SAP Spartacus B2B的List页面：
和回车键事件相关的实现：
<cx-table
*ngIf="data.values?.length > 0; else emptyList"
[structure]="structure"
[data]="data.values"
[i18nRoot]="domainType"
[currentItem]="{ property: key, value: currentKey$ | async }"
(launch)="launchItem($event)"
[cxFocus]="{ trap: 'both' }"
>
</cx-table>
调用栈：观察lock-focus.directive.ts里的handleEnter函数是如何被Angular core调用的：
传入focus directive的事件：KeyboardEvent
- code为Enter
- currentTarget: cx-table.vertical
- eventPhase: 3
- key: Enter
- keyCode: 13
类型：keydown
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