custom-select

bootstrap5.css

.was-validated .custom-select:valid:focus,
.custom-select.is-valid:focus {
  border-color: #28a745;
  box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
}

bootstrap5.css

.was-validated .custom-select:valid ~ .valid-feedback,
.was-validated .custom-select:valid ~ .valid-tooltip,
.custom-select.is-valid ~ .valid-feedback,
.custom-select.is-valid ~ .valid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .custom-control-input:valid ~ .custom-control-label,
.custom-control-input.is-valid ~ .custom-control-label {
  color: #28a745;
}

bootstrap5.css

.was-validated .custom-control-input:valid ~ .custom-control-label::before,
.custom-control-input.is-valid ~ .custom-control-label::before {
  border-color: #28a745;
}

bootstrap5.css

.was-validated .custom-control-input:valid ~ .valid-feedback,
.was-validated .custom-control-input:valid ~ .valid-tooltip,
.custom-control-input.is-valid ~ .valid-feedback,
.custom-control-input.is-valid ~ .valid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .custom-control-input:valid:checked ~ .custom-control-label::before,
.custom-control-input.is-valid:checked ~ .custom-control-label::before {
  border-color: #34ce57;
  background-color: #34ce57;
}

bootstrap5.css

.was-validated .custom-control-input:valid:focus ~ .custom-control-label::before,
.custom-control-input.is-valid:focus ~ .custom-control-label::before {
  box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
}

bootstrap5.css

.was-validated .custom-control-input:valid:focus:not(:checked) ~ .custom-control-label::before,
.custom-control-input.is-valid:focus:not(:checked) ~ .custom-control-label::before {
  border-color: #28a745;
}

bootstrap5.css

.was-validated .custom-file-input:valid ~ .custom-file-label,
.custom-file-input.is-valid ~ .custom-file-label {
  border-color: #28a745;
}

bootstrap5.css

.was-validated .custom-file-input:valid ~ .valid-feedback,
.was-validated .custom-file-input:valid ~ .valid-tooltip,
.custom-file-input.is-valid ~ .valid-feedback,
.custom-file-input.is-valid ~ .valid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .custom-file-input:valid:focus ~ .custom-file-label,
.custom-file-input.is-valid:focus ~ .custom-file-label {
  border-color: #28a745;
  box-shadow: 0 0 0 0.2rem rgba(40, 167, 69, 0.25);
}

bootstrap5.css

.was-validated .custom-select:invalid:focus,
.custom-select.is-invalid:focus {
  border-color: #dc3545;
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

bootstrap5.css

.was-validated .custom-select:invalid ~ .invalid-feedback,
.was-validated .custom-select:invalid ~ .invalid-tooltip,
.custom-select.is-invalid ~ .invalid-feedback,
.custom-select.is-invalid ~ .invalid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .custom-control-input:invalid ~ .custom-control-label,
.custom-control-input.is-invalid ~ .custom-control-label {
  color: #dc3545;
}

bootstrap5.css

.was-validated .custom-control-input:invalid ~ .custom-control-label::before,
.custom-control-input.is-invalid ~ .custom-control-label::before {
  border-color: #dc3545;
}

bootstrap5.css

.was-validated .custom-control-input:invalid ~ .invalid-feedback,
.was-validated .custom-control-input:invalid ~ .invalid-tooltip,
.custom-control-input.is-invalid ~ .invalid-feedback,
.custom-control-input.is-invalid ~ .invalid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .custom-control-input:invalid:checked ~ .custom-control-label::before,
.custom-control-input.is-invalid:checked ~ .custom-control-label::before {
  border-color: #e4606d;
  background-color: #e4606d;
}

bootstrap5.css

.was-validated .custom-control-input:invalid:focus ~ .custom-control-label::before,
.custom-control-input.is-invalid:focus ~ .custom-control-label::before {
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

bootstrap5.css

.was-validated .custom-control-input:invalid:focus:not(:checked) ~ .custom-control-label::before,
.custom-control-input.is-invalid:focus:not(:checked) ~ .custom-control-label::before {
  border-color: #dc3545;
}

bootstrap5.css

.was-validated .custom-file-input:invalid ~ .custom-file-label,
.custom-file-input.is-invalid ~ .custom-file-label {
  border-color: #dc3545;
}

