検証

ブラウザのデフォルトの動作またはカスタムスタイルとJavaScriptを介して、HTML5フォーム検証を使用して、ユーザーに価値のある、実用的なフィードバックを提供します。

ネイティブHTML5フォーム検証

ネイティブHTMLフォーム検証（サポートされているすべてのブラウザで使用可能）では、`:valid` および `:invalid` 疑似セレクターを使用して、検証スタイルを適用し、フィードバックメッセージを表示します。

Bootstrapは、`:valid` および `:invalid` スタイルのスコープを親の `.was-validated` クラスに設定します。これは通常、`<Form>` に適用されます（`validated` propをショートカットとして使用できます）。そうしないと、値のない必須フィールドは、ページの読み込み時に無効として表示されます。この方法では、それらをいつアクティブにするかを選択できます（通常はフォームの送信が試行された後）。

注意！

ブラウザは、デフォルトで `form` に独自の検証UIを提供します。 `<Form>` または `<form>` 要素にHTML `noValidate` 属性を追加することで、デフォルトのUIを無効にできます。

結果

読み込み中...

ライブエディター

import { useState } from 'react';
import Button from 'react-bootstrap/Button';
import Col from 'react-bootstrap/Col';
import Form from 'react-bootstrap/Form';
import InputGroup from 'react-bootstrap/InputGroup';
import Row from 'react-bootstrap/Row';

function FormExample() {
  const [validated, setValidated] = useState(false);

  const handleSubmit = (event) => {
    const form = event.currentTarget;
    if (form.checkValidity() === false) {
      event.preventDefault();
      event.stopPropagation();
    }

    setValidated(true);
  };

  return (
    <Form noValidate validated={validated} onSubmit={handleSubmit}>
      <Row className="mb-3">
        <Form.Group as={Col} md="4" controlId="validationCustom01">
          <Form.Label>First name</Form.Label>
          <Form.Control
            required
            type="text"
            placeholder="First name"
            defaultValue="Mark"
          />
          <Form.Control.Feedback>Looks good!</Form.Control.Feedback>
        </Form.Group>
        <Form.Group as={Col} md="4" controlId="validationCustom02">
          <Form.Label>Last name</Form.Label>
          <Form.Control
            required
            type="text"
            placeholder="Last name"
            defaultValue="Otto"
          />
          <Form.Control.Feedback>Looks good!</Form.Control.Feedback>
        </Form.Group>
        <Form.Group as={Col} md="4" controlId="validationCustomUsername">
          <Form.Label>Username</Form.Label>
          <InputGroup hasValidation>
            <InputGroup.Text id="inputGroupPrepend">@</InputGroup.Text>
            <Form.Control
              type="text"
              placeholder="Username"
              aria-describedby="inputGroupPrepend"
              required
            />
            <Form.Control.Feedback type="invalid">
              Please choose a username.
            </Form.Control.Feedback>
          </InputGroup>
        </Form.Group>
      </Row>
      <Row className="mb-3">
        <Form.Group as={Col} md="6" controlId="validationCustom03">
          <Form.Label>City</Form.Label>
          <Form.Control type="text" placeholder="City" required />
          <Form.Control.Feedback type="invalid">
            Please provide a valid city.
          </Form.Control.Feedback>
        </Form.Group>
        <Form.Group as={Col} md="3" controlId="validationCustom04">
          <Form.Label>State</Form.Label>
          <Form.Control type="text" placeholder="State" required />
          <Form.Control.Feedback type="invalid">
            Please provide a valid state.
          </Form.Control.Feedback>
        </Form.Group>
        <Form.Group as={Col} md="3" controlId="validationCustom05">
          <Form.Label>Zip</Form.Label>
          <Form.Control type="text" placeholder="Zip" required />
          <Form.Control.Feedback type="invalid">
            Please provide a valid zip.
          </Form.Control.Feedback>
        </Form.Group>
      </Row>
      <Form.Group className="mb-3">
        <Form.Check
          required
          label="Agree to terms and conditions"
          feedback="You must agree before submitting."
          feedbackType="invalid"
        />
      </Form.Group>
      <Button type="submit">Submit form</Button>
    </Form>
  );
}

