HTML Guide for css
The @container CSS at-rule is a conditional group rule that applies styles to a containment context. The @container at-rule is a recent addition to CSS which isn’t officially a standard rule instead, although widely supported by major browsers.
Check the linked guides to learn more about browser compatibility for this rule.
The value specified for a width attribute in CSS is not valid.
The width CSS property sets an element’s width. There are many allowed values for this attribute, for example:
/* <length> values */
width: 300px;
width: 25em;
/* <percentage> value */
width: 75%;
/* Keyword values */
width: max-content;
width: min-content;
width: fit-content(20em);
width: auto;
/* Global values */
width: inherit;
width: initial;
width: revert;
width: unset;
CSS can’t be properly processed because a computed style is missing a value it depends on.
CSS properties need to be separated by semicolons. Check for the missing semicolon between properties.
In the example below, a forgotten semicolon before the content property makes the CSS parser unable to understand the properties:
<style>
nice {
z-index: auto
content: "";
display: block;
}
</style>
Fix it by including the forgotten semicolon like this:
<style>
nice {
z-index: auto;
content: "";
display: block;
}
</style>
A CSS definition for an X property could not be understood by the parser. Check it to ensure that it’s well formed and that it contains an appropriate value.
The specified CSS property is not valid.
The value specified in a custom CSS property has an unknown or unsupported dimension value.
When specifying a numeric value for a CSS property, remember to always include the units, like 3px or 3em. Only the 0 value can go without units, and instead of 0px you can just use 0.
<td> elements no longer accept an align attribute. This can be achieved using CSS like this:
<td style="text-align:center;">content</td>
The <big> tag is now obsolete. It was used to increase the size of text, you can do that using CSS instead. For example:
<p>Now this is <span style="font-size: larger;">big</span></p>