我需要尋求幫助來解決