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Vue.jsをTypeScriptで使う(Vuetify編)

Last updated at Posted at 2020-05-04

自分用忘備録
逐次追加します

環境

  • Vue 2.6.11
  • Vuetify 2.2.11
  • TypeScript 3.8.3

インストール時

エラー Property 'hello' does not exist on type 'Vue | Element | Vue[] | Element[]'.

型定義をtsconfig.jsonに追加する。

    "types": [
      "webpack-env",
      "vuetify"
    ],

Validation(Vuetify標準)

v-formのバリデーション関連関数

<v-form ref="form">とすると以下の関数が使える。

  • this.$refs.form.validate()
  • this.$refs.form.reset()
  • this.$refs.form.resetValidation()

部分的なバリデーションを行いたい場合はv-formを分けて別名のrefをつけてやればいい。

$refsの型には未定義なので、

パターン1 $refsany型のアクセサを作る(もしくは毎回as any)

get refs(): any {
  // eslint-disable-next-line
  return this.$refs;
}

hoge() {
  this.refs.form.validate();
}

パターン2 interfaceを作ってform用のアクセサを作る

export interface VForm {
  validate: () => boolean;
  reset: () => void;
  resetValidation: () => void;
}

get form(): VForm {
  // eslint-disable-next-line
  return (this.$refs as any).form;
}

hoge() {
  this.form.validate();
}

複数項目の相関チェック

getter (jsだとcomputed相当)で書く。

<v-text-field
  type="password"
  v-model="new_password"
  :counter="20"
  :rules="[rules.required]"
  label="パスワード"
  maxlength="20"
  required
/>
<v-text-field
  type="password"
  v-model="new_password_confirmation"
  :counter="20"
  :rules="[newPasswordConfirmationRule]"
  label="パスワード(再入力)"
  maxlength="20"
  required
/>
@Component
export default class Hoge extends Vue {
//...
  new_password = "";
  new_password_confirmation = "";

  get newPasswordConfirmationRule() {
    return this.new_password == this.new_password_confirmation || "同じパスワードを入力してください"
  }
//***
}
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