Function setUpAttributes

packages/core/src/render3/util/attrs_utils.ts:42–80

(renderer: Renderer, native: RElement, attrs: TAttributes)

 * @returns the index value that was last accessed in the attributes array
 */
export function setUpAttributes(renderer: Renderer, native: RElement, attrs: TAttributes): number {
  let i = 0;
  while (i < attrs.length) {
    const value = attrs[i];
    if (typeof value === 'number') {
      // only namespaces are supported. Other value types (such as style/class
      // entries) are not supported in this function.
      if (value !== AttributeMarker.NamespaceURI) {
        break;
      }

      // we just landed on the marker value ... therefore
      // we should skip to the next entry
      i++;

      const namespaceURI = attrs[i++] as string;
      const attrName = attrs[i++] as string;
      const attrVal = attrs[i++] as string;
      renderer.setAttribute(native, attrName, attrVal, namespaceURI);
    } else {
      // attrName is string;
      const attrName = value as string;
      const attrVal = attrs[++i];
      // Standard attributes
      if (isAnimationProp(attrName)) {
        renderer.setProperty(native, attrName, attrVal);
      } else {
        renderer.setAttribute(native, attrName, attrVal as string);
      }
      i++;
    }
  }

  // another piece of code may iterate over the same attributes array. Therefore
  // it may be helpful to return the exact spot where the attributes array exited
  // whether by running into an unsupported marker or if all the static values were
  // iterated over.
  return i;
}

/**
 * Test whether the given value is a marker that indicates that the following