Declarative properties

[snuggs]

Look up CE.attributesChangedCallback & CE.observedAttributes

Expected Behavior

<foo-bar baz=bat>
This is 👉 {baz}
</foo-bar>

<script>
Element `foo-bar`

(class extends HTMLElement {
  set baz () {
    // defaults to returning this.attributes.baz.nodeValue
    // defaults to being added to observedAttributes
  }
})
</script>
</foo-bar>

Current Behavior

Possible Solution

Steps to Reprod(uce)

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Context

Your Environment

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