Method selectAlternateOrChangeProjection

src/layer.js:409–437

()

  }

  selectAlternateOrChangeProjection() {
    let mapml = this.src ? this.shadowRoot : this;
    let selectedAlternate =
      this.getProjection() !== this.parentElement.projection &&
      mapml.querySelector(
        'map-link[rel=alternate][projection=' +
          this.parentElement.projection +
          '][href]'
      );

    if (selectedAlternate) {
      let url = new URL(
        selectedAlternate.getAttribute('href'),
        selectedAlternate.getBase()
      ).href;
      throw new Error('changeprojection', {
        cause: { href: url }
      });
    }
    let contentProjection = this.getProjection();
    if (
      contentProjection !== this.parentElement.projection &&
      this.parentElement.layers.length === 1
    ) {
      throw new Error('changeprojection', {
        cause: { mapprojection: contentProjection }
      });
    }
  }

  copyRemoteContentToShadowRoot(mapml) {
    let shadowRoot = this.shadowRoot;