Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “type” attribute is unnecessary for JavaScript resources.
The first occurrence of ID “gridSystemModalLabel” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “container_box” 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).
This document appears to be written in Italian. Consider adding “lang="it"” (or variant) to the “html” start tag.
Errors:
Bad value “true” for attribute “async” on element “script”.
Attribute “linkandroid” not allowed on element “button” at this point.
Attribute “linkapple” not allowed on element “button” at this point.
Attribute “msg” not allowed on element “span” at this point.
Attribute “tiporicerca” not allowed on element “input” at this point.
Attribute “labelzone” not allowed on element “input” at this point.
Attribute “autocorrect” not allowed on element “input” at this point.
Element “pre” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “gridSystemModalLabel”.
Attribute “row” not allowed on element “textarea” at this point.
Bad value “auto” for attribute “width” on element “img”: Expected a digit but saw “a” instead.
Duplicate ID “container_box”.
The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.
Italy IT