanlah hal yang mudah. Karena sangat tipis, diperlukan kejelian level tinggi unuk bisa menemukannya. Untungnya, sekarang sudah tersedia peralatan pengamatan astronomi seperti teleskop untuk pengamatan hilal yang lebih mudah dilakukan.</p>
<p style="text-align: center;"><img decoding="async" style="width: 500px; margin-left: auto; margin-right: auto; display: block;" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Fakta%20Seru%20-%20Mengenal%20Hilal-04.jpg" alt="alat untuk melihat hilal" width="500" /></p>
<p> </p>
<h2><span style="font-size: 18pt;">Waktu untuk Melihat Hilal</span></h2>
<p style="text-align: justify;">Selain itu, rentang waktu untuk melihat hilal juga sebentar <i>banget</i>. Usia hilal yang biasa diamati para astronom masih kurang dari 12 jam dan ketinggiannya masih di bawah 6 derajat dari cakrawala. Dengan ketinggian seperti itu, hilal akan terbenam kurang lebih sekitar 24 menit setelah Matahari terbenam. Sebentar <i>banget</i>, <i>‘kan?</i></p>
<p style="text-align: justify;">Setelah hilal teramati, itu artinya malamnya sudah masuk awal dari bulan baru. Kalau itu hilal awal Syawal, maka seluruh kegiatan ibadah yang selama ini kita lakukan selama Ramadan akan berakhir saat malam itu pula. Seperti misalnya salat tarawih maupun sahur di keesokan hari, sudah <i>nggak</i> perlu dilakukan lagi.</p>
<p style="text-align: center;">—</p>
<p style="text-align: justify;"><i>Nah</i>, itulah hilal yang biasa diamati penentu awal bulan hijriah. Mohon maaf lahir dan batin ya. Selamat menyambut lebaran!</p>
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<li><a href="https://www.ruangguru.com/press">Press Kit</a></li>
<li><a href="https://www.ruangguru.com/bantuan">Bantuan</a></li>
<li><a href="https://career.ruangguru.com/">Karier</a></li>
</ul>
</nav>
</div>
<div class="col-6 col-md-3">
<nav class="footer-menu">
<p class="title">Produk Lainnya</p>
<ul type="none">
<li><a href="https://www.brainacademy.id/" target="_blank">Brain Academy</a></li>
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<li><a href="https://skillacademy.com/" target="_blank">Skill Academy</a></li>
<li><a href="https://www.ruangkerja.id/" target="_blank">Ruangkerja</a></li>
<li><a href="https://www.schoters.com/id/" target="_blank">Schoters</a></li>
<li><a href="https://www.kalananti.id/" target="_blank">Kalananti</a></li>
</ul>
</nav>
</div>
<div class="col-6 col-md-3">
<nav class="footer-menu">
<p class="title"> Coba GRATIS Aplikasi Ruangguru</p>
<div class="download-list">
<ul>
<li>
<a target="_blank" rel="nofollow" href="https://apps.apple.com/id/app/ruangguru-solusi-belajar/id1099742206?l=id">
<img src="https://cdn-web-2.ruangguru.com/static/appstore.png" loading="lazy" alt="Button App Store Footer " />
</a>
</li>
<li>
<a target="_blank" rel="nofollow" href="https://play.google.com/store/apps/details?id=com.ruangguru.livestudents&hl=in">
<img src="https://cdn-web-2.ruangguru.com/static/googleplay.png" loading="lazy" alt="Button Google Play Footer " />
</a>
</li>
<li>
<a target="_blank" rel="nofollow" href="https://appgallery.huawei.com/#/app/C102352375">
<img src="https://cdn-web-2.ruangguru.com/static/huawei.png" loading="lazy" alt="Button AppGallery Footer " />
</a>
</li>
</ul>
</div>
</nav>
</div>
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</div>
</div>
<div class="d-lg-none text-center">
<nav class="footer-menu social">
<p class="title">Ikuti Kami</p>
<a target="_blank" href="https://www.instagram.com/ruangguru/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/instagram.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/instagram.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/instagram.png" loading="lazy" alt="Logo Instagram Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.facebook.com/ruanggurucom/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/facebook.png?height=60&convert=webp" type="image/webp">