export default FormExample;

import { useState } from 'react';
import Button from 'react-bootstrap/Button';
import Col from 'react-bootstrap/Col';
import Form from 'react-bootstrap/Form';
import InputGroup from 'react-bootstrap/InputGroup';
import Row from 'react-bootstrap/Row';

function FormExample() {
  const [validated, setValidated] = useState(false);

  const handleSubmit = (event) => {
    const form = event.currentTarget;
    if (form.checkValidity() === false) {
      event.preventDefault();
      event.stopPropagation();
    }

    setValidated(true);
  };

  return (
    <Form noValidate validated={validated} onSubmit={handleSubmit}>
      <Row className="mb-3">
        <Form.Group as={Col} md="4" controlId="validationCustom01">
          <Form.Label>First name</Form.Label>
          <Form.Control
            required
            type="text"
            placeholder="First name"
            defaultValue="Mark"
          />
          <Form.Control.Feedback>Looks good!</Form.Control.Feedback>
        </Form.Group>
        <Form.Group as={Col} md="4" controlId="validationCustom02">
          <Form.Label>Last name</Form.Label>
          <Form.Control
            required
            type="text"
            placeholder="Last name"
            defaultValue="Otto"
          />
          <Form.Control.Feedback>Looks good!</Form.Control.Feedback>
        </Form.Group>
        <Form.Group as={Col} md="4" controlId="validationCustomUsername">
          <Form.Label>Username</Form.Label>
          <InputGroup hasValidation>
            <InputGroup.Text id="inputGroupPrepend">@</InputGroup.Text>
            <Form.Control
              type="text"
              placeholder="Username"
              aria-describedby="inputGroupPrepend"
              required
            />
            <Form.Control.Feedback type="invalid">
              Please choose a username.
            </Form.Control.Feedback>
          </InputGroup>
        </Form.Group>
      </Row>
      <Row className="mb-3">
        <Form.Group as={Col} md="6" controlId="validationCustom03">
          <Form.Label>City</Form.Label>
          <Form.Control type="text" placeholder="City" required />
          <Form.Control.Feedback type="invalid">
            Please provide a valid city.
          </Form.Control.Feedback>
        </Form.Group>
        <Form.Group as={Col} md="3" controlId="validationCustom04">
          <Form.Label>State</Form.Label>
          <Form.Control type="text" placeholder="State" required />
          <Form.Control.Feedback type="invalid">
            Please provide a valid state.
          </Form.Control.Feedback>
        </Form.Group>
        <Form.Group as={Col} md="3" controlId="validationCustom05">
          <Form.Label>Zip</Form.Label>
          <Form.Control type="text" placeholder="Zip" required />
          <Form.Control.Feedback type="invalid">
            Please provide a valid zip.
          </Form.Control.Feedback>
        </Form.Group>
      </Row>
      <Form.Group className="mb-3">
        <Form.Check
          required
          label="Agree to terms and conditions"
          feedback="You must agree before submitting."
          feedbackType="invalid"
        />
      </Form.Group>
      <Button type="submit">Submit form</Button>
    </Form>
  );
}

export default FormExample;

フォームライブラリとサーバーレンダリングされたスタイル

Formikやreact-formalなどのライブラリを介してフォーム検証を処理すると便利なことがよくあります（特にReactの場合）。そのような場合、`isValid` および `isInvalid` propをフォームコントロールに追加して、検証スタイルを手動で適用できます。以下は、Formikと統合した簡単な例です。

結果

読み込み中...

