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<form class="container" id="needs-validation" novalidate>
<div class="row">
<div class="col-md-6 mb-3">
<label for="input-name">Name</label>
<input type="text" class="form-control" name="name" id="input-name" placeholder="Name" required>
<div class="invalid-feedback"></div>
</div>
</div>
<div class="row">
<div class="col-md-6 mb-3">
<label for="input-email">Email</label>
<input type="email" class="form-control" name="email" id="input-email" placeholder="example@email.jp" required>
<div class="invalid-feedback"></div>
</div>
</div>
<div class="row">
<div class="col-md-6 mb-3">
<label for="input-message">Message</label>
<textarea class="form-control" name="message" id="input-message" required maxlength="100" placeholder="最大100文字"></textarea>
<div class="message-text-counter">現在<span class="message-text-count">0</span>文字</div>
<div class="invalid-feedback"></div>
</div>
</div>
<button class="btn btn-primary" type="submit">Submit</button>
</form>
$(function() {
var $form = $("#needs-validation"),
$inputs = $form.find('.form-control'),
$email = $inputs.find('[name=name]'),
$message = $inputs.find('[name=message]'),
$content_text_counter = $form.find('.message-text-count');
$form.on("submit", function(event) {
if (event.target.checkValidity() == false) {
event.preventDefault();
event.stopPropagation();
validation($inputs);
}
$form.addClass("was-validated");
});
$inputs.on('change, keyup', function () {
validation($(this));
if($(this).is('[name=message]')) {
var count = countTxtLength($(this).val());
$content_text_counter.text(count);
}
});
});
var feedbackMessage = {};
feedbackMessage.name = {
valueMissing: '名前を入力してください',
};
feedbackMessage.email = {
valueMissing: 'メールアドレスを入力してください',
typeMismatch: '不正なメールアドレスです'
};
feedbackMessage.message = {
valueMissing: 'メッセージを入力してください',
tooLong: '文字数が長すぎます'
};
//バリデーション
//@param {JQuery} $inputs .form-control elements array
function validation($inputs) {
$inputs.each(function(i, el) {
var $el = $(el);
var id = $el.attr('id').replace('input-', '');
var validity = el.validity;
var $feedback = $el.find('~ .invalid-feedback');
var message = feedbackMessage[id];
$feedback.empty();
console.log(validity)
$.each(message, function(i, mes) {
if(validity[i] === true) {
$feedback.append(mes);
}
});
});
}
//文字数数える
//@param value {string} 数える文字列
//@param mode {number} 0=全部1 1=半角0.5 全角1
function countTxtLength(value, mode) {
var count = 0, mode = mode || 0;
for(var i = value.length; i--; ) {
if(mode === 1 && /^[\u0020-\u007e]+$/.test(value.charAt(i))) {
count += 0.5;
} else {
count += 1;
}
}
return count;
}
//サンプル
var _feedbackMessageSample = {
//ユーザーがUIが値に変換できない入力をした場合に true
badInput: '',
//要素の値が与えられたパターンにマッチしない場合に true
//[pattern]
patternMismatch: '',
//要素の値が与えられた最大値を超える場合に true
//[max]
rangeOverflow: '',
//要素の値が与えられた最小値を下回る場合に true
//[min]
rangeUnderflow: '',
//要素の値が step 属性で与えられた規則に合わない場合に true
//[step]
stepMismatch: '',
//要素の値が与えられた長さより長い場合に true
//[maxlength]
tooLong: '',
//要素の値が与えられた長さより短い場合に true
//[minlength]
tooShort: '',
//要素の値が正しい構文ではない場合に true
//[type=url][type=email]
typeMismatch: '',
//要素が入力必須のフィールドであるのに値がない場合に true
//[required]
valueMissing : ''
};
Also see: Tab Triggers