bootstrap5.css

.was-validated .custom-file-input:invalid ~ .invalid-feedback,
.was-validated .custom-file-input:invalid ~ .invalid-tooltip,
.custom-file-input.is-invalid ~ .invalid-feedback,
.custom-file-input.is-invalid ~ .invalid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .custom-file-input:invalid:focus ~ .custom-file-label,
.custom-file-input.is-invalid:focus ~ .custom-file-label {
  border-color: #dc3545;
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

bootstrap5.css

@media (min-width: 576px) {
  .form-inline label {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-align: center;
    align-items: center;
    -ms-flex-pack: center;
    justify-content: center;
    margin-bottom: 0;
  }
  .form-inline .form-group {
    display: -ms-flexbox;
    display: flex;
    -ms-flex: 0 0 auto;
    flex: 0 0 auto;
    -ms-flex-flow: row wrap;
    flex-flow: row wrap;
    -ms-flex-align: center;
    align-items: center;
    margin-bottom: 0;
  }
  .form-inline .form-control {
    display: inline-block;
    width: auto;
    vertical-align: middle;
  }
  .form-inline .form-control-plaintext {
    display: inline-block;
  }
  .form-inline .input-group,
  .form-inline .custom-select {
    width: auto;
  }
  .form-inline .form-check {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-align: center;
    align-items: center;
    -ms-flex-pack: center;
    justify-content: center;
    width: auto;
    padding-left: 0;
  }
  .form-inline .form-check-input {
    position: relative;
    -ms-flex-negative: 0;
    flex-shrink: 0;
    margin-top: 0;
    margin-right: 0.25rem;
    margin-left: 0;
  }
  .form-inline .custom-control {
    -ms-flex-align: center;
    align-items: center;
    -ms-flex-pack: center;
    justify-content: center;
  }
  .form-inline .custom-control-label {
    margin-bottom: 0;
  }
}

bootstrap5.css

.input-group > .form-control,
.input-group > .form-control-plaintext,
.input-group > .custom-select,
.input-group > .custom-file {
  position: relative;
  -ms-flex: 1 1 auto;
  flex: 1 1 auto;
  width: 1%;
  margin-bottom: 0;
}

bootstrap5.css

.input-group > .form-control + .form-control,
.input-group > .form-control + .custom-select,
.input-group > .form-control + .custom-file,
.input-group > .form-control-plaintext + .form-control,
.input-group > .form-control-plaintext + .custom-select,
.input-group > .form-control-plaintext + .custom-file,
.input-group > .custom-select + .form-control,
.input-group > .custom-select + .custom-select,
.input-group > .custom-select + .custom-file,
.input-group > .custom-file + .form-control,
.input-group > .custom-file + .custom-select,
.input-group > .custom-file + .custom-file {
  margin-left: -1px;
}

bootstrap5.css

.input-group > .form-control:focus,
.input-group > .custom-select:focus,
.input-group > .custom-file .custom-file-input:focus ~ .custom-file-label {
  z-index: 3;
}

bootstrap5.css

.input-group > .custom-file .custom-file-input:focus {
  z-index: 4;
}

bootstrap5.css

.input-group > .form-control:not(:last-child),
.input-group > .custom-select:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

bootstrap5.css

.input-group > .form-control:not(:first-child),
.input-group > .custom-select:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

bootstrap5.css

.input-group > .custom-file {
  display: -ms-flexbox;
  display: flex;
  -ms-flex-align: center;
  align-items: center;
}

bootstrap5.css

.input-group > .custom-file:not(:last-child) .custom-file-label,
.input-group > .custom-file:not(:last-child) .custom-file-label::after {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

bootstrap5.css

.input-group > .custom-file:not(:first-child) .custom-file-label {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
}

bootstrap5.css

.input-group-lg > .form-control:not(textarea),
.input-group-lg > .custom-select {
  height: calc(1.5em + 1rem + 2px);
}

bootstrap5.css

.input-group-lg > .form-control,
.input-group-lg > .custom-select,
.input-group-lg > .input-group-prepend > .input-group-text,
.input-group-lg > .input-group-append > .input-group-text,
.input-group-lg > .input-group-prepend > .btn,
.input-group-lg > .input-group-append > .btn {
  padding: 0.5rem 1rem;
  font-size: 1.25rem;
  line-height: 1.5;
  border-radius: 0.3rem;
}

