Artikel Matematika kelas 8 ini membahas mengenai konsep, rumus, serta contoh soal untuk mencari Un, Sn dari barisan aritmatika dan deret aritmatika. Pssst… Ada rumus cepatnya juga yang bakal dibahas. Yuk, simak!
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Kamu pasti sering kan dikasih uang jajan oleh ibumu? Setiap kamu berangkat sekolah, pasti ibumu sudah menyiapkan uang saku untuk kamu. Coba ingat-ingat deh jumlah uang saku yang diberikan ibumu dari kamu masih kelas 1 SD hingga kamu kelas 8 SMP. Apakah setiap tahunnya bertambah? Pastinya bertambah dong ya karena kebutuhan kamu di sekolah pun juga bertambah. Wah, kamu bisa lihat kan betapa baiknya ibumu kepadamu, jadi kalian harus berbakti juga kepadanya.
Nah, jika dilihat-lihat dari bertambahnya uang saku kamu setiap tahunnya, ternyata ini bisa disangkutkan ke materi barisan aritmatika, lho. Kok bisa?
Gini, misalnya jumlah uang saku kamu kelas 1 SD yaitu 5000, lalu uang sakumu ketika kamu kelas 2 SD bertambah menjadi 7000, kemudian uang sakumu ketika kelas 3 SD bertambah menjadi 9000, dan begitu seterusnya. Kalau diperhatikan, kenaikan uang saku kamu setiap tahunnya, yaitu 2000. Urutannya adalah 5000, 7000, 9000, … Nah, urutan jumlah uang saku kamu yang selalu naik dengan konstan (memiliki pola pertambahan yang tetap) inilah yang merupakan gambaran konsep dari barisan aritmatika.
Mau tau lebih lanjut bagaimana cara menghitung barisan dan deret aritmatika, serta apa saja sih rumus- rumusnya? Yuk, kita belajar bareng!
Pengertian Barisan Aritmatika
Barisan aritmatika (Un) adalah barisan bilangan yang memiliki pola yang tetap. Nah, polanya itu bisa berdasarkan operasi penjumlahan atau pengurangan. Jadi, setiap urutan suku memiliki selisih atau beda yang sama. Selisih inilah yang dinamakan beda. Biasa disimbolkan dengan b.
Misalnya, di suatu barisan memiliki suku pertama, yaitu 2. Suku pertama disimbolkan dengan U1 atau a. Lalu, di suku kedua (U2), yaitu 5. Suku ketiga (U3), yaitu 8, dan seterusnya. Berarti, barisan ini memiliki beda 3 pada setiap sukunya.
2, 5, 8, …
(setiap suku memiliki selisih atau beda, yaitu 3)
Rumus Barisan Aritmatika
Nah, untuk mencari suku ke-n (Un), kita bisa menggunakan rumusnya, lho. Rumus barisan aritmatika bisa kamu lihat di bawah ini, ya.
Oke, sekarang kita latihan soal mengenai barisan aritmatika yuk supaya kamu lebih paham materi ini.
Contoh Soal Barisan Aritmatika
Baca Juga: Belajar Barisan Aritmatika Bertingkat: Konsep Dasar, Rumus, dan Contoh Soal
Soal yang ada di atas tadi termasuk soal dengan tingkatan mudah karena suku pertama dan beda-nya bisa kita cari dengan mudah. Lalu, bagaimana kalau kamu disuruh untuk menyelesaikan soal yang suku pertamanya dan bedanya belum diketahui.
Rumus Cepat Barisan Aritmatika
Tenang, ada rumus cepat untuk mencari suku ke-n barisan aritmatika biar kamu tidak bingung mengerjakannya.
Nah, kamu sekarang sudah tahu kan rumusnya, langsung aja yuk kita kerjakan soalnya.
Pertama-tama, kamu harus mencari beda dari barisan tersebut terlebih dahulu. Caranya, lihat pada selisih dua suku yang berdekatan. Setelah kita dapatkan bahwa beda dari barisan tersebut adalah 3, langsung saja kita masukan ke dalam rumusnya.