ライブエディター

import Button from 'react-bootstrap/Button';
import Col from 'react-bootstrap/Col';
import Form from 'react-bootstrap/Form';
import InputGroup from 'react-bootstrap/InputGroup';
import Row from 'react-bootstrap/Row';
import * as formik from 'formik';
import * as yup from 'yup';

function FormExample() {
  const { Formik } = formik;

  const schema = yup.object().shape({
    firstName: yup.string().required(),
    lastName: yup.string().required(),
    username: yup.string().required(),
    city: yup.string().required(),
    state: yup.string().required(),
    zip: yup.string().required(),
    terms: yup.bool().required().oneOf([true], 'Terms must be accepted'),
  });

  return (
    <Formik
      validationSchema={schema}
      onSubmit={console.log}
      initialValues={{
        firstName: 'Mark',
        lastName: 'Otto',
        username: '',
        city: '',
        state: '',
        zip: '',
        terms: false,
      }}
    >
      {({ handleSubmit, handleChange, values, touched, errors }) => (
        <Form noValidate onSubmit={handleSubmit}>
          <Row className="mb-3">
            <Form.Group as={Col} md="4" controlId="validationFormik01">
              <Form.Label>First name</Form.Label>
              <Form.Control
                type="text"
                name="firstName"
                value={values.firstName}
                onChange={handleChange}
                isValid={touched.firstName && !errors.firstName}
              />
              <Form.Control.Feedback>Looks good!</Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="4" controlId="validationFormik02">
              <Form.Label>Last name</Form.Label>
              <Form.Control
                type="text"
                name="lastName"
                value={values.lastName}
                onChange={handleChange}
                isValid={touched.lastName && !errors.lastName}
              />

              <Form.Control.Feedback>Looks good!</Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="4" controlId="validationFormikUsername">
              <Form.Label>Username</Form.Label>
              <InputGroup hasValidation>
                <InputGroup.Text id="inputGroupPrepend">@</InputGroup.Text>
                <Form.Control
                  type="text"
                  placeholder="Username"
                  aria-describedby="inputGroupPrepend"
                  name="username"
                  value={values.username}
                  onChange={handleChange}
                  isInvalid={!!errors.username}
                />
                <Form.Control.Feedback type="invalid">
                  {errors.username}
                </Form.Control.Feedback>
              </InputGroup>
            </Form.Group>
          </Row>
          <Row className="mb-3">
            <Form.Group as={Col} md="6" controlId="validationFormik03">
              <Form.Label>City</Form.Label>
              <Form.Control
                type="text"
                placeholder="City"
                name="city"
                value={values.city}
                onChange={handleChange}
                isInvalid={!!errors.city}
              />

              <Form.Control.Feedback type="invalid">
                {errors.city}
              </Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="3" controlId="validationFormik04">
              <Form.Label>State</Form.Label>
              <Form.Control
                type="text"
                placeholder="State"
                name="state"
                value={values.state}
                onChange={handleChange}
                isInvalid={!!errors.state}
              />
              <Form.Control.Feedback type="invalid">
                {errors.state}
              </Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="3" controlId="validationFormik05">
              <Form.Label>Zip</Form.Label>
              <Form.Control
                type="text"
                placeholder="Zip"
                name="zip"
                value={values.zip}
                onChange={handleChange}
                isInvalid={!!errors.zip}
              />

              <Form.Control.Feedback type="invalid">
                {errors.zip}
              </Form.Control.Feedback>
            </Form.Group>
          </Row>
          <Form.Group className="mb-3">
            <Form.Check
              required
              name="terms"
              label="Agree to terms and conditions"
              onChange={handleChange}
              isInvalid={!!errors.terms}
              feedback={errors.terms}
              feedbackType="invalid"
              id="validationFormik0"
            />
          </Form.Group>
          <Button type="submit">Submit form</Button>
        </Form>
      )}
    </Formik>
  );
}

export default FormExample;

