HTML Guide for bad value
The value used to define the type of a link is not valid. You’re probably using a URL instead of a valid type.
Example of a valid type:
<link rel="icon" type="image/png" href="favicon.png">
XML 1.0 names, typically used for the id attribute of elements, must comply with specific constraints, such as:
- Must start with a letter or underscore _
- Subsequent characters can be letters, digits, hyphens -, underscores _, and periods .
- Cannot contain any spaces or special characters
Here’s an example of an invalid name for an ID:
<svg>
<g id="Group 270">
<!-- Content inside the group element -->
</g>
</svg>
This can be fixed by avoiding whitespace inside the name, like this:
<svg>
<g id="group-270">
<!-- Content inside the group element -->
</g>
</svg>
In this example, the id attribute value Group 270 has been changed to group-270 to follow the rules for XML 1.0 names.
The text-transform CSS property specifies how to capitalize an element’s text. It can be used to make text appear in all-uppercase or all-lowercase, or with each word capitalized.
Examples of valid values for this property are:
text-transform: none;
text-transform: capitalize;
text-transform: uppercase;
text-transform: lowercase;
text-transform: full-width;
text-transform: full-size-kana;