htmlsnob/showcase.html at master · mollerhoj/htmlsnob · GitHub

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<html> -- Missing required attributes: lang
  <body>
    <p ="my-class">Hello World</p> -- Attribute name missing, expected a name before the = sign
    <p Class="my-class">Hello World</p> -- Attribute name `Class` should be in kebab-case, change to `class`
    <canvas xyz></canvas> -- `xyz` not allowed, must be a global attribute or: `height, width`
    <p class="myClass">Hello World</p> -- Attribute value `myClass` should be in kebab-case, change to `my-class`
    <p class='my-class'>Hello World</p> -- Attribute value must be quoted with ""
    <button type="clickable"></button> -- Attribute value `clickable` must be one of `submit, reset, button`
    <p id="my-id" class="my-class">Hello World</p> -- Attribute `class` must be before `id`
    <input checked="true" /> -- Boolean Attribute must have no value `checked`
    <p class="my-class" class="another-class">Hello World</p> -- Attribute "class" appears more than once
    <p class="flex-row flex">Hello World</p> -- `flex` must be before `flex-row`
    <p id="SomeId">Hello World</p> -- Attribute value `SomeId` should be in kebab-case, change to `some-id`
    <p id="a">Hello World</p><span id="a"></span> -- id value `a` is used more than once
    <ul>Hello World<li></li></ul> -- `ul` tags must not contain text content
    <p>  </p> -- `p` tags must contain text
    <homemade> </homemade> -- Tag `homemade` is not allowed
    <1-p></1-p> -- Tag name `1-p` must match the regexp `^[A-Za-z][A-Za-z0-9.-]*$`
    <P></P> -- Tag name "P" should be in lowercase, change to "p"
    <footer><header>Hello World</header></footer> -- `header` not allowed within `footer`
    <address><span><h1>Hello World</h1></span></address> -- `h1` not allowed within `address`
    <abbr><a><address>Hello</address></a></abbr> -- `address` is not allowed within `abbr`

  </body>
</html>