bootstrap5.css

.input-group-sm > .form-control:not(textarea),
.input-group-sm > .custom-select {
  height: calc(1.5em + 0.5rem + 2px);
}

bootstrap5.css

.input-group-sm > .form-control,
.input-group-sm > .custom-select,
.input-group-sm > .input-group-prepend > .input-group-text,
.input-group-sm > .input-group-append > .input-group-text,
.input-group-sm > .input-group-prepend > .btn,
.input-group-sm > .input-group-append > .btn {
  padding: 0.25rem 0.5rem;
  font-size: 0.875rem;
  line-height: 1.5;
  border-radius: 0.2rem;
}

bootstrap5.css

.input-group-lg > .custom-select,
.input-group-sm > .custom-select {
  padding-right: 1.75rem;
}

bootstrap5.css

.custom-control {
  position: relative;
  display: block;
  min-height: 1.5rem;
  padding-left: 1.5rem;
}

bootstrap5.css

.custom-control-inline {
  display: -ms-inline-flexbox;
  display: inline-flex;
  margin-right: 1rem;
}

bootstrap5.css

.custom-control-input {
  position: absolute;
  z-index: -1;
  opacity: 0;
}

bootstrap5.css

.custom-control-input:checked ~ .custom-control-label::before {
  color: #fff;
  border-color: #007bff;
  background-color: #007bff;
}

bootstrap5.css

.custom-control-input:focus ~ .custom-control-label::before {
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

bootstrap5.css

.custom-control-input:focus:not(:checked) ~ .custom-control-label::before {
  border-color: #80bdff;
}

bootstrap5.css

.custom-control-input:not(:disabled):active ~ .custom-control-label::before {
  color: #fff;
  background-color: #b3d7ff;
  border-color: #b3d7ff;
}

bootstrap5.css

.custom-control-input:disabled ~ .custom-control-label {
  color: #6c757d;
}

bootstrap5.css

.custom-control-input:disabled ~ .custom-control-label::before {
  background-color: #e9ecef;
}

bootstrap5.css

.custom-control-label {
  position: relative;
  margin-bottom: 0;
  vertical-align: top;
}

bootstrap5.css

.custom-control-label::before {
  position: absolute;
  top: 0.25rem;
  left: -1.5rem;
  display: block;
  width: 1rem;
  height: 1rem;
  pointer-events: none;
  content: "";
  background-color: #fff;
  border: #adb5bd solid 1px;
}

bootstrap5.css

.custom-control-label::after {
  position: absolute;
  top: 0.25rem;
  left: -1.5rem;
  display: block;
  width: 1rem;
  height: 1rem;
  content: "";
  background: no-repeat 50% / 50% 50%;
}

bootstrap5.css

.custom-checkbox .custom-control-label::before {
  border-radius: 0.25rem;
}

bootstrap5.css

.custom-checkbox .custom-control-input:indeterminate ~ .custom-control-label::before {
  border-color: #007bff;
  background-color: #007bff;
}

bootstrap5.css

.custom-checkbox .custom-control-input:disabled:checked ~ .custom-control-label::before {
  background-color: rgba(0, 123, 255, 0.5);
}

bootstrap5.css

.custom-checkbox .custom-control-input:disabled:indeterminate ~ .custom-control-label::before {
  background-color: rgba(0, 123, 255, 0.5);
}

bootstrap5.css

.custom-radio .custom-control-label::before {
  border-radius: 50%;
}

bootstrap5.css

.custom-radio .custom-control-input:disabled:checked ~ .custom-control-label::before {
  background-color: rgba(0, 123, 255, 0.5);
}

bootstrap5.css

.custom-switch {
  padding-left: 2.25rem;
}

bootstrap5.css

.custom-switch .custom-control-label::before {
  left: -2.25rem;
  width: 1.75rem;
  pointer-events: all;
  border-radius: 0.5rem;
}

bootstrap5.css

.custom-switch .custom-control-label::after {
  top: calc(0.25rem + 2px);
  left: calc(-2.25rem + 2px);
  width: calc(1rem - 4px);
  height: calc(1rem - 4px);
  background-color: #adb5bd;
  border-radius: 0.5rem;
  transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out, -webkit-transform 0.15s ease-in-out;
  transition: transform 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  transition: transform 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out, -webkit-transform 0.15s ease-in-out;
}

