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<h1 class="content-title">
Menghitung Daya Radiasi Benda Menggunakan Hukum Stefan-Boltzmann | Fisika Kelas 12 </h1>
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<p class="content-author"><a href="https://www.ruangguru.com/blog/author/karina-dwi-adistiana" class="">Karina Dwi Adistiana</a> </p>
<p class="content-info"><span>August 2, 2022 • </span> <span>3 minutes read</span></p>
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<p><span style="color: #000000;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/Header%20blog%20RG/Fisika_12.jpg" alt="Menghitung Daya Radiasi Benda Menggunakan Hukum Stefan-Boltzmann" style="display: block; margin-left: auto; margin-right: auto; width: 820px;" width="820"></span></p>
<blockquote>
<p style="text-align: center;"><span style="color: #000000; font-style: italic;">Sebelumnya kamu sudah mengetahui kan, apa itu <strong><a href="https://blog.ruangguru.com/mengenal-radiasi-benda-hitam" style="color: #000000;">radiasi benda hitam</a></strong>? Benda hitam maupun benda lainnya yang memancarkan radiasi memiliki laju rata-rata energi atau biasa disebut daya radiasi. Daya radiasi dapat dihitung menggunakan rumus dari hukum Stefan-Boltzmann. Bagaimana cara menghitungnya? Simak penjelasan berikut kuy!</span></p>
<p style="text-align: center;"><span style="color: #000000; font-style: italic;">—</span></p>
</blockquote>
<p><span style="color: #000000;"><span id="more-2320"></span></span></p>
<p style="text-align: justify;"><span style="color: #000000;">Tahun 1879 seorang fisikawan asal Austria yang bernama <strong>Josef Stefan</strong> melakukan eksperimen bahwa daya total persatuan luas yang dipancarkan oleh semua benda hitam panas pada semua frekuensi adalah sebanding dengan pangkat empat suhu mutlaknya. Selang beberapa tahun kemudian, berdasarkan teori gelombang elektromagnetik cahaya, <strong>Ludwig Boltzmann</strong> menurunkan hukum yang diungkapkan oleh Stefan dari gabungan termodinamika dan persamaan-persamaan Maxwell. Sehingga persamaan tersebut dikenal sebagai Hukum Stefan-Boltzmann.</span></p>
<p><span style="color: #000000;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/stefan%20dan%20boltzmann.jpg" alt="stefan dan boltzmann" style="width: 640px; display: block; margin-left: auto; margin-right: auto;" title="stefan dan boltzmann" caption="false" data-constrained="true" width="640"></span></p>
<p style="text-align: center;"><span style="color: #000000;">Stefan dan Boltzmann (<em>Sumber: quora.com</em>)</span></p>
<p style="text-align: center;"><span style="color: #000000;"> </span></p>
<p style="text-align: justify;"><span style="color: #000000;">Hukum Stefan-Boltzmann ini menyatakan bahwa <strong>jumlah energi yang dipancarkan per waktu dari satuan luas permukaan benda hitam ideal akan sebanding dengan kekuatan keempat suhu absolut benda hitam tersebut.</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000;"><strong>Baca Juga: <a href="/blog/pergeseran-wien-pada-radiasi-benda-hitam" rel="noopener" target="_blank">Pergeseran Wien pada Radiasi Benda Hitam</a></strong></span></p>
<p><span style="color: #000000;"><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/hukum%20stefan.png" alt="hukum stefan-boltzmann" style="width: 600px; display: block; margin-left: auto; margin-right: auto;" title="hukum stefan-boltzmann" caption="false" data-constrained="true" width="600"></span></p>
<p style="text-align: justify;"><span style="color: #000000;">Selanjutnya dari bunyi Hukum Stefan-Boltzmann di atas dapat dirumuskan sebagai berikut:</span></p>
<div><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/rumus%20hukum%20stefan-boltzmann.png" alt="rumus hukum stefan-boltzmann" width="600" style="width: 600px; display: block; margin: 0px auto;"></div>
<p style="text-align: justify;"><span style="color: #000000;">Rumus tersebut digunakan untuk menghitung daya radiasi atau laju energi rata-rata pada benda hitam, jika benda panas yang bukan benda hitam maka akan memenuhi hukum yang sama tetapi nilai emisivitasnya lebih kecil dari satu. Benda hitam ideal akan menerima semua radiasi tanpa memantulkannya, dapat memanaskan dirinya sendiri dan melepaskan semua energi dengan bergantung pada suhunya.</span></p>
<p style="text-align: justify;"><span style="color: #000000;">Untuk lebih jelasnya kita coba kerjakan <strong>contoh soal</strong> berikut <em>yuk</em>, Squad</span></p>
<h2 style="text-align: justify; font-size: 20px;"> </h2>
<h2 style="text-align: justify; font-size: 20px;">Contoh Soal:</h2>
<p style="text-align: justify;"><span style="color: #000000;">1. Sebuah benda dengan luas permukaan 200 cm<sup>2</sup> bersuhu 727ºC. Emisivitas benda sebesar 0,6. Tentukan daya radiasi pada benda tersebut!</span></p>
<p style="text-align: justify;"><span style="color: #000000;"><strong>Diketahui:</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000;">σ = 5,67 x 10<sup>-8</sup> (W/m<sup>2</sup>K<sup>4</sup>)</span></p>
