HTML Checking for Large Sites
Rocket Validator automatically checks your pages on the W3C Validator.
HTML issues tagged as sizes.
The sizes attribute is used to complement the srcset attribute on an <img> tag for responsive images, therefore it’s not valid if srcset is missing. Check the HTMLImageElement.srcset guide to learn about the correct usage of the srcset and sizes attributes.
Check the HTMLImageElement.srcset guide to learn about the correct usage of the srcset and sizes attributes.
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Let our automated scanner check your large sites using Axe Core and W3C Validator.