รูปภาพแบบตอบสนองและองค์ประกอบ Picture

ความท้าทายของรูปภาพที่ปรับตามหน้าจอ

พื้นฐาน max-width: 100%

<img src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='1200' height='700'><rect width='1200' height='700' fill='%234f8cff'/><circle cx='600' cy='350' r='260' fill='%23ffb84d'/></svg>" alt="wide landscape" />

ใช้ srcset สำหรับความละเอียดต่างกัน

<img
  src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='800' height='500'><rect width='800' height='500' fill='%234f8cff'/><circle cx='400' cy='250' r='180' fill='%237ee787'/></svg>"
  srcset="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='800' height='500'><rect width='800' height='500' fill='%234f8cff'/><circle cx='400' cy='250' r='180' fill='%237ee787'/></svg> 1x, data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='1600' height='1000'><rect width='1600' height='1000' fill='%234f8cff'/><circle cx='800' cy='500' r='360' fill='%237ee787'/></svg> 2x"
  alt="A beautiful landscape"
  style="max-width:100%;height:auto;display:block;"
>

srcset พร้อมตัวระบุความกว้าง

<img
  src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='800' height='500'><rect width='800' height='500' fill='%23ffb84d'/></svg>"
  srcset="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='400' height='250'><rect width='400' height='250' fill='%23ffb84d'/></svg> 400w,
          data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='800' height='500'><rect width='800' height='500' fill='%23ffb84d'/></svg> 800w,
          data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='1600' height='1000'><rect width='1600' height='1000' fill='%23ffb84d'/></svg> 1600w"
  alt="Hero image"
  style="max-width:100%;height:auto;display:block;"
>

แอตทริบิวต์ sizes

<img
  srcset="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='400' height='250'><rect width='400' height='250' fill='%23ffb84d'/></svg> 400w, data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='800' height='500'><rect width='800' height='500' fill='%23ffb84d'/></svg> 800w"
  sizes="(max-width: 600px) 100vw, 50vw"
  src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='800' height='500'><rect width='800' height='500' fill='%23ffb84d'/></svg>"
  alt="Product photo"
  style="max-width:100%;height:auto;display:block;"
>

องค์ประกอบ picture

<picture>
  <source media="(min-width: 1024px)" srcset="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='1200' height='400'><rect width='1200' height='400' fill='%234f8cff'/><text x='30' y='220' font-size='40' fill='white'>hero-large</text></svg>">
  <source media="(min-width: 600px)"  srcset="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='800' height='400'><rect width='800' height='400' fill='%237ee787'/><text x='30' y='220' font-size='36' fill='white'>hero-medium</text></svg>">
  <img src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='500' height='500'><rect width='500' height='500' fill='%23ffb84d'/><text x='20' y='260' font-size='30' fill='white'>hero-small</text></svg>" alt="Hero image" style="max-width:100%;height:auto;display:block;">
</picture>

การจัดองค์ประกอบภาพด้วย picture

<picture>
  <!-- Wide crop for desktop -->
  <source media="(min-width: 768px)" srcset="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='1200' height='300'><rect width='1200' height='300' fill='%23b57bff'/><text x='30' y='170' font-size='34' fill='white'>banner-wide (desktop crop)</text></svg>">
  <!-- Square crop for mobile (this preview is narrow, so this is what renders) -->
  <img src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='500' height='500'><rect width='500' height='500' fill='%23b57bff'/><text x='20' y='260' font-size='26' fill='white'>banner-square (mobile crop)</text></svg>" alt="Banner" style="max-width:100%;height:auto;display:block;">
</picture>

รูปแบบรูปภาพสมัยใหม่: WebP และ AVIF

<picture>
  <source type="image/avif" srcset="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='600' height='400'><rect width='600' height='400' fill='%233fd0c9'/><text x='20' y='210' font-size='28' fill='white'>photo</text></svg>">
  <source type="image/webp" srcset="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='600' height='400'><rect width='600' height='400' fill='%233fd0c9'/><text x='20' y='210' font-size='28' fill='white'>photo</text></svg>">
  <img src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='600' height='400'><rect width='600' height='400' fill='%233fd0c9'/><text x='20' y='210' font-size='28' fill='white'>photo</text></svg>" alt="Photo" style="max-width:100%;height:auto;display:block;">
</picture>

loading="lazy" เพื่อประสิทธิภาพ

<img
  src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='500' height='500'><rect width='500' height='500' fill='%23ff6b6b'/><text x='20' y='260' font-size='26' fill='white'>product</text></svg>"
  loading="lazy"
  decoding="async"
  alt="Product"
  style="max-width:100%;height:auto;display:block;"
>

แอตทริบิวต์ width และ height

<img src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='800' height='600'><rect width='800' height='600' fill='%234f8cff'/><circle cx='400' cy='300' r='200' fill='%23ffd700'/></svg>" width="800" height="600" loading="lazy" alt="Photo" style="max-width:100%;height:auto;">

object-fit สำหรับรูปภาพในคอนเทนเนอร์

<img class="thumbnail" src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='800' height='300'><rect width='800' height='300' fill='%23b57bff'/><text x='20' y='170' font-size='30' fill='white'>wide source photo</text></svg>" alt="thumbnail" />

ตรวจสอบความเข้าใจอย่างรวดเร็ว

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