import Button from 'react-bootstrap/Button';
import Col from 'react-bootstrap/Col';
import Form from 'react-bootstrap/Form';
import InputGroup from 'react-bootstrap/InputGroup';
import Row from 'react-bootstrap/Row';
import * as formik from 'formik';
import * as yup from 'yup';

function FormExample() {
  const { Formik } = formik;

  const schema = yup.object().shape({
    firstName: yup.string().required(),
    lastName: yup.string().required(),
    username: yup.string().required(),
    city: yup.string().required(),
    state: yup.string().required(),
    zip: yup.string().required(),
    terms: yup.bool().required().oneOf([true], 'Terms must be accepted'),
  });

  return (
    <Formik
      validationSchema={schema}
      onSubmit={console.log}
      initialValues={{
        firstName: 'Mark',
        lastName: 'Otto',
        username: '',
        city: '',
        state: '',
        zip: '',
        terms: false,
      }}
    >
      {({ handleSubmit, handleChange, values, touched, errors }) => (
        <Form noValidate onSubmit={handleSubmit}>
          <Row className="mb-3">
            <Form.Group as={Col} md="4" controlId="validationFormik01">
              <Form.Label>First name</Form.Label>
              <Form.Control
                type="text"
                name="firstName"
                value={values.firstName}
                onChange={handleChange}
                isValid={touched.firstName && !errors.firstName}
              />
              <Form.Control.Feedback>Looks good!</Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="4" controlId="validationFormik02">
              <Form.Label>Last name</Form.Label>
              <Form.Control
                type="text"
                name="lastName"
                value={values.lastName}
                onChange={handleChange}
                isValid={touched.lastName && !errors.lastName}
              />

              <Form.Control.Feedback>Looks good!</Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="4" controlId="validationFormikUsername">
              <Form.Label>Username</Form.Label>
              <InputGroup hasValidation>
                <InputGroup.Text id="inputGroupPrepend">@</InputGroup.Text>
                <Form.Control
                  type="text"
                  placeholder="Username"
                  aria-describedby="inputGroupPrepend"
                  name="username"
                  value={values.username}
                  onChange={handleChange}
                  isInvalid={!!errors.username}
                />
                <Form.Control.Feedback type="invalid">
                  {errors.username}
                </Form.Control.Feedback>
              </InputGroup>
            </Form.Group>
          </Row>
          <Row className="mb-3">
            <Form.Group as={Col} md="6" controlId="validationFormik03">
              <Form.Label>City</Form.Label>
              <Form.Control
                type="text"
                placeholder="City"
                name="city"
                value={values.city}
                onChange={handleChange}
                isInvalid={!!errors.city}
              />

              <Form.Control.Feedback type="invalid">
                {errors.city}
              </Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="3" controlId="validationFormik04">
              <Form.Label>State</Form.Label>
              <Form.Control
                type="text"
                placeholder="State"
                name="state"
                value={values.state}
                onChange={handleChange}
                isInvalid={!!errors.state}
              />
              <Form.Control.Feedback type="invalid">
                {errors.state}
              </Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="3" controlId="validationFormik05">
              <Form.Label>Zip</Form.Label>
              <Form.Control
                type="text"
                placeholder="Zip"
                name="zip"
                value={values.zip}
                onChange={handleChange}
                isInvalid={!!errors.zip}
              />

              <Form.Control.Feedback type="invalid">
                {errors.zip}
              </Form.Control.Feedback>
            </Form.Group>
          </Row>
          <Form.Group className="mb-3">
            <Form.Check
              required
              name="terms"
              label="Agree to terms and conditions"
              onChange={handleChange}
              isInvalid={!!errors.terms}
              feedback={errors.terms}
              feedbackType="invalid"
              id="validationFormik0"
            />
          </Form.Group>
          <Button type="submit">Submit form</Button>
        </Form>
      )}
    </Formik>
  );
}

export default FormExample;

ツールチップ

フォームのレイアウトで許可されている場合は、`tooltip` propを使用して、スタイル付きのツールチップに検証フィードバックを表示できます。ツールチップの位置決めには、`position: relative` が設定された親があることを確認してください。以下の例では、列クラスにはすでにこれがありますが、プロジェクトによっては別の設定が必要になる場合があります。

結果

読み込み中...

