gistfile1.txt

  onChangeLang(char) {
    if (char.key === '*') return;
    const th_char = 'ๅ/-ภถุึคตจขชๆไำพะัีรนยบลฟหกดเ้่าสวงผปแอิืทมใฝ';
    const en_char = '1234567890-=qwertyuiop[]asdfghjkl;\'zxcvbnm,./';
    if (th_char.match(char.key)) {
      this.Barcode = this.Barcode.substring(0, this.Barcode.length - 1);
      for (let i = 0; i < th_char.length; i++) {
        if (th_char[i] === char.key) {
          this.Barcode += en_char[i];
          return;
        }
      }
    }
  }
/*
 <input type="text" class="form-control" id="Barcode" placeholder="รหัสบาร์โค้ด" name="Barcode"
 [(ngModel)]="Barcode" (keypress)="onChangeLang($event)" (keyup)="onChangeLang($event)">
*/

onChangeLang($event: KeyboardEvent) {
    if ($event.key === '*') { return; }
    const code = $event.code;

    if (code.startsWith('Digit')) {
      ($event.target as any).value += code.split('Digit')[1];
      return false;
    }

    if (code.startsWith('Key')) {
      let char = code.split('Key')[1];

      if (!$event.shiftKey) {
        char = char.toLowerCase();
      }

      ($event.target as any).value += char;
      return false;
    }
  }

nice