因此,在图像本身无法加载的情况下,可以为其提供替代文本,但是图像映射呢?
是否可以为每个图像映射区域创建备份文本链接,图像本身是否应该不加载?
<map id="knightmap" name="knightmap">
<!--Hilt--><area shape="circle" coords="201,361 11"
href="http://uncyclopedia.wikia.com/wiki/HowTo:End_Him_Rightly"/>
<!--Banner--><area shape="rect" coords="278,309 351,636"
href="http://www.medievalchronicles.com/medieval-knights/knights-coat-of-
arms/"/>
<!--Sword--><area shape="poly" coords="195,335 157,346 112,303 149,271
95,10 125,5 172,150 200,261 220,324 "
href="https://en.wikipedia.org/wiki/Knightly_sword"/>
<!--Shield--><area shape="poly" coords="346,231 415,210 485,212 480,367
441,482 418,487" href="https://en.wikipedia.org/wiki/Kite_shield"/>
<!--Helm--><area shape="poly" coords="300,300 204,250 197,231 200,225
190,180 204,136 245,83 323,135 334,182 353,192 353,209 "
href="https://en.wikipedia.org/wiki/Close_helmet"/>
<!--Boot left--><area shape="poly" coords="203,597 226,604 228,614 195,627
145,630 143,620" href="https://en.wikipedia.org/wiki/Sabaton"/>
<!--Boot right--><area shape="poly" coords="434,700 450,687 491,704 488,719
433,719 " href="https://en.wikipedia.org/wiki/Sabaton"/>
</map>
<img src="images/lab9/knight.png" usemap="knightmap" class="center"
alt="Knight"/>
答案 0 :(得分:0)
如果area
element具有href
属性,则它必须具有alt
属性:
它指定超链接的文本。其值必须为文本,该文本告知用户链接的目的地。
因此img
-alt
描述了图像,area
-alt
描述了链接页面的内容。您可以在规范中找到an example:
<p>View houses for sale in North Katoomba or South Katoomba:</p> <p><img src="imagemap.png" width="209" alt="Map of Katoomba" height="249" usemap="#Map"> <map name="Map"> <area shape="poly" coords="78,124,124,10,189,29,173,93,168,132,136,151,110,130" href="north.html" alt="Houses in North Katoomba"> <area shape="poly" coords="66,63,80,135,106,138,137,154,167,137,175,133,144,240,49,223,17,137,17,61" alt="Houses in South Katoomba" href="south.html"> </map>