Angular里interpolation text节点的创建逻辑，单步调试

function ɵɵtext(index, value = '') {
    /** @type {?} */
    const lView = getLView();
    /** @type {?} */
    const tView = getTView();
    /** @type {?} */
    const adjustedIndex = index + HEADER_OFFSET;
    ngDevMode &&
        assertEqual(getBindingIndex(), tView.bindingStartIndex, 'text nodes should be created before any bindings');
    ngDevMode && assertDataInRange(lView, adjustedIndex);
    /** @type {?} */
    const tNode = tView.firstCreatePass ?
        getOrCreateTNode(tView, lView[T_HOST], index, 3 /* Element */, null, null) :
        (/** @type {?} */ (tView.data[adjustedIndex]));
    /** @type {?} */
    const textNative = lView[adjustedIndex] = createTextNode(value, lView[RENDERER]);
    appendChild(tView, lView, textNative, tNode);
    // Text nodes are self closing.
    setPreviousOrParentTNode(tNode, false);
}