HTML <img> longdesc 属性

HTML <img> 标籤

Paglilingkuran at paggamit

longdesc attribute na nagtatalaga ng hyperlink patungo sa detalyadong paglalarawan ng imahe.

detail

<img> tag longdesc attribute ng attribute na attribute na altlongdesc katulad, ngunit pinapayagan itong mas mahabang paglalarawan. longdesc Ang value ay URL na patungo sa dokumento na naglalaman ng paglalarawan ng imahe. Kung ang paglalarawan ay mahigit sa 1024 na character, maaaring gamitin

Wala kahit anong pagtatalaga sa kung anong nilalaman ng paglalarawan sa HTML o XHTML, at sa kasalukuyan ay walang suporta ng mga browser sa pagtatalaga ng attribute na magtatalaga ng link dito. longdesc attribute. Kaya, para sa paglikha ng mga malaking paglalarawan, ang aking rekomendasyon ay gumawa ng hyperlink patungo sa pahina na naglalaman ng paglalarawan.

alt Ang attribute na ito ay napakatulong sa mga may kapansanan, at dahil sa malinaw na dahilan,longdesc Ang attribute ay mas mahusay na opsyon.

Halimbawa

Ilang halimbawa ng paggamit ng attribute na longdesc:

<!-- Ang paglalarawan na ito ay nasa parehong pahina ng imahe -->
<img src="w3html.gif" alt="W3Schools.com" width="100" height="132" longdesc="#w3htmlExplained">
<!-- Ang paglalarawan na ito ay nasa labas ng pahina -->
<img src="w3html.gif" alt="W3Schools.com" width="100" height="132" longdesc="w3html.txt">
<!-- Ang paglalarawan na ito ay isa sa maraming paglalarawan sa labas ng pahina -->
<img src="w3html.gif" alt="W3Schools.com" width="100" height="132" longdesc="http://example.com/desc#item3">
<!-- Ang paglalarawan na ito ay kasama sa data:URI -->
<img src="w3html.gif" alt="W3Schools.com" width="100" height="132" longdesc="data:text/html;charset=utf-8;,%3C!DOCTYPE%20html%3E%3Chtml%3E%3Chead%3E%3Ctitle%3EDescription%20of%20the%20Logo%3C/title%3E%3C/head%3E%3Cbody%3E%3Cp%3ESome%20description%20goes%20here%3C/body%3E%3C/html%3E">

ทดลองด้วยตัวเอง

ภาษาเกณฑ์

<img longdesc="string">

ค่าของอัตราแบบ

ค่า รายละเอียด
string

กำหนดลิงก์ที่นำไปสู่รายละเอียดภาพ

ค่าที่เป็นไปได้:

  • id ของอีกส่วนหนึ่งขององค์ประกอบ
  • URL ที่มีสาย - หนุ่มนำไปสู่เว็บไซต์อื่น (เช่น longdesc="http://www.example.com/description.txt")
  • URL ที่ไม่มีสาย - หนุ่มนำไปสู่ไฟล์ภายในเว็บไซต์ (เช่น longdesc="description.txt")

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HTML <img> 标籤