Rocket Validator logo
Show only this issue Error L 31 C 1 Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.

</script> <link rel='https://api.w.org/' href='https://www.stanford.edu/wp-json/' /> <link

Show only this issue Error L 50 C 3 The “itemprop” attribute was specified, but the element is not a property of any item.

org --> <meta itemprop="name" content="About Stanford"/> <me

Show only this issue Error L 51 C 3 The “itemprop” attribute was specified, but the element is not a property of any item.

ford"/> <meta itemprop="headline" content="About Stanford"/> <me

Show only this issue Error L 52 C 3 The “itemprop” attribute was specified, but the element is not a property of any item.

ford"/> <meta itemprop="description" content="Stanford University is one of the world&#039;s leading teaching and research universities. Since its opening in 1891, Stanford has been dedicated to finding solutions to big challenges and to preparing students for leadership in a complex world."/> <me

Show only this issue Error L 53 C 3 The “itemprop” attribute was specified, but the element is not a property of any item.

rld."/> <meta itemprop="image" content="https://stanfordhs17.wpengine.com/wp-content/uploads/2017/06/white-plaza-splash-3x2.jpg"/> <li

Show only this issue Error L 196 C 7 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/03/24182714/about_landing-1.jpg 1354w, https://www-media.stanford.edu/wp-content/uploads/2017/03/24182714/about_landing-1-300x120.jpg 300w, https://www-media.stanford.edu/wp-content/uploads/2017/03/24182714/about_landing-1-1024x410.jpg 1024w, https://www-media.stanford.edu/wp-content/uploads/2017/03/24182714/about_landing-1-600x240.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/03/24182714/about_landing-1-500x200.jpg 500w" /> <

Show only this issue Error L 241 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/03/11120759/about-stanford.jpeg 800w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11120759/about-stanford-767x479.jpeg 767w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11120759/about-stanford-575x359.jpeg 575w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11120759/about-stanford-600x375.jpeg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11120759/about-stanford-500x313.jpeg 500w" /> <

Show only this issue Error L 258 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/03/11115827/about-stanford-2.jpg 767w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11115827/about-stanford-2-575x360.jpg 575w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11115827/about-stanford-2-600x375.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11115827/about-stanford-2-500x313.jpg 500w" /> <

Show only this issue Error L 275 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/05/11120211/admin-highlight.jpg 800w, https://www-media.stanford.edu/wp-content/uploads/2017/05/11120211/admin-highlight-767x479.jpg 767w, https://www-media.stanford.edu/wp-content/uploads/2017/05/11120211/admin-highlight-575x359.jpg 575w, https://www-media.stanford.edu/wp-content/uploads/2017/05/11120211/admin-highlight-600x375.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/05/11120211/admin-highlight-500x313.jpg 500w" /> <

Show only this issue Error L 305 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/03/09163847/about-stanford-4.jpg 1534w, https://www-media.stanford.edu/wp-content/uploads/2017/03/09163847/about-stanford-4-767x480.jpg 767w, https://www-media.stanford.edu/wp-content/uploads/2017/03/09163847/about-stanford-4-1023x640.jpg 1023w, https://www-media.stanford.edu/wp-content/uploads/2017/03/09163847/about-stanford-4-575x360.jpg 575w, https://www-media.stanford.edu/wp-content/uploads/2017/03/09163847/about-stanford-4-1499x938.jpg 1499w, https://www-media.stanford.edu/wp-content/uploads/2017/03/09163847/about-stanford-4-600x375.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/03/09163847/about-stanford-4-500x313.jpg 500w" /> <

Show only this issue Error L 322 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/05/09164206/about-then-now.jpg 1534w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164206/about-then-now-767x480.jpg 767w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164206/about-then-now-1023x640.jpg 1023w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164206/about-then-now-575x360.jpg 575w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164206/about-then-now-1499x938.jpg 1499w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164206/about-then-now-600x375.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164206/about-then-now-500x313.jpg 500w" /> <

Show only this issue Error L 339 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/05/09164547/about-timeline.jpeg 1279w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164547/about-timeline-767x480.jpeg 767w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164547/about-timeline-1023x640.jpeg 1023w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164547/about-timeline-575x360.jpeg 575w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164547/about-timeline-600x375.jpeg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/05/09164547/about-timeline-500x313.jpeg 500w" /> <