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<img src="https://cdn-web-2.ruangguru.com/static/facebook.png" loading="lazy" alt="Logo Facebook Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://twitter.com/ruangguru/">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/twitter.png?height=60&convert=webp" type="image/webp">
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</picture>
</a>
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<picture>
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</picture>
</a>
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<picture>
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</picture>
</a>
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</picture>
</a>
</nav>
</div>
<p class="footer-copyright">
© 2026 All Rights Reserved PT. Ruang Raya Indonesia
</p>
</div>
<style>
.bantuan-container {
position: relative;
}
.bantuan-element {
position: fixed;
z-index: 999;
display: flex;
align-items: flex-end;
justify-content: flex-end;
cursor: pointer;
transition: all 0.6s ease;
}
.bantuan-top {
bottom: 11rem;
right: 2rem;
}
.bantuan-bottom {
bottom: 2rem;
right: 2rem;
}
.bantuan-top-2 {
bottom: 15rem;
right: 2rem;
}
.bantuan-top-3 {
bottom: 19rem;
right: 2rem;
}
.bantuan-bottom-2 {
bottom: 5rem;
right: 2rem;
}
.bantuan-bottom-3 {
bottom: 8rem;
right: 2rem;
}
@media (min-width: 768px) {
.bantuan-element img {
width: auto;
transition: all 0.4s ease;
}
.bantuan-top img {
width: 140px;
}
.bantuan-bottom img {
width: 140px;
}
.bantuan-top-2 img,
.bantuan-top-3 img {
width: 140px;
}
.bantuan-bottom-2 img,
.bantuan-bottom-3 img {
width: 140px;
}
.bantuan-element.clicked {
bottom: 9rem;
right: 2.5rem;
}
.bantuan-element.clicked img {
width: auto;
height: 64px;
}
}
@media (max-width: 767px) {
.bantuan-top {
bottom: 8rem;
right: 1rem;
align-items: center;
}
.bantuan-bottom {
bottom: 2rem;
right: 1.25rem;
align-items: center;
}
.bantuan-top-2 {
bottom: 12rem;
right: 1rem;
align-items: center;
}
.bantuan-top-3 {
bottom: 16rem;
right: 1rem;
align-items: center;
}
.bantuan-bottom-2 {
bottom: 5rem;
right: 1.25rem;
align-items: center;
}
.bantuan-bottom-3 {
bottom: 8rem;
right: 1.25rem;
align-items: center;
}
.bantuan-element img {
width: auto;
}
.bantuan-top img,
.bantuan-top-2 img,
.bantuan-top-3 img {
width: 96px;
}
.bantuan-bottom img,
.bantuan-bottom-2 img,
.bantuan-bottom-3 img {
width: 96px;
}
}
.bantuan-element:hover {
transform: scale(1.05);
}
.bantuan-element img {
max-width: 100%;
height: auto;
}
</style>
<div id="bantuan-divs-container" style="position: relative" data-product="ruangguru" data-table="rg_floating_icon"></div>
<script>
class FloatingDivsComponent {
constructor(product = 'ruangguru', table = 'rg_floating_icon') {
this.container = document.getElementById('bantuan-divs-container');
this.floatingElements = [];
this.product = product;
this.table = table;
// Configuration
this.config = {
baseApiUrl: 'https://gw.ruangguru.com/api/v3/rdb/p_ddgy8hjx5dxsqx/rg_banner/views/',
apiKey: 'vLyK3dJrDBRmOwueX2OJXibMkgsUbBk0WS4ua2p1',
maxElements: 2,
zIndexBase: 100,
};
// Build dynamic API URL based on table parameter
this.config.apiUrl = this.buildApiUrl();
this.init();
}
buildApiUrl() {
const baseUrl = this.config.baseApiUrl;
const tableName = this.table || 'rg_floating_icon';
const queryParams =
'offset=0&limit=99999&sort=rankPosition&where=(type,eq,floating)~and(showIn,anyof,blog)~and(hide,is,false)~and(product,eq,' +
this.product +
')&nested%5Bcta%5D%5Bfields%5D=Id,name,ctaId,imageUrl,ctaLink,targetUrl';
return `${baseUrl}${tableName}?${queryParams}`;
}
async init() {
try {
await this.fetchFloatingElements();
this.renderFloatingElements();
} catch (error) {
console.error('Failed to initialize floating divs component:', error);
}
}
async fetchFloatingElements() {
try {
const options = {
method: 'GET',
headers: {
'xc-token': this.config.apiKey || 'vLyK3dJrDBRmOwueX2OJXibMkgsUbBk0WS4ua2p1',
},
};
const urlNoco = this.config.apiUrl;
const response = await fetch(urlNoco, options);
