Which attributes are required for img

Select personalised content. Create a personalised content profile. Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance. Develop and improve products. List of Partners vendors. Share Flipboard Email. Jennifer Kyrnin.

Updated March 08, Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use , cookie and privacy policy.

Copyright by Refsnes Data. All Rights Reserved. How do I find html development projects? What should I major in to become a html developer? What is the starting salary for a html developer? Can html developers work from home? Ask a Question. Formatting: Spelling, grammar or punctuation errors. Personal Attack: Disrespectful content about a person. Insincere Question: Question not seeking real answers.

Incorrect Topics: Broad or inaccurate topics. Spam: Link or advertisement for a product. Not in English: Content in a different language. Not a Helpful Response: Does not address question. Images Need Explanation: Image-only or meme answer. Incomplete Attribution: Copied text without blockquote and source. Missing Affiliations: Undisclosed relationship to topics. The src attribute is ignored in user agents that support srcset when w descriptors are included.

When the max-width: px media condition matches, the pixel-wide image will load it is the one that matches px most closely , otherwise the other image will load.

Note: To see the resizing in action, view the example on a separate page , so you can actually resize the content area. See Referer header: privacy and security concerns for more information and mitigations. An alt attribute's value should clearly and concisely describe the image's content. It should not describe the presence of the image itself or the file name of the image. If the alt attribute is purposefully left off because the image has no textual equivalent, consider alternate methods to present what the image is trying to communicate.

When an alt attribute is not present on an image, some screen readers may announce the image's file name instead. This can be a confusing experience if the file name isn't representative of the image's contents. The title attribute is not an acceptable substitute for the alt attribute. Additionally, avoid duplicating the alt attribute's value in a title attribute declared on the same image.

Doing so may cause some screen readers to announce the description twice, creating a confusing experience. The title attribute should also not be used as supplemental captioning information to accompany an image's alt description. If an image needs a caption, use the figure and figcaption elements. The value of the title attribute is usually presented to the user as a tooltip, which appears shortly after the cursor stops moving over the image.

While this can provide additional information to the user, you should not assume that the user will ever see it: the user may only have keyboard or touchscreen. If you have information that's particularly important or valuable for the user, present it inline using one of the methods mentioned above instead of using title.

The alt attribute holds a text description of the image, which isn't mandatory but is incredibly useful for accessibility — screen readers read this description out to their users so they know what the image means. Alt text is also displayed on the page if the image can't be loaded for some reason: for example, network errors, content blocking, or linkrot. Use both width and height to set the intrinsic size of the image, allowing it to take up space before it loads, to mitigate content layout shifts.

This can happen in a number of situations, including: The src attribute is empty "" or null. The image is corrupted in some way that prevents it from being loaded. The image is in a format not supported by the user agent.