bootstrap5.css

@media (prefers-reduced-motion: reduce) {
  .custom-switch .custom-control-label::after {
    transition: none;
  }
}

bootstrap5.css

.custom-switch .custom-control-input:checked ~ .custom-control-label::after {
  background-color: #fff;
  -webkit-transform: translateX(0.75rem);
  transform: translateX(0.75rem);
}

bootstrap5.css

.custom-switch .custom-control-input:disabled:checked ~ .custom-control-label::before {
  background-color: rgba(0, 123, 255, 0.5);
}

bootstrap5.css

.custom-select:focus {
  border-color: #80bdff;
  outline: 0;
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

bootstrap5.css

.custom-select:focus::-ms-value {
  color: #495057;
  background-color: #fff;
}

bootstrap5.css

.custom-select[multiple],
.custom-select[size]:not([size="1"]) {
  height: auto;
  padding-right: 0.75rem;
  background-image: none;
}

bootstrap5.css

.custom-select:disabled {
  color: #6c757d;
  background-color: #e9ecef;
}

bootstrap5.css

.custom-select::-ms-expand {
  display: none;
}

bootstrap5.css

.custom-select-sm {
  height: calc(1.5em + 0.5rem + 2px);
  padding-top: 0.25rem;
  padding-bottom: 0.25rem;
  padding-left: 0.5rem;
  font-size: 0.875rem;
}

bootstrap5.css

.custom-select-lg {
  height: calc(1.5em + 1rem + 2px);
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  padding-left: 1rem;
  font-size: 1.25rem;
}

bootstrap5.css

.custom-file {
  position: relative;
  display: inline-block;
  width: 100%;
  height: calc(1.5em + 0.75rem + 2px);
  margin-bottom: 0;
}

bootstrap5.css

.custom-file-input {
  position: relative;
  z-index: 2;
  width: 100%;
  height: calc(1.5em + 0.75rem + 2px);
  margin: 0;
  opacity: 0;
}

bootstrap5.css

.custom-file-input:focus ~ .custom-file-label {
  border-color: #80bdff;
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

bootstrap5.css

.custom-file-input:disabled ~ .custom-file-label {
  background-color: #e9ecef;
}

bootstrap5.css

.custom-file-input:lang(en) ~ .custom-file-label::after {
  content: "Browse";
}

bootstrap5.css

.custom-file-input ~ .custom-file-label[data-browse]::after {
  content: attr(data-browse);
}

bootstrap5.css

.custom-file-label {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1;
  height: calc(1.5em + 0.75rem + 2px);
  padding: 0.375rem 0.75rem;
  font-weight: 400;
  line-height: 1.5;
  color: #495057;
  background-color: #fff;
  border: 1px solid #ced4da;
  border-radius: 0.25rem;
}

bootstrap5.css

.custom-file-label::after {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  display: block;
  height: calc(1.5em + 0.75rem);
  padding: 0.375rem 0.75rem;
  line-height: 1.5;
  color: #495057;
  content: "Browse";
  background-color: #e9ecef;
  border-left: inherit;
  border-radius: 0 0.25rem 0.25rem 0;
}

bootstrap5.css

.custom-range {
  width: 100%;
  height: calc(1rem + 0.4rem);
  padding: 0;
  background-color: transparent;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

bootstrap5.css

.custom-range:focus {
  outline: none;
}

bootstrap5.css

.custom-range:focus::-webkit-slider-thumb {
  box-shadow: 0 0 0 1px #fff, 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

bootstrap5.css

.custom-range:focus::-moz-range-thumb {
  box-shadow: 0 0 0 1px #fff, 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

bootstrap5.css

.custom-range:focus::-ms-thumb {
  box-shadow: 0 0 0 1px #fff, 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

bootstrap5.css

.custom-range::-moz-focus-outer {
  border: 0;
}

bootstrap5.css

.custom-range::-webkit-slider-thumb {
  width: 1rem;
  height: 1rem;
  margin-top: -0.25rem;
  background-color: #007bff;
  border: 0;
  border-radius: 1rem;
  transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  -webkit-appearance: none;
  appearance: none;
}

