Method applyUpdatesToElement_

extensions/amp-bind/0.1/bind-impl.js:1219–1266

* Applies expression results to a single BoundElementDef. * @param {!Element} element * @param {!Array<{boundProperty: !BoundPropertyDef, newValue: BindExpressionResultDef}>} updates * @return {!Promise}

(element, updates)

   * @return {!Promise}
   */
  applyUpdatesToElement_(element, updates) {
    if (updates.length === 0) {
      return Promise.resolve();
    }
    return this.mutator_.mutateElement(element, () => {
      const mutations = map();
      let width, height;

      updates.forEach((update) => {
        const {boundProperty, newValue} = update;
        const {property} = boundProperty;
        const mutation = this.applyBinding_(boundProperty, element, newValue);

        if (mutation) {
          mutations[mutation.name] = mutation.value;
          if (property == 'width') {
            width = isFiniteNumber(newValue) ? Number(newValue) : width;
          } else if (property == 'height') {
            height = isFiniteNumber(newValue) ? Number(newValue) : height;
          }
        }

        this.dispatchFormValueChangeEventIfNecessary_(element, property);
      });

      if (width !== undefined || height !== undefined) {
        // request without scheduling vsync pass since `mutateElement()`
        // will schedule a pass after a short delay anyways.
        this.mutator_.forceChangeSize(element, height, width);
      }

      if (typeof element.mutatedAttributesCallback === 'function') {
        // Prevent an exception in the callback from interrupting execution,
        // instead wrap in user error and give a helpful message.
        try {
          element.mutatedAttributesCallback(mutations);
        } catch (e) {
          const error = user().createError(
            '%s: Applying expression results (%s) failed with error,',
            TAG,
            JSON.stringify(mutations),
            e
          );
          this.reportError_(error, element);
        }
      }
    });
  }

  /**
   * Dispatches an `AmpEvents_Enum.FORM_VALUE_CHANGE` if the element's changed