Baca Juga: Cara Mencari Pola Bilangan dan Contoh Soalnya
Sudah paham belum? Kalau tadi kita belajar tentang barisan aritmatika, sekarang kita belajar tentang deret aritmatika.
Pengertian Deret Aritmatika
Deret aritmatika (Sn) adalah jumlah suku ke-n pada barisan aritmatika. Nah, di sini kita hanya menjumlahkan barisan aritmatikanya saja sampai ke suku yang diperintahkan. Misalnya, kamu diperintahkan untuk mencari deret aritmatika jumlah 5 suku pertama dari barisan yang tadi dibahas. Jadi seperti ini ya penjelasannya.
3, 7, 11, 15, 19, …
Jumlah 5 suku pertamanya berarti,
3 + 7 + 11 + 15 + 19 = 55
Rumus Deret Aritmatika
Lalu, bagaimana ya kalau mencari deret aritmatika jumlah 100 suku pertama dari suatu barisan? Nah, daripada kamu pusing menjumlahkan semua suku dari pertama sampai suku ke seratus, mending kamu memakai rumus deret aritmatikanya! Untuk rumus deret aritmatika, kamu bisa lihat dibawah ini yaa.
Jadi, sekarang sudah mengerti kan, biar kamu bisa menguasai materi ini, yuk kita coba untuk latihan soal lagi. Di bawah ini merupakan soal yang diambil dari soal UN tahun-tahun sebelumnya. Maka dari itu, soal-soal ini akan membantu kamu mempersiapkan UN nanti yaa.
Contoh Soal Deret Aritmatika
Baca Juga: Cara Menentukan Persamaan Garis Lurus, Pelajari Yuk!
Wah, tidak terasa kita telah mempelajari materi pengertian serta rumus barisan dan deret aritmatika, nih! Kalau kamu ingin mempelajari materi ini lebih menarik lagi dan juga menyenangkan, kamu bisa nih belajar melalui video animasi di ruangbelajar. Di sana, kamu bisa belajar sekaligus latihan soal-soal. Selain itu, waktu belajar kamu akan lebih efektif dan tidak akan menyita waktu bermain kamu. Jadi, tunggu apa lagi? Buruan download aplikasi ruangguru!
Referensi:
As’ari AR, Tohir M, dkk. (2017) Matematika Kelas VIII SMP/MTs. Edisi Revisi. Jakarta: Kementerian Pendidikan dan Kebudayaan
Artikel diperbarui pada 3 Oktober 2022.
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<h1 class="content-title">
Bedanya Rumus Barisan & Deret Aritmatika disertai Contoh Soal | Matematika Kelas 8 </h1>
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<p class="content-author"><a href="https://www.ruangguru.com/blog/author/thalitha-ariesti-widhia" class="">Thalitha Ariesti Widhia</a> </p>
<p class="content-info"><span>October 3, 2022 • </span> <span>4 minutes read</span></p>
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<p><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/barisan%20dan%20deret%20aritmatika.jpg" alt="rumus barisan aritmatika dan deret aritmatika" width="820" style="width: 820px; display: block; margin: 0px auto;"></p>
<blockquote>
<p style="text-align: justify; font-size: 16px;"><em><a href="/blog/tag/matematika-viii" rel="noopener" style="font-weight: bold;">Artikel Matematika kelas 8</a> ini membahas mengenai konsep, rumus, serta contoh soal untuk mencari Un, Sn dari barisan aritmatika dan deret aritmatika. Pssst… Ada rumus cepatnya juga yang bakal dibahas. Yuk, simak!</em></p>
</blockquote>
<p style="text-align: center;"><em>—</em></p>
<p style="text-align: center;"><em><span id="more-1396"></span></em></p>
<p style="text-align: justify;">Kamu pasti sering <em>kan</em> dikasih uang jajan oleh ibumu? Setiap kamu berangkat sekolah, pasti ibumu sudah menyiapkan uang saku untuk kamu. Coba ingat-ingat <em>deh</em> jumlah uang saku yang diberikan ibumu dari kamu masih kelas 1 SD hingga kamu kelas 8 SMP. Apakah setiap tahunnya bertambah? Pastinya bertambah <em>dong</em> ya karena kebutuhan kamu di sekolah pun juga bertambah. <em>Wah,</em> kamu bisa lihat <em>kan</em> betapa baiknya ibumu kepadamu, jadi kalian harus berbakti juga kepadanya.</p>