bootstrap5.css

@media (prefers-reduced-motion: reduce) {
  .custom-range::-webkit-slider-thumb {
    transition: none;
  }
}

bootstrap5.css

.custom-range::-webkit-slider-thumb:active {
  background-color: #b3d7ff;
}

bootstrap5.css

.custom-range::-webkit-slider-runnable-track {
  width: 100%;
  height: 0.5rem;
  color: transparent;
  cursor: pointer;
  background-color: #dee2e6;
  border-color: transparent;
  border-radius: 1rem;
}

bootstrap5.css

.custom-range::-moz-range-thumb {
  width: 1rem;
  height: 1rem;
  background-color: #007bff;
  border: 0;
  border-radius: 1rem;
  transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  -moz-appearance: none;
  appearance: none;
}

bootstrap5.css

@media (prefers-reduced-motion: reduce) {
  .custom-range::-moz-range-thumb {
    transition: none;
  }
}

bootstrap5.css

.custom-range::-moz-range-thumb:active {
  background-color: #b3d7ff;
}

bootstrap5.css

.custom-range::-moz-range-track {
  width: 100%;
  height: 0.5rem;
  color: transparent;
  cursor: pointer;
  background-color: #dee2e6;
  border-color: transparent;
  border-radius: 1rem;
}

bootstrap5.css

.custom-range::-ms-thumb {
  width: 1rem;
  height: 1rem;
  margin-top: 0;
  margin-right: 0.2rem;
  margin-left: 0.2rem;
  background-color: #007bff;
  border: 0;
  border-radius: 1rem;
  transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  appearance: none;
}

bootstrap5.css

@media (prefers-reduced-motion: reduce) {
  .custom-range::-ms-thumb {
    transition: none;
  }
}

bootstrap5.css

.custom-range::-ms-thumb:active {
  background-color: #b3d7ff;
}

bootstrap5.css

.custom-range::-ms-track {
  width: 100%;
  height: 0.5rem;
  color: transparent;
  cursor: pointer;
  background-color: transparent;
  border-color: transparent;
  border-width: 0.5rem;
}

bootstrap5.css

.custom-range::-ms-fill-lower {
  background-color: #dee2e6;
  border-radius: 1rem;
}

bootstrap5.css

.custom-range::-ms-fill-upper {
  margin-right: 15px;
  background-color: #dee2e6;
  border-radius: 1rem;
}

bootstrap5.css

.custom-range:disabled::-webkit-slider-thumb {
  background-color: #adb5bd;
}

bootstrap5.css

.custom-range:disabled::-webkit-slider-runnable-track {
  cursor: default;
}

bootstrap5.css

.custom-range:disabled::-moz-range-thumb {
  background-color: #adb5bd;
}

bootstrap5.css

.custom-range:disabled::-moz-range-track {
  cursor: default;
}

bootstrap5.css

.custom-range:disabled::-ms-thumb {
  background-color: #adb5bd;
}

bootstrap5.css

.custom-control-label::before,
.custom-file-label,
.custom-select {
  transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

bootstrap5.css

@media (prefers-reduced-motion: reduce) {
  .custom-control-label::before,
  .custom-file-label,
  .custom-select {
    transition: none;
  }
}

html bootstrap5 Sample

ファイル選択：custom-file

  <form>
    <div class="mb-5">
      <input type="file" id="dafaultFile" lang="ja">
      <label for="dafaultFile">ファイル選択...</label>
    </div>
    <div class="custom-file">
      <input type="file" class="custom-file-input" id="customFile" lang="ja">
      <label class="custom-file-label" for="customFile">ファイル選択...</label>
    </div>
  </form>

カスタムのチェックボックスに不確定を指定する：indeterminate

  <form>
    <!-- カスタムフォームのチェックボックス -->
    <div class="custom-control custom-checkbox mb-3">
      <input type="checkbox" class="custom-control-input" id="checkbox08" checked>
      <label class="custom-control-label" for="checkbox08">選択済み</label>
    </div>
    <div class="custom-control custom-checkbox mb-3">
      <input type="checkbox" class="custom-control-input" id="checkbox09" unchecked>
      <label class="custom-control-label" for="checkbox09">未選択</label>
    </div>
    <div class="custom-control custom-checkbox mb-3">
      <input type="checkbox" class="custom-control-input indeterminate-box" id="checkbox10">
      <label class="custom-control-label" for="checkbox10">不確定</label>
    </div>
  </form>

