Angular Shadow Root DOM的一些API

一下子就跳到这个函数ɵɵadvance了：

/*** Executes post-order init and check hooks (one of AfterContentInit, AfterContentChecked,* AfterViewInit, AfterViewChecked) given a view where there are pending init hooks to be executed.* @param {?} lView The LView where hooks are defined* @param {?} hooks Hooks to be run* @param {?} initPhase A phase for which hooks should be run* @param {?=} nodeIndex 3 cases depending on the value:* - undefined: all hooks from the array should be executed (post-order case)* - null: execute hooks only from the saved index until the end of the array (pre-order case, when* flushing the remaining hooks)* - number: execute hooks only from the saved index until that node index exclusive (pre-order* case, when executing select(number))* @return {?}*/
function executeInitAndCheckHooks(lView, hooks, initPhase, nodeIndex) {ngDevMode &&assertNotEqual(initPhase, 3 /* InitPhaseCompleted */, 'Init pre-order hooks should not be called more than once');if ((lView[FLAGS] & 3 /* InitPhaseStateMask */) === initPhase) {callHooks(lView, hooks, initPhase, nodeIndex);}
}

这个NzInputGroupComponent来自：nz-input-group

如何判断当前浏览器是否支持ShadowDom：

/*** Checks whether the user's browser support Shadow DOM.* @return {?}*/
function _supportsShadowDom() {if (shadowDomIsSupported == null) {/** @type {?} */const head = typeof document !== 'undefined' ? document.head : null;shadowDomIsSupported = !!(head && (((/** @type {?} */ (head))).createShadowRoot || head.attachShadow));}return shadowDomIsSupported;
}

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