File: save_restore_custom_elements_sample.html

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file content (43 lines) | stat: -rw-r--r-- 1,085 bytes parent folder | download | duplicates (14) 
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<script>
  class CEBase extends HTMLElement {
    static formAssociated = true;
    constructor() {
      super();
      this.internals = this.attachInternals();
      this.state_ = undefined;
    }
    formStateRestoreCallback(state, reason) {
      if (reason == "restore") {
        this.state_ = state;
      }
    }
    set(state, value) {
      this.state_ = state;
      this.value_ = value;
      this.internals.setFormValue(value, state);
    }
    get state() {
      return this.state_;
    }
    get value() {
      return this.value_;
    }
  }

  customElements.define("c-e", class extends CEBase {});
</script>
<form>
  <c-e id="custom0"></c-e>
  <c-e id="custom1"></c-e>
  <c-e id="custom2"></c-e>
  <c-e id="custom3"></c-e>
  <c-e id="custom4"></c-e>
  <upgraded-ce id="upgraded0"></upgraded-ce>
  <upgraded-ce id="upgraded1"></upgraded-ce>
  <upgraded-ce id="upgraded2"></upgraded-ce>
  <upgraded-ce id="upgraded3"></upgraded-ce>
  <upgraded-ce id="upgraded4"></upgraded-ce>
</form>
<script>
  customElements.define("upgraded-ce", class extends CEBase {});
</script>