Method buildInternal

src/custom-element.js:510–606

* Requests or requires the element to be built. The build is done by * invoking BaseElement.buildCallback method. * * Can only be called on a upgraded element. May only be called from * resource.js to ensure an element and its resource are in sync. * * @return {

()

     * @restricted
     */
    buildInternal() {
      assertNotTemplate(this);
      devAssert(this.implClass_, 'Cannot build unupgraded element');
      if (this.buildingPromise_) {
        return this.buildingPromise_;
      }

      this.setReadyStateInternal(ReadyState_Enum.BUILDING);

      // Create the instance.
      const implPromise = this.createImpl_();
      this.getSizer_();

      // Wait for consent.
      const consentPromise = implPromise.then(() => {
        const policyId = this.getConsentPolicy_();
        const purposeConsents = !policyId ? this.getPurposesConsent_() : null;
        if (!policyId && !purposeConsents) {
          return;
        }
        // Must have policyId or granularExp w/ purposeConsents
        return Services.consentPolicyServiceForDocOrNull(this)
          .then((policy) => {
            if (!policy) {
              return true;
            }
            return policyId
              ? policy.whenPolicyUnblock(policyId)
              : policy.whenPurposesUnblock(purposeConsents);
          })
          .then((shouldUnblock) => {
            if (!shouldUnblock) {
              throw blockedByConsentError();
            }
          });
      });

      // Build callback.
      const buildPromise = consentPromise.then(() =>
        devAssert(this.impl_).buildCallback()
      );

      // Build the element.
      return (this.buildingPromise_ = buildPromise.then(
        () => {
          this.built_ = true;
          this.classList.add('i-amphtml-built');
          this.classList.remove('i-amphtml-notbuilt', 'amp-notbuilt');
          this.signals_.signal(CommonSignals_Enum.BUILT);

          if (this.R1()) {
            this.setReadyStateInternal(
              this.readyState_ != ReadyState_Enum.BUILDING
                ? this.readyState_
                : ReadyState_Enum.MOUNTING
            );
          } else {
            this.setReadyStateInternal(ReadyState_Enum.LOADING);