HTML Alt Attribute - W3Schools

Trang chủ » Html Td Alternate Text » HTML Alt Attribute - W3Schools

Có thể bạn quan tâm

HTML alt Attribute ❮ Previous All HTML Attributes Next ❯

Definition and Usage

The alt attribute provides alternative information for an image if a user for some reason cannot view it (because of slow connection, an error in the src attribute, or if the user uses a screen reader).

Note: The alt attribute is required for the <img> element.

Note: For <input> elements, the alt attribute can only be used with <input type="image">.

Tip: To create a tooltip for an image, use the title attribute!

Applies to

The alt attribute can be used on the following elements:

Elements Attribute
<area> alt
<img> alt
<input> alt

Examples

Area Example

An image map, with clickable areas:

<img src="planets.gif" width="145" height="126" alt="Planets" usemap="#planetmap"> <map name="planetmap"> <area shape="rect" coords="0,0,82,126" href="sun.htm" alt="Sun"> <area shape="circle" coords="90,58,3" href="mercur.htm" alt="Mercury"> <area shape="circle" coords="124,58,8" href="venus.htm" alt="Venus"> </map> Try it Yourself »

Img Example

An image with an alternate text specified:

<img src="smiley.gif" alt="Smiley face"> Try it Yourself »

Input Example

An HTML form with an image that represents the submit button:

<form action="/action_page.php"> First name: <input type="text" name="fname"><br> <input type="image" src="submit.gif" alt="Submit" width="48" height="48"> </form> Try it Yourself »

Browser Support

The alt attribute has the following browser support for each element:

Element
area Yes Yes Yes Yes Yes
img Yes Yes Yes Yes Yes
input Yes Yes Yes Yes Yes
❮ Previous All HTML Attributes Next ❯ ★ +1 Track your progress - it's free! Log in Sign Up

Từ khóa » Html Td Alternate Text