Angular failed to bind the data of the main component to the data of the child component

failed to bind the data of the main component to the data of the child component

related codes

compiler.js:2547 Uncaught Error: Template parse errors:
Can"t bind to "readed" since it isn"t a known property of "app-readme".
Feb.24,2022

Don't you use Input to bind data to subcomponents?

// 
export class AppComponent {
  title = "MBTI-16";
  isRead:boolean = false;
  gameStart:boolean = false;
}
// 
export class ReadmeComponent implements OnInit {
  readMeClass:string = "";  
  @Input() readed:boolean;

  constructor() { }

  ngOnInit() {
  }
}
The problem with

is that the component does not introduce the @ Input module and does not add @ Input to the mapped attributes. The problem is that the component does not introduce the @ Input module and does not add @ Input

to the mapped attributes.
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b30a91-2bd5d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b30a91-2bd5d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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