Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
The element “a” must not appear as a descendant of the “button” element.
Stray end tag “div”.
End tag “br”.
Stray end tag “span”.
Bad value “images/banners/intro-S.jpg 138w, images/banners/intro-S.jpg 138w” for attribute “srcset” on element “source”: Width for image “images/banners/intro-S.jpg” is identical to width for image “images/banners/intro-S.jpg”.
Bad value “(max-width: 768x)” for attribute “media” on element “source”: Expected a length unit but saw “)” instead.
Bad value “images/banners/intro-M.jpg 416w, images/banners/intro-M.jpg 416w” for attribute “srcset” on element “source”: Width for image “images/banners/intro-M.jpg” is identical to width for image “images/banners/intro-M.jpg”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “https://www.learningandthebrain.com/images/banners/7d783_Boston-phone-4.jpg 138w, https://www.learningandthebrain.com/images/banners/7d783_Boston-phone-4.jpg 138w” for attribute “srcset” on element “source”: Width for image “https://www.learningandth…/7d783_Boston-phone-4.jpg” is identical to width for image “https://www.learningandth…/7d783_Boston-phone-4.jpg”.
Bad value “https://www.learningandthebrain.com/images/banners/68105_AdobeStock_94181434-fall-2ipad.jpg 416w, https://www.learningandthebrain.com/images/banners/68105_AdobeStock_94181434-fall-2ipad.jpg 416w” for attribute “srcset” on element “source”: Width for image “https://www.learningandth…k_94181434-fall-2ipad.jpg” is identical to width for image “https://www.learningandth…k_94181434-fall-2ipad.jpg”.
No “p” element in scope but a “p” end tag seen.
Bad value for attribute “srcset” on element “source”: Width for image “https://www.learningandth…ducation-confrences-S.jpg” is identical to width for image “https://www.learningandth…ducation-confrences-S.jpg”.
Bad value for attribute “srcset” on element “source”: Width for image “https://www.learningandth…ducation-confrences-M.jpg” is identical to width for image “https://www.learningandth…ducation-confrences-M.jpg”.
Bad value “https://www.learningandthebrain.com/images/banners/13845_brooklyn-s.jpg 138w, https://www.learningandthebrain.com/images/banners/13845_brooklyn-s.jpg 138w” for attribute “srcset” on element “source”: Width for image “https://www.learningandth…ners/13845_brooklyn-s.jpg” is identical to width for image “https://www.learningandth…ners/13845_brooklyn-s.jpg”.
Bad value “https://www.learningandthebrain.com/images/banners/cbddd_brooklyn-m.jpg 416w, https://www.learningandthebrain.com/images/banners/cbddd_brooklyn-m.jpg 416w” for attribute “srcset” on element “source”: Width for image “https://www.learningandth…ners/cbddd_brooklyn-m.jpg” is identical to width for image “https://www.learningandth…ners/cbddd_brooklyn-m.jpg”.
Bad value “images/banners/seminars-S.jpg 138w, images/banners/seminars-S.jpg 138w” for attribute “srcset” on element “source”: Width for image “images/banners/seminars-S.jpg” is identical to width for image “images/banners/seminars-S.jpg”.
Bad value “images/banners/seminars-M.jpg 416w, images/banners/seminars-M.jpg 416w” for attribute “srcset” on element “source”: Width for image “images/banners/seminars-M.jpg” is identical to width for image “images/banners/seminars-M.jpg”.
Bad value “images/banners/summer-institutes-S.jpg 138w, images/banners/summer-institutes-S.jpg 138w” for attribute “srcset” on element “source”: Width for image “images/banners/summer-institutes-S.jpg” is identical to width for image “images/banners/summer-institutes-S.jpg”.
Bad value “images/banners/summer-institutes-M.jpg 416w, images/banners/summer-institutes-M.jpg 416w” for attribute “srcset” on element “source”: Width for image “images/banners/summer-institutes-M.jpg” is identical to width for image “images/banners/summer-institutes-M.jpg”.
Duplicate ID “title-sold-out”.
Duplicate attribute “class”.
No space between attributes.
Attribute “r” not allowed on element “a” at this point.
Attribute “alt” not allowed on element “a” at this point.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
The “aria-describedby” attribute must point to an element in the same document.
Warnings:
The “language” attribute on the “script” element is obsolete. You can safely omit it.
The first occurrence of ID “title-sold-out” was here.
The “form” role is unnecessary for element “form”.
United States US