ライブエディター

import Button from 'react-bootstrap/Button';
import Col from 'react-bootstrap/Col';
import Form from 'react-bootstrap/Form';
import InputGroup from 'react-bootstrap/InputGroup';
import Row from 'react-bootstrap/Row';
import * as formik from 'formik';
import * as yup from 'yup';

function FormExample() {
  const { Formik } = formik;

  const schema = yup.object().shape({
    firstName: yup.string().required(),
    lastName: yup.string().required(),
    username: yup.string().required(),
    city: yup.string().required(),
    state: yup.string().required(),
    zip: yup.string().required(),
    file: yup.mixed().required(),
    terms: yup.bool().required().oneOf([true], 'terms must be accepted'),
  });

  return (
    <Formik
      validationSchema={schema}
      onSubmit={console.log}
      initialValues={{
        firstName: 'Mark',
        lastName: 'Otto',
        username: '',
        city: '',
        state: '',
        zip: '',
        file: null,
        terms: false,
      }}
    >
      {({ handleSubmit, handleChange, values, touched, errors }) => (
        <Form noValidate onSubmit={handleSubmit}>
          <Row className="mb-3">
            <Form.Group
              as={Col}
              md="4"
              controlId="validationFormik101"
              className="position-relative"
            >
              <Form.Label>First name</Form.Label>
              <Form.Control
                type="text"
                name="firstName"
                value={values.firstName}
                onChange={handleChange}
                isValid={touched.firstName && !errors.firstName}
              />
              <Form.Control.Feedback tooltip>Looks good!</Form.Control.Feedback>
            </Form.Group>
            <Form.Group
              as={Col}
              md="4"
              controlId="validationFormik102"
              className="position-relative"
            >
              <Form.Label>Last name</Form.Label>
              <Form.Control
                type="text"
                name="lastName"
                value={values.lastName}
                onChange={handleChange}
                isValid={touched.lastName && !errors.lastName}
              />

              <Form.Control.Feedback tooltip>Looks good!</Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="4" controlId="validationFormikUsername2">
              <Form.Label>Username</Form.Label>
              <InputGroup hasValidation>
                <InputGroup.Text id="inputGroupPrepend">@</InputGroup.Text>
                <Form.Control
                  type="text"
                  placeholder="Username"
                  aria-describedby="inputGroupPrepend"
                  name="username"
                  value={values.username}
                  onChange={handleChange}
                  isInvalid={!!errors.username}
                />
                <Form.Control.Feedback type="invalid" tooltip>
                  {errors.username}
                </Form.Control.Feedback>
              </InputGroup>
            </Form.Group>
          </Row>
          <Row className="mb-3">
            <Form.Group
              as={Col}
              md="6"
              controlId="validationFormik103"
              className="position-relative"
            >
              <Form.Label>City</Form.Label>
              <Form.Control
                type="text"
                placeholder="City"
                name="city"
                value={values.city}
                onChange={handleChange}
                isInvalid={!!errors.city}
              />

              <Form.Control.Feedback type="invalid" tooltip>
                {errors.city}
              </Form.Control.Feedback>
            </Form.Group>
            <Form.Group
              as={Col}
              md="3"
              controlId="validationFormik104"
              className="position-relative"
            >
              <Form.Label>State</Form.Label>
              <Form.Control
                type="text"
                placeholder="State"
                name="state"
                value={values.state}
                onChange={handleChange}
                isInvalid={!!errors.state}
              />
              <Form.Control.Feedback type="invalid" tooltip>
                {errors.state}
              </Form.Control.Feedback>
            </Form.Group>
            <Form.Group
              as={Col}
              md="3"
              controlId="validationFormik105"
              className="position-relative"
            >
              <Form.Label>Zip</Form.Label>
              <Form.Control
                type="text"
                placeholder="Zip"
                name="zip"
                value={values.zip}
                onChange={handleChange}
                isInvalid={!!errors.zip}
              />

