The list of supported HTML and SVG elements is growing quite large, and it's very easy to miss a typo.

This rule checks each type selector to make sure that it is a known HTML or SVG element.

## Noncompliant Code Example

    blabla { /* Noncompliant: 'blabla' is not a known HTML or SVG element */
      color: red;
    }

## Compliant Solution

    span {
      color: red;
    }

## List of Known HTML Elements

Extracted from the HTML Living Standard.

[[allHtmlElements]]

## List of Known SVG Elements

Extracted from the W3C SVG Specifications.

[[allSvgElements]]

## Exceptions

- Type selectors starting with `md-` are considered as AngularJS Materials type selectors and do not raise any issue.
- Custom type selectors can also be excluded through the `Exclusions` parameter.

## stylelint Related Rules

- selector-type-no-unknown