<p style="text-align: justify;"><em>Nah,</em> jika dilihat-lihat dari bertambahnya uang saku kamu setiap tahunnya, ternyata ini bisa disangkutkan ke materi barisan aritmatika, <em>lho</em>. <em>Kok</em> bisa?</p>
<p style="text-align: justify;">Gini, misalnya jumlah uang saku kamu kelas 1 SD yaitu 5000, lalu uang sakumu ketika kamu kelas 2 SD bertambah menjadi 7000, kemudian uang sakumu ketika kelas 3 SD bertambah menjadi 9000, dan begitu seterusnya. Kalau diperhatikan, kenaikan uang saku kamu setiap tahunnya, yaitu 2000. Urutannya adalah 5000, 7000, 9000, … <em>Nah,</em> urutan jumlah uang saku kamu yang selalu naik dengan konstan (memiliki pola pertambahan yang tetap) inilah yang merupakan gambaran konsep dari barisan aritmatika.</p>
<p style="text-align: justify;">Mau <em>tau</em> lebih lanjut bagaimana cara menghitung barisan dan deret aritmatika, serta apa saja sih rumus- rumusnya? <em>Yuk,</em> kita belajar bareng!</p>
<p style="font-weight: bold;"> </p>
<h2 style="font-size: 20px;">Pengertian Barisan Aritmatika</h2>
<p style="text-align: justify;"><strong>Barisan aritmatika (Un)</strong> <span style="font-weight: bold;">adalah</span> <strong>barisan bilangan yang memiliki pola yang</strong> <strong>tetap</strong>. <em>Nah</em>, polanya itu bisa berdasarkan operasi penjumlahan atau pengurangan. Jadi, setiap urutan suku memiliki selisih atau beda yang sama. Selisih inilah yang dinamakan <strong>beda</strong>. Biasa disimbolkan dengan <strong>b</strong>.</p>
<p style="text-align: justify;">Misalnya, di suatu barisan memiliki suku pertama, yaitu 2. <strong>Suku pertama</strong> disimbolkan dengan <strong>U<sub>1</sub></strong> atau<strong> a</strong>. Lalu, di suku kedua (U<sub>2</sub>), yaitu 5. Suku ketiga (U<sub>3</sub>), yaitu 8, dan seterusnya. Berarti, barisan ini memiliki beda 3 pada setiap sukunya.</p>
<p style="font-size: 24px; text-align: center;"><strong>2, 5, 8, …</strong></p>
<p style="text-align: center;">(setiap suku memiliki selisih atau beda, yaitu 3)</p>
<p style="text-align: center;"> </p>
<div><img decoding="async" src="https://lh3.googleusercontent.com/7ktMDC_k56QkEWJEPjsr9rGBuUQGQkJQuBnHGtHXzFq2Wz1dECTVCk2eVJvcPa3Wx4PJq70nlgNS-xAP-bcfGWS2f9PFX8oafN9Lv2ZiTw2rVtXZ9R3BfQVeKwb7riEaAbTxQPIR" alt="" style="width: 338px; display: block; margin: 0px auto;" width="338"></div>
<h2 style="text-align: justify; font-size: 20px;">Rumus Barisan Aritmatika</h2>
<p style="text-align: justify;"><em>Nah</em>, untuk mencari suku ke-n (Un), kita bisa menggunakan rumusnya, <em>lho</em>. Rumus barisan aritmatika bisa kamu lihat di bawah ini, ya.</p>
<p><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/rumus%20barisan%20aritmatika.jpg" alt="rumus barisan aritmatika" width="600" style="width: 600px; display: block; margin: 0px auto;"><img decoding="async" src="https://lh6.googleusercontent.com/Z6yM5n9d8CMkEYX1CAnK5JMNL-vKlBfgcemdF6kLyyNSyzoL1JKdCfyUCwarSu1afONOBTwN0qqiMIktyuXh1_fQ4h0H-9Yht3ZAqWFW9cfJphbMyifzCsYrmGZpMAI2m75vrEow" alt="" style="width: 323px;" width="323"></p>
<p style="text-align: justify;">Oke, sekarang kita latihan soal mengenai barisan aritmatika yuk supaya kamu lebih paham materi ini.</p>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;">Contoh Soal Barisan Aritmatika</h2>