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
const data = await response.json();
this.floatingElements = this.processApiResponse(data);
} catch (error) {
console.error('Error fetching floating elements:', error);
throw error;
}
}
processApiResponse(data) {
if (!data || !data.list || !Array.isArray(data.list)) {
return [];
}
console.log(data.list);
// Ensure we only get maximum 2 elements
const limitedElements = data.list.slice(0, this.config.maxElements);
return limitedElements;
}
renderFloatingElements() {
if (!this.container || this.floatingElements.length === 0) {
return;
}
// Additional safeguard: ensure we never render more than maxElements
const elementsToRender = this.floatingElements.slice(0, this.config.maxElements);
// Clean up existing elements and their event listeners
this.cleanupExistingElements();
// Clear existing content
this.container.innerHTML = '';
elementsToRender.forEach((element, index) => {
const floatingDiv = this.createFloatingDiv(element, index);
this.container.appendChild(floatingDiv);
});
}
cleanupExistingElements() {
// Clear existing elements (no need for event listener cleanup with CSS approach)
const existingElements = this.container.querySelectorAll('[data-floating-element]');
existingElements.forEach(element => {
element.remove();
});
}
createFloatingDiv(element, index) {
const div = document.createElement('div');
const cta = element.cta[0]; // Use the first CTA
// Add data attribute for cleanup tracking
div.setAttribute('data-floating-element', 'true');
// Apply CSS classes based on rankPosition
const positionClass = this.getPositionClass(element.rankPosition, index);
div.className = `bantuan-element ${positionClass}`;
div.style.zIndex = this.config.zIndexBase + index;
// Create the link and image
const link = document.createElement('a');
link.href = 'https://cta.ruangguru.com/' + cta.ctaId || '#';
link.target = '_blank';
// Add tracking attributes
link.setAttribute('data-tracking-event-type', 'landing_page__core__item_click');
link.setAttribute(
'data-tracking-context',
JSON.stringify({
product_name: this.product,
cta_action: 'redirection',
cta_action_detail: link.href,
item_type: 'floating',
item_name: element.name || 'Floating element',
item_category: 'payment',
item_position: index,
item_serial: null,
section_type: 'floating_item',
section_position: 'body',
section_name: 'floating_item',
})
);
const img = document.createElement('img');
img.src = element.imageUrl + '?h=200&convert=webp';
img.alt = element.name || 'Floating element';
img.loading = 'lazy';
// Add click tracking
link.addEventListener('click', () => {
this.trackClick(element, cta);
});
link.appendChild(img);
div.appendChild(link);
return div;
}
getPositionClass(rankPosition, index) {
// Define positioning classes based on rankPosition
if (rankPosition === 1) {
return 'bantuan-top'; // Top position
} else if (rankPosition === 2) {
return 'bantuan-bottom'; // Bottom position
} else {
// For additional elements, distribute them evenly
return `bantuan-${index % 2 === 0 ? 'top' : 'bottom'}-${Math.floor(index / 2) + 1}`;
}
}
trackClick(element, cta) {
// Implement click tracking logic here
console.log('Floating element clicked:', {
elementId: element.Id,
elementName: cta.name,
ctaId: cta.ctaId,
targetUrl: cta.targetUrl,
});
}
// Public method to manually refresh
async refresh() {
try {
await this.fetchFloatingElements();
this.renderFloatingElements();
} catch (error) {
console.error('Failed to refresh floating elements:', error);
throw error;
}
}
// Public method to get current floating elements
getFloatingElements() {
return [...this.floatingElements];
}
}
// Initialize the component when DOM is ready
document.addEventListener('DOMContentLoaded', () => {
// Get product and table parameters from data attributes
const container = document.getElementById('bantuan-divs-container');
const product = container.getAttribute('data-product') || 'ruangguru';
