coords
HTML coords Attribute （HTML COORDS属性）
The HTML coords attribute specifies the coordinates of an area in the image-map. To specify the shape, size, and placement of an area, it is used with the shape attribute. （HTML坐标属性指定图像映射中某个区域的坐标。要指定区域的形状、大小和位置，它与形状属性一起使用。）
You can use this attribute on the <area> element.
The top-left corner of an area has the 0,0 coordinates. （区域的左上角具有0,0坐标。）
The coords attribute can have the following values: （Coords属性可以具有以下值：）
x1, y1, x2, y2. It specifies a rectangle’s top-left (x1, y1) and bottom-right (x2, y2) corner coordinates. （- x1、y1、x2、y2。它指定矩形的左上角(x1, y1)和右下角(x2, y2)坐标。）
x, y, radius. It specifies a circle’s center coordinates (x, y) and radius (radius). （- x, y,半径。它指定圆的中心坐标（ x, y ）和半径（半径）。）
x1, y1, x2, y2, .., xn, yn. It specifies a polygon’s coordinates. （- x1、y1、x2、y2、..、xn、yn。它指定多边形的坐标。）
Syntax
Syntax （语法）
<area coords="value">
Example of the HTML coords Attribute:
<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
</head>
<body>
<p>Click on the logo or on one of the logo item to watch it closer:</p>
<img src="/uploads/media/news_gallery/0001/01/thumb_316_news_gallery_list.jpeg" width="250" height="150" alt="block" usemap="#blockmap">
<map name="blockmap">
<area shape="circle" coords="50,32,25" alt="html" href="/uploads/media/book_gallery/0001/01/d450f0358f947dffb3af91195c3002600d74101b.png">
<area shape="circle" coords="218,115,25" alt="css" href="/uploads/media/book_gallery/0001/01/25521e981b34da57c8f51baddc5b76351b855818.png">
<area shape="circle" coords="195,32,28" alt="php" href="/uploads/media/book_gallery/0001/01/4bbee6698c4884f25c46010d61b658dd62d2c04f.png">
<area class="homepage" shape="rect" coords="90,90,35,55" alt="php" href="https://www.w3cdoc.com/">
</map>
</body>
</html>