<p></p>
<p><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/contoh%20soal%20barisan%20aritmatika.jpg" alt="contoh soal barisan aritmatika" width="600" style="width: 600px; display: block; margin: 0px auto;"></p>
<p style="font-weight: bold;">Baca Juga: <a href="/blog/barisan-aritmatika-bertingkat-konsep-dasar-rumus-dan-contoh-soal" rel="noopener">Belajar Barisan Aritmatika Bertingkat: Konsep Dasar, Rumus, dan Contoh Soal</a></p>
<div> </div>
<p style="text-align: justify;">Soal yang ada di atas tadi termasuk soal dengan tingkatan mudah karena suku pertama dan beda-nya bisa kita cari dengan mudah. Lalu, bagaimana kalau kamu disuruh untuk menyelesaikan soal yang suku pertamanya dan bedanya belum diketahui.</p>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;">Rumus Cepat Barisan Aritmatika</h2>
<p style="text-align: justify;">Tenang, ada rumus cepat untuk mencari suku ke-n barisan aritmatika biar kamu tidak bingung mengerjakannya.</p>
<p><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/08MAT%20-%20Barisan%20dan%20Deret%20Aritmatika-%20Rumus%20Un%2c%20Sn%2c%20dan%20Rumus%20Cepat-02.jpg" alt="Rumus Cepat Barisan Aritmatika" width="600" loading="lazy" style="width: 600px; margin-left: auto; margin-right: auto; display: block;"></p>
<p style="text-align: justify;"> </p>
<p style="text-align: justify;"><em>Nah</em>, kamu sekarang sudah tahu <em>kan</em> rumusnya, langsung <em>aja yuk</em> kita kerjakan soalnya.</p>
<p><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/08MAT%20-%20Barisan%20dan%20Deret%20Aritmatika-%20Rumus%20Un%2c%20Sn%2c%20dan%20Rumus%20Cepat-01.jpg" alt="08MAT - Barisan dan Deret Aritmatika- Rumus Un, Sn, dan Rumus Cepat-01" width="600" loading="lazy" style="width: 600px; margin-left: auto; margin-right: auto; display: block;"></p>
<p style="text-align: justify;"> </p>
<p style="text-align: justify;">Pertama-tama, kamu harus mencari beda dari barisan tersebut terlebih dahulu. Caranya, lihat pada selisih dua suku yang berdekatan. Setelah kita dapatkan bahwa beda dari barisan tersebut adalah 3, langsung saja kita masukan ke dalam rumusnya.</p>
<p style="text-align: justify;"><span style="font-weight: bold;">Baca Juga:</span> <a href="/blog/matematika-kelas-8-smp-mencari-pola-bilangan" rel="noopener"><strong>Cara Mencari Pola Bilangan dan Contoh Soalnya</strong></a></p>
<p style="text-align: justify;">Sudah paham belum? Kalau tadi kita belajar tentang barisan aritmatika, sekarang kita belajar tentang deret aritmatika.</p>
<p style="text-align: justify;"> </p>
<h2 style="font-size: 20px;">Pengertian Deret Aritmatika</h2>
<p style="text-align: justify;"><strong>Deret aritmatika (Sn) </strong><span style="font-weight: bold;">adalah</span><strong> jumlah suku ke-n pada barisan aritmatika. </strong><em>Nah</em>, di sini kita hanya menjumlahkan barisan aritmatikanya saja sampai ke suku yang diperintahkan. Misalnya, kamu diperintahkan untuk mencari deret aritmatika jumlah 5 suku pertama dari barisan yang tadi dibahas. Jadi seperti ini ya penjelasannya.</p>
<p style="text-align: center; font-size: 24px;"><strong>3, 7, 11, 15, 19, …</strong></p>
<p style="text-align: justify;">Jumlah 5 suku pertamanya berarti,</p>
<p style="text-align: center; font-size: 24px;"><strong>3 + 7 + 11 + 15 + 19 = 55</strong></p>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;">Rumus Deret Aritmatika</h2>