              <Form.Control.Feedback type="invalid" tooltip>
                {errors.zip}
              </Form.Control.Feedback>
            </Form.Group>
          </Row>
          <Form.Group className="position-relative mb-3">
            <Form.Label>File</Form.Label>
            <Form.Control
              type="file"
              required
              name="file"
              onChange={handleChange}
              isInvalid={!!errors.file}
            />
            <Form.Control.Feedback type="invalid" tooltip>
              {errors.file}
            </Form.Control.Feedback>
          </Form.Group>
          <Form.Group className="position-relative mb-3">
            <Form.Check
              required
              name="terms"
              label="Agree to terms and conditions"
              onChange={handleChange}
              isInvalid={!!errors.terms}
              feedback={errors.terms}
              feedbackType="invalid"
              id="validationFormik106"
              feedbackTooltip
            />
          </Form.Group>
          <Button type="submit">Submit form</Button>
        </Form>
      )}
    </Formik>
  );
}

export default FormExample;

import Button from 'react-bootstrap/Button';
import Col from 'react-bootstrap/Col';
import Form from 'react-bootstrap/Form';
import InputGroup from 'react-bootstrap/InputGroup';
import Row from 'react-bootstrap/Row';
import * as formik from 'formik';
import * as yup from 'yup';

function FormExample() {
  const { Formik } = formik;

  const schema = yup.object().shape({
    firstName: yup.string().required(),
    lastName: yup.string().required(),
    username: yup.string().required(),
    city: yup.string().required(),
    state: yup.string().required(),
    zip: yup.string().required(),
    file: yup.mixed().required(),
    terms: yup.bool().required().oneOf([true], 'terms must be accepted'),
  });

  return (
    <Formik
      validationSchema={schema}
      onSubmit={console.log}
      initialValues={{
        firstName: 'Mark',
        lastName: 'Otto',
        username: '',
        city: '',
        state: '',
        zip: '',
        file: null,
        terms: false,
      }}
    >
      {({ handleSubmit, handleChange, values, touched, errors }) => (
        <Form noValidate onSubmit={handleSubmit}>
          <Row className="mb-3">
            <Form.Group
              as={Col}
              md="4"
              controlId="validationFormik101"
              className="position-relative"
            >
              <Form.Label>First name</Form.Label>
              <Form.Control
                type="text"
                name="firstName"
                value={values.firstName}
                onChange={handleChange}
                isValid={touched.firstName && !errors.firstName}
              />
              <Form.Control.Feedback tooltip>Looks good!</Form.Control.Feedback>
            </Form.Group>
            <Form.Group
              as={Col}
              md="4"
              controlId="validationFormik102"
              className="position-relative"
            >
              <Form.Label>Last name</Form.Label>
              <Form.Control
                type="text"
                name="lastName"
                value={values.lastName}
                onChange={handleChange}
                isValid={touched.lastName && !errors.lastName}
              />

              <Form.Control.Feedback tooltip>Looks good!</Form.Control.Feedback>
            </Form.Group>
            <Form.Group as={Col} md="4" controlId="validationFormikUsername2">
              <Form.Label>Username</Form.Label>
              <InputGroup hasValidation>
                <InputGroup.Text id="inputGroupPrepend">@</InputGroup.Text>
                <Form.Control
                  type="text"
                  placeholder="Username"
                  aria-describedby="inputGroupPrepend"
                  name="username"
                  value={values.username}
                  onChange={handleChange}
                  isInvalid={!!errors.username}
                />
                <Form.Control.Feedback type="invalid" tooltip>
                  {errors.username}
                </Form.Control.Feedback>
              </InputGroup>
            </Form.Group>
          </Row>
          <Row className="mb-3">
            <Form.Group
              as={Col}
              md="6"
              controlId="validationFormik103"
              className="position-relative"
            >
              <Form.Label>City</Form.Label>
              <Form.Control
                type="text"
                placeholder="City"
                name="city"
                value={values.city}
                onChange={handleChange}
                isInvalid={!!errors.city}
              />