<p style="text-align: justify;"><span style="color: #000000;">A = 200 cm<sup>2</sup> = 200 x 10<sup>-4</sup> = 2 x 10<sup>-2 </sup>m<sup>2</sup></span></p>
<p style="text-align: justify;"><span style="color: #000000;">e = 0,6</span></p>
<p style="text-align: justify;"><span style="color: #000000;">T = 727ºC + 273 K = 1000 K</span></p>
<p style="text-align: justify;"><span style="color: #000000;"><strong>Ditanya:</strong> P?</span></p>
<p style="text-align: justify;"><span style="color: #000000;"><strong>Jawab:</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000;">P = e A T<sup>4</sup></span></p>
<p style="text-align: justify;"><span style="color: #000000;">P = 0,6 x 5,67 x 10<sup>-8</sup> x 2 x 10<sup>-2 </sup> x 1000<sup>4</sup></span></p>
<p style="text-align: justify;"><span style="color: #000000;">P = 6,804 x 10<sup>2</sup> = 680,4 W</span></p>
<p style="text-align: justify;"><span style="color: #000000;">Jadi, besarnya daya radiasi atau laju energi rata-rata pada benda tersebut sebesar 680,4 Watt.</span></p>
<p style="text-align: justify; font-weight: bold;"><span style="color: #000000;"> Baca Juga: <a href="/blog/postulat-einstein-dalam-teori-relativitas-khusus" rel="noopener" target="_blank">Postulat Relativitas Khusus Einstein</a></span></p>
<p style="text-align: justify;"><span style="color: #000000;">2. Daya radiasi yang dipancarkan suatu benda pada suhu 227ºC adalah 1000 J/s. jika suhu benda naik menjadi 727ºC. Tentukan daya radiasi benda yang dipancarkan sekarang!</span></p>
<p style="text-align: justify;"><span style="color: #000000;"><strong>Diketahui:</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000;">T<sub>1</sub> = 227ºC = 500 K</span></p>
<p style="text-align: justify;"><span style="color: #000000;">T<sub>2</sub> = 727ºC = 1000 K</span></p>
<p style="text-align: justify;"><span style="color: #000000;">P<sub>1</sub> = 1000 J/s = 1000 W</span></p>
<p style="text-align: justify;"><span style="color: #000000;"><strong>Ditanya:</strong> P<sub>2</sub>?</span></p>
<p style="text-align: justify;"><span style="color: #000000;"><strong>Jawab:</strong></span></p>
<p style="text-align: justify;"><span style="color: #000000;"> <img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/rumus%20sb.png" alt="perhitungan stefan-boltzmann" style="width: 320px;" title="perhitungan stefan-boltzmann" caption="false" data-constrained="true" width="320"></span></p>
<p style="text-align: justify;"><span style="color: #000000;">Jadi, besar daya radiasi benda yang dipancarkan sekarang yaitu 16000 Watt.</span></p>
<p style="text-align: justify;"><span style="color: #000000;"> </span></p>
<p style="text-align: justify;"><span style="color: #000000;">Oke <span style="font-style: italic;">guys</span>, sekarang kamu sudah tahu <em>kan,</em> bagaimana menghitung daya radiasi benda dengan menggunakan Hukum Stefan-Boltzmann? Mudah bukan? Jangan lupa terus berlatih dengan berbagai soal yang lain ya. Kalau kamu masih pengen belajar lebih dalam lagi tentang materi ini, kamu bisa langsung langganan <a href="/ruangbelajar" rel="noopener" style="font-style: italic; font-weight: bold;">ruangbelajar</a> sekarang juga, lho! Banyak materi-materi yang dikemas dengan video pembelajaran menarik yang bikin kamu cepet paham.</span></p>
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<li><a href="https://www.ruangguru.com/blog">Ruangbaca</a></li>
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<li><a href="https://www.ruangguru.com/ruangbelajar">Ruangbelajar</a></li>
<li><a href="https://pengajar.ruangguru.com/">Ruangpengajar</a></li>
<li><a href="https://www.ruangguru.com/privat">Ruangguru Privat</a></li>
<li><a href="https://www.ruangpeduli.org/" target="_blank">Ruangpeduli</a></li>
</ul>
</nav>
</div>
<div class="col-6 col-md-3">
<nav class="footer-menu">
<p class="title">Bantuan & Panduan</p>
<ul type="none">
<li><a href="https://www.ruangguru.com/company-credentials">Company Credentials</a></li>
<li><a href="https://www.ruangguru.com/beasiswa">Beasiswa Ruangguru</a></li>
<li><a href="https://www.ruangguru.com/cicilan">Cicilan Ruangguru</a></li>
<li><a href="https://www.ruangguru.com/promo">Promo Ruangguru</a></li>
<li><a href="https://ticketing.ruangguru.com/help?request_type_id=459" target="_blank">Vulnerability Report</a></li>
<li><a href="https://www.ruangguru.com/bantuan#layanan">Layanan Pengaduan</a></li>
<li><a href="https://www.ruangguru.com/terms-conditions">Syarat & Ketentuan</a></li>
<li><a href="https://www.ruangguru.com/privacy-policy">Kebijakan Privasi</a></li>
<li><a href="https://www.ruangguru.com/about-us">Tentang Kami</a></li>
<li><a href="https://www.ruangguru.com/contact-us">Kontak Kami</a></li>
<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">
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<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>
</a>
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<picture>
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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>