const table = container.getAttribute('data-table') || 'rg_floating_icon';
new FloatingDivsComponent(product, table);
});
// Export for use in other modules if needed
if (typeof module !== 'undefined' && module.exports) {
module.exports = FloatingDivsComponent;
}
</script> <div id="wp-install-nudge" style="
position: fixed;
bottom: 0rem;
right: 0;
z-index: 999;
cursor: pointer;
"></div>
<script>
(function (w, d, s, o, f, js, fjs) {
w['Sales-Nudge-Widget'] = o; w[o] = w[o] || function () { (w[o].q = w[o].q || []).push(arguments) };
js = d.createElement(s), fjs = d.getElementsByTagName(s)[0];
js.id = o; js.src = f; js.async = 1; fjs.parentNode.insertBefore(js, fjs);
}(window, document, 'script', 'wpInstallNudge', 'https://cdn-web-2.ruangguru.com/sales-nudge/6198a95130/dist/widget.js'));
wpInstallNudge('init', { targetElementId: 'wp-install-nudge', clientTarget: 'ruangguru_blog' });
</script>
<script>
// note: disabled due to auto reload page
// var lastScrollTop = 0;
// $(window).scroll(function(event){
// var st = $(this).scrollTop();
// if (st > lastScrollTop){
// $('#wp-install-nudge').slideDown( "slow", function() {});
// } else {
// $('#wp-install-nudge').slideUp( "slow", function() {});
// }
// lastScrollTop = st;
// });
// $(document).ready(function () {
// $("#wp-install-nudge").hide();
// });
$('#wp-install-nudge').click(function(){
Analytics.track("promotion__install_nudge__click",
{
user_email: "ruangguru@blog.com",
cta_link: widgetData.dataConfig.target_link
}).catch((err) => {
console.log("tracker error", err);
});
});
</script>
</footer>
<div id="__next"></div>
<script type="speculationrules">
{"prefetch":[{"source":"document","where":{"and":[{"href_matches":"\/blog\/*"},{"not":{"href_matches":["\/blog\/wp-*.php","\/blog\/wp-admin\/*","\/blog\/wp-content\/uploads\/*","\/blog\/wp-content\/*","\/blog\/wp-content\/plugins\/*","\/blog\/wp-content\/themes\/ruangguru\/*","\/blog\/*\\?(.+)"]}},{"not":{"selector_matches":"a[rel~=\"nofollow\"]"}},{"not":{"selector_matches":".no-prefetch, .no-prefetch a"}}]},"eagerness":"conservative"}]}
</script>
<script>
async function getCtaDetails(ctaIds) {
const endpoint =
" https://gw.ruangguru.com/api/v3/rdb/p_ddgy8hjx5dxsqx/CTA/views/CTA?offset=0&limit=10&where=(ctaId,in," + ctaIds.toString() + ")";
try {
const response = await fetch(endpoint, {
headers: {
"xc-token": "-hG2nBDJzSj0agSgNtcJx97M4F02y54nUMoY6plJ",
},
});
const data = await response.json();
const ctaList = data?.list || [];
const ctaMap = new Map();
for (const ctaData of ctaList) {
ctaMap.set(ctaData.ctaId, ctaData);
}
return ctaMap;
} catch (error) {
console.error("Error fetching CTA details:", error);
return new Map();
}
}
async function replaceCTA() {
const regex = /{{cta\((‘(.*?)’|“(.*?)”)\)}}/g;
const bodyHTML = document.body.innerHTML;
const matches = Array.from(bodyHTML.matchAll(regex));
const ctaIds = matches.map((match) => {
let ctaId = match[2] ?? match[3];
return ctaId;
});
const ctaMap = await getCtaDetails(ctaIds);
const replacedHTML = bodyHTML.replace(regex, (match, _inner, ctaId1, ctaId2) => {
const ctaId = ctaId1 ?? ctaId2;
const ctaData = ctaMap.get(ctaId);
if (ctaData) {
return `<a href="https://cta.ruangguru.com/${ctaData.ctaId}" target="_${ctaData.targetType}" style="position:relative;display:inline-block;">
<img src="${ctaData.imageUrl}" loading="lazy" alt="${ctaData.altText}" />
</a>`;
} else {
return match;
}
});
document.body.innerHTML = replacedHTML;
}
</script>
<meta name="author" content="Ruangguru Tech Team">
<!-- Google Tag Manager (noscript) -->
<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-PVNLZFT" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<!-- Tracker -->
<script type="text/javascript" src="https://cdn-web-2.ruangguru.com/landing-page-web/public/staticpages/global-assets/js/cta.js"></script>
<script src="https://unpkg.com/@dotlottie/player-component@latest/dist/dotlottie-player.mjs" type="module"></script>
</body>
</html>