packages/mip/src/mip1-polyfill/customElement.js
function () {
    function impl (element) {
      customElement.call(this, element)
    }
    impl.prototype = Object.create(customElement.prototype)
    return impl
  }
function () {
    function impl (element) {
      customElement.call(this, element)
    }
    impl.prototype = Object.create(customElement.prototype)
    return impl
  }
function ( ) { function impl ( element ) { customElement . call ( this , element ) } impl . prototype = Object . create ( customElement . prototype ) return impl }
Create a class of a new type mip element

@return {Function}
Create a class of a new type mip element