html页面里有一个input element，通过语法[(ngModel)]双向绑定到model hero的name字段。
一旦往input field里输入新的值之后，触发core.js的refreshView方法，里面执行templateFn方法：
hero-detail.component.html对应一个方法：HeroDetailComponent_div_2_Template:
上图的方法负责更新element的property：
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
/**
* Update a property on a selected element.
*
* Operates on the element selected by index via the {@link select} instruction.
*
* If the property name also exists as an input property on one of the element's directives,
* the component property will be set instead of the element property. This check must
* be conducted at runtime so child components that add new `@Inputs` don't have to be re-compiled
*
* @param propName Name of property. Because it is going to DOM, this is not subject to
* renaming as part of minification.
* @param value New value to write.
* @param sanitizer An optional function used to sanitize the value.
* @returns This function returns itself so that it may be chained
* (e.g. `property('name', ctx.name)('title', ctx.title)`)
*
* @codeGenApi
*/
el是html的原生element，即input field：
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