Elifesciences.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “/assets/patterns/img/patterns/organisms/elife-logo-full.b1283c9a.svg” for attribute “srcset” on element “source”: No width specified for image “/assets/patterns/img/patt…fe-logo-full.b1283c9a.svg”. (When the “sizes” attribute is present, all image candidate strings must specify a width.)
Bad value “/assets/patterns/img/patterns/organisms/elife-logo-symbol.6f18db13.svg” for attribute “srcset” on element “source”: No width specified for image “/assets/patterns/img/patt…-logo-symbol.6f18db13.svg”. (When the “sizes” attribute is present, all image candidate strings must specify a width.)
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
A “source” element that has a following sibling “source” element or “img” element with a “srcset” attribute must have a “media” attribute and/or “type” attribute.
Duplicate ID “listing”.
Warnings:
The “main” role is unnecessary for element “main”.
The first occurrence of ID “listing” was here.
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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