parseFloatは()私は、テキスト入力から番号を取得しようとしているのNaN
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<style>
.form-control {
margin-bottom: 15px;
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<nav class="navbar navbar-default">
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<h2 style="margin: 0px; padding: 0px;">Billing Calculator</h2>
</a>
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<form class="navbar-form navbar-left" role="search">
<div class="form-group">
<input type="date" class="form-control date" placeholder="Search">
<input type="date" class="form-control date" placeholder="Search">
<input type="date" class="form-control date" placeholder="Search">
<input type="date" class="form-control date" placeholder="Search">
<input type="date" class="form-control date" placeholder="Search">
<input type="date" class="form-control date" placeholder="Search">
<input type="date" class="form-control date" placeholder="Search">
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<div class="col-md-3">
<form class="navbar-form navbar-left" role="search">
<div class="form-group">
<input type="text" class="form-control" id="one" placeholder="hours">
<input type="text" class="form-control" id="two" placeholder="hours">
<input type="text" class="form-control" id="three" placeholder="hours">
<input type="text" class="form-control" id="four" placeholder="hours">
<input type="text" class="form-control" id="five" placeholder="hours">
<input type="text" class="form-control" id="six" placeholder="hours">
<input type="text" class="form-control" id="seven" placeholder="hours">
<button type="submit" class="btn btn-default" id="click">Calculate</button>
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<div class="col-md-1">
<form class="navbar-form navbar-left" role="search">
<div class="form-group">
<label for="form-control">Total Hours:</label>
<label for="form-control" id="totalHours">.</label>
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</form>
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<script type="text/javascript">
var hoursOne = parseFloat(document.getElementById("one").value);
document.getElementById("click").onclick = function(){
alert(hoursOne);
}
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を返すが、それは常にさえNaN
に警告します。プログラムは、作業時間と総時間を返す請求計算機であることを意味します。日付は実際に値とはあまり関係がありませんが、ユーザーの追跡を助けます。
HTMLコードも表示 –
多分、解析された値が3.14でないようにする必要があります。3,14 –