              <Form.Control.Feedback type="invalid" tooltip>
                {errors.city}
              </Form.Control.Feedback>
            </Form.Group>
            <Form.Group
              as={Col}
              md="3"
              controlId="validationFormik104"
              className="position-relative"
            >
              <Form.Label>State</Form.Label>
              <Form.Control
                type="text"
                placeholder="State"
                name="state"
                value={values.state}
                onChange={handleChange}
                isInvalid={!!errors.state}
              />
              <Form.Control.Feedback type="invalid" tooltip>
                {errors.state}
              </Form.Control.Feedback>
            </Form.Group>
            <Form.Group
              as={Col}
              md="3"
              controlId="validationFormik105"
              className="position-relative"
            >
              <Form.Label>Zip</Form.Label>
              <Form.Control
                type="text"
                placeholder="Zip"
                name="zip"
                value={values.zip}
                onChange={handleChange}
                isInvalid={!!errors.zip}
              />

              <Form.Control.Feedback type="invalid" tooltip>
                {errors.zip}
              </Form.Control.Feedback>
            </Form.Group>
          </Row>
          <Form.Group className="position-relative mb-3">
            <Form.Label>File</Form.Label>
            <Form.Control
              type="file"
              required
              name="file"
              onChange={handleChange}
              isInvalid={!!errors.file}
            />
            <Form.Control.Feedback type="invalid" tooltip>
              {errors.file}
            </Form.Control.Feedback>
          </Form.Group>
          <Form.Group className="position-relative mb-3">
            <Form.Check
              required
              name="terms"
              label="Agree to terms and conditions"
              onChange={handleChange}
              isInvalid={!!errors.terms}
              feedback={errors.terms}
              feedbackType="invalid"
              id="validationFormik106"
              feedbackTooltip
            />
          </Form.Group>
          <Button type="submit">Submit form</Button>
        </Form>
      )}
    </Formik>
  );
}

export default FormExample;

入力グループの検証

検証付きの `<InputGroup>` で角を丸く正しく表示するには、`<InputGroup>` に `hasValidation` propが必要です。

結果

読み込み中...

ライブエディター

import Form from 'react-bootstrap/Form';
import InputGroup from 'react-bootstrap/InputGroup';

function ValidationInputGroupExample() {
  return (
    <InputGroup hasValidation>
      <InputGroup.Text>@</InputGroup.Text>
      <Form.Control type="text" required isInvalid />
      <Form.Control.Feedback type="invalid">
        Please choose a username.
      </Form.Control.Feedback>
    </InputGroup>
  );
}

export default ValidationInputGroupExample;

import Form from 'react-bootstrap/Form';
import InputGroup from 'react-bootstrap/InputGroup';

function ValidationInputGroupExample() {
  return (
    <InputGroup hasValidation>
      <InputGroup.Text>@</InputGroup.Text>
      <Form.Control type="text" required isInvalid />
      <Form.Control.Feedback type="invalid">
        Please choose a username.
      </Form.Control.Feedback>
    </InputGroup>
  );
}

export default ValidationInputGroupExample;

ネイティブHTML5フォーム検証​

フォームライブラリとサーバーレンダリングされたスタイル​

ツールチップ​

入力グループの検証​

API​

フィードバック​

ネイティブHTML5フォーム検証

フォームライブラリとサーバーレンダリングされたスタイル

ツールチップ

入力グループの検証

API

フィードバック