Show only this issue Error L 370 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2018/01/24160831/be-here-360.jpg 1536w, https://www-media.stanford.edu/wp-content/uploads/2018/01/24160831/be-here-360-767x511.jpg 767w, https://www-media.stanford.edu/wp-content/uploads/2018/01/24160831/be-here-360-768x512.jpg 768w, https://www-media.stanford.edu/wp-content/uploads/2018/01/24160831/be-here-360-1023x682.jpg 1023w, https://www-media.stanford.edu/wp-content/uploads/2018/01/24160831/be-here-360-575x383.jpg 575w, https://www-media.stanford.edu/wp-content/uploads/2018/01/24160831/be-here-360-1499x999.jpg 1499w, https://www-media.stanford.edu/wp-content/uploads/2018/01/24160831/be-here-360-600x400.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2018/01/24160831/be-here-360-500x333.jpg 500w" /> <

Show only this issue Error L 395 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/03/11124656/about-stanford-5.jpg 1534w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11124656/about-stanford-5-767x480.jpg 767w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11124656/about-stanford-5-1023x640.jpg 1023w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11124656/about-stanford-5-575x360.jpg 575w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11124656/about-stanford-5-1499x938.jpg 1499w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11124656/about-stanford-5-600x375.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11124656/about-stanford-5-500x313.jpg 500w" /> <

Show only this issue Error L 412 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/05/11150137/about-virtualtour.jpg 1430w, https://www-media.stanford.edu/wp-content/uploads/2017/05/11150137/about-virtualtour-767x480.jpg 767w, https://www-media.stanford.edu/wp-content/uploads/2017/05/11150137/about-virtualtour-1023x640.jpg 1023w, https://www-media.stanford.edu/wp-content/uploads/2017/05/11150137/about-virtualtour-575x359.jpg 575w, https://www-media.stanford.edu/wp-content/uploads/2017/05/11150137/about-virtualtour-600x375.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/05/11150137/about-virtualtour-500x313.jpg 500w" /> <

Show only this issue Error L 429 C 5 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

f]--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/03/11123744/about-stanford-3.jpg 1534w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11123744/about-stanford-3-767x480.jpg 767w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11123744/about-stanford-3-1023x640.jpg 1023w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11123744/about-stanford-3-575x360.jpg 575w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11123744/about-stanford-3-1499x938.jpg 1499w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11123744/about-stanford-3-600x375.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/03/11123744/about-stanford-3-500x313.jpg 500w" /> <

Show only this issue Error L 451 C 7 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

--> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/03/17204726/Stanford_Dish.jpg 2880w, https://www-media.stanford.edu/wp-content/uploads/2017/03/17204726/Stanford_Dish-300x124.jpg 300w, https://www-media.stanford.edu/wp-content/uploads/2017/03/17204726/Stanford_Dish-1024x425.jpg 1024w, https://www-media.stanford.edu/wp-content/uploads/2017/03/17204726/Stanford_Dish-600x249.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/03/17204726/Stanford_Dish-500x207.jpg 500w" media="(orientation: landscape)" /> <so

Show only this issue Error L 452 C 3 When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.

pe)" /> <source srcset="https://www-media.stanford.edu/wp-content/uploads/2017/03/17204747/Stanford_Dish_sm-300x300.jpg 300w, https://www-media.stanford.edu/wp-content/uploads/2017/03/17204747/Stanford_Dish_sm-150x150.jpg 150w, https://www-media.stanford.edu/wp-content/uploads/2017/03/17204747/Stanford_Dish_sm-600x600.jpg 600w, https://www-media.stanford.edu/wp-content/uploads/2017/03/17204747/Stanford_Dish_sm-500x500.jpg 500w, https://www-media.stanford.edu/wp-content/uploads/2017/03/17204747/Stanford_Dish_sm.jpg 800w" media="(orientation: portrait)" /> <

Show only this issue Warning L 23 C 1 The “type” attribute for the “style” element is not needed and should be omitted.

='all' /> <style id='awesome-weather-inline-css' type='text/css'> .awes

Show only this issue Warning L 29 C 1 The “type” attribute is unnecessary for JavaScript resources.

='all' /> <script type='text/javascript' src='https://www.stanford.edu/wp-includes/js/jquery/jquery.js?ver=1.12.4'></scri

Show only this issue Warning L 30 C 1 The “type” attribute is unnecessary for JavaScript resources.

</script> <script type='text/javascript' src='https://www.stanford.edu/wp-includes/js/jquery/jquery-migrate.min.js?ver=1.4.1'></scri

Show only this issue Warning L 115 C 3 The “banner” role is unnecessary for element “header”.

arent"> <header role="banner"> <

Show only this issue Warning L 117 C 5 Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.

t</a> <section id="brand-bar" data-ga-category="Brand bar" data-ga-action="Gateway nav">

Show only this issue Warning L 128 C 5 The “navigation” role is unnecessary for element “nav”.

/div> <nav id="site-navigation" role="navigation" data-ga-category="Top nav">

Show only this issue Warning L 166 C 3 The “main” role is unnecessary for element “main”.

header> <main id="main" role="main"> <