<p style="text-align: justify;">Lalu, bagaimana ya kalau mencari deret aritmatika jumlah 100 suku pertama dari suatu barisan? <em>Nah</em>, daripada kamu pusing menjumlahkan semua suku dari pertama sampai suku ke seratus, <em>mending</em> kamu memakai rumus deret aritmatikanya! Untuk rumus deret aritmatika, kamu bisa lihat dibawah ini yaa.</p>
<p><img decoding="async" src="https://cdn-web.ruangguru.com/landing-pages/assets/hs/rumus%20deret%20aritmatika.jpg" alt="rumus deret aritmatika" width="600" style="width: 600px; display: block; margin: 0px auto;"></p>
<p style="text-align: justify;"> </p>
<p style="text-align: justify;">Jadi, sekarang sudah mengerti <em>kan, biar</em> kamu bisa menguasai materi ini, <em>yuk</em> kita coba untuk latihan soal lagi. Di bawah ini merupakan soal yang diambil dari soal UN tahun-tahun sebelumnya. Maka dari itu, soal-soal ini akan membantu kamu mempersiapkan UN nanti yaa.</p>
<p style="text-align: justify;"> </p>
<h2 style="text-align: justify; font-size: 20px;">Contoh Soal Deret Aritmatika</h2>
<p></p>
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<p style="text-align: justify; font-weight: bold;">Baca Juga: <a href="/blog/matematika-kelas-8-cara-menentukan-persamaan-garis-lurus" rel="noopener">Cara Menentukan Persamaan Garis Lurus, Pelajari Yuk!</a></p>
<p style="text-align: justify;"> </p>
<p style="text-align: justify;"><em>Wah</em>, tidak terasa kita telah mempelajari materi pengertian serta rumus barisan dan deret aritmatika, <em>nih</em>! Kalau kamu ingin mempelajari materi ini lebih menarik lagi dan juga menyenangkan, kamu bisa <em>nih</em> belajar melalui video animasi di <strong>ruangbelajar</strong>. Di sana, kamu bisa belajar sekaligus latihan soal-soal. Selain itu, waktu belajar kamu akan lebih efektif dan tidak akan menyita waktu bermain kamu. Jadi, tunggu apa lagi? Buruan <em>download</em> aplikasi ruangguru!</p>
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<p style="text-align: left;"><strong>Referensi:</strong></p>
<p style="text-align: left;">As’ari AR, Tohir M, dkk. (2017) Matematika Kelas VIII SMP/MTs. Edisi Revisi. Jakarta: Kementerian Pendidikan dan Kebudayaan</p>
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<p style="text-align: left; font-weight: bold;"><em>Artikel diperbarui pada 3 Oktober 2022.</em></p>
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<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/youtube.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/youtube.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/youtube.png" loading=" lazy" alt="Logo Youtube Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.linkedin.com/company/ruangguru-com">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/linkedin.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/linkedin.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/linkedin.png" loading=" lazy" alt="Logo LinkedIn Footer" width="32px" height="32px" />
</picture>
</a>
<a target="_blank" href="https://www.tiktok.com/@ruangguru">
<picture>
<source srcset="https://cdn-web-2.ruangguru.com/static/tiktok.png?height=60&convert=webp" type="image/webp">
<source srcset="https://cdn-web-2.ruangguru.com/static/tiktok.png?height=60" type="image/png">
<img src="https://cdn-web-2.ruangguru.com/static/tiktok.png" loading=" lazy" alt="Logo TikTok Footer" width="32px" height="32px" />
</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>