カスタムのチェックボックスとラジオボタンを無効にする

  <form>
    <!-- チェックボックスを無効にする -->
    <div class="custom-control custom-checkbox">
      <input type="checkbox" class="custom-control-input" id="checkbox11" disabled>
      <label class="custom-control-label" for="checkbox11">
        チェック（無効）
      </label>
    </div>
    <!-- ラジオボタンを無効にする -->
    <div class="custom-control custom-radio">
      <input type="radio" name="radioDisabled" id="checkbox12" class="custom-control-input" disabled>
      <label class="custom-control-label" for="checkbox12">
        オプション（無効）
      </label>
    </div>
  </form>

カスタムのチェックボックスとラジオボタンを作成する：custom-checkboxとcustom-radio

  <form>
    <!-- カスタムフォームのチェックボックス -->
    <div class="custom-control custom-checkbox mb-3">
      <input type="checkbox" class="custom-control-input" id="checkbox13">
      <label class="custom-control-label" for="checkbox13">チェックする</label>
    </div>
    <!-- カスタムフォームのラジオボタン -->
    <div class="custom-control custom-radio">
      <input type="radio" id="option1" name="option" class="custom-control-input">
      <label class="custom-control-label" for="option1">オプション1</label>
    </div>
    <div class="custom-control custom-radio">
      <input type="radio" id="option2" name="option" class="custom-control-input">
      <label class="custom-control-label" for="option2">オプション2</label>
    </div>
  </form>

プルダウンメニュー：custom-select

  <form>
    <select class="custom-select" multiple>
      <option selected>選択してください</option>
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
  </form>

カスタムプルダウンメニュー選択肢の数を指定：custom-select

  <form>
    <select class="custom-select" size="2">
      <option selected>選択してください</option>
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
  </form>

プルダウンメニュー大：custom-select-lg

  <form>
    <select class="custom-select custom-select-lg">
      <option selected>選択してください</option>
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
  </form>

プルダウンメニュー小：custom-select-sm

  <form>
    <select class="custom-select custom-select-sm">
      <option selected>選択してください</option>
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
  </form>

カスタムセレクト：custom-select

オプション

  <div class="input-group mb-3">
    <div class="input-group-prepend">
      <label class="input-group-text" for="inputGroupSelect01">オプション</label>
    </div>
    <select class="custom-select" id="inputGroupSelect01">
      <option selected>選択してください</option>
      <option value="1">オプション1</option>
      <option value="2">オプション2</option>
      <option value="3">オプション3</option>
    </select>
  </div>

カスタムレンジ入力：custom-range

  <!-- レンジ上の●をマウスで動かして入力させる -->
  <form>
    <div class="form-group mb-5">
      <label for="customRange1">カスタムレンジ入力の例</label>
      <input type="range" class="custom-range" id="customRange1">
    </div>
    <div class="form-group mb-5">
      <label for="customRange2">0－５まで（min="0",max="5"）</label>
      <input type="range" class="custom-range" min="0" max="5" id="customRange2">
    </div>
    <div class="form-group mb-5">
      <label for="customRange3">0－５まで、0.5刻み（step="0.5"）</label>
      <input type="range" class="custom-range" min="0" max="5" step="0.5" id="customRange3">
    </div>
  </form>

custom-select

bootstrap5.css

html bootstrap5 Sample

ファイル選択：custom-file

カスタムのチェックボックスに不確定を指定する：indeterminate

カスタムのチェックボックスとラジオボタンを無効にする

カスタムのチェックボックスとラジオボタンを作成する：custom-checkboxとcustom-radio

プルダウンメニュー：custom-select

カスタムプルダウンメニュー選択肢の数を指定：custom-select

プルダウンメニュー 大：custom-select-lg

プルダウンメニュー 小：custom-select-sm

カスタムセレクト：custom-select

カスタムレンジ入力：custom-range

プルダウンメニュー大：custom-select-lg

プルダウンメニュー小：custom-select-sm