Helpscout.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “X-FRAME-OPTIONS” for attribute “http-equiv” on element “meta”.
Bad value “navigation” for attribute “role” on element “header”.
Duplicate ID “nav-dropdown-content”.
Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “Layer_1”.
Duplicate ID “helpscout-logo-desc-1”.
Bad value “///fast.wistia.com/assets/external/E-v1.js” for attribute “src” on element “script”: Unexpected slash or backslash.
Duplicate ID “demo-form”.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The first occurrence of ID “nav-dropdown-content” was here.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The first occurrence of ID “Layer_1” was here.
The first occurrence of ID “helpscout-logo-desc-1” was here.
The first occurrence of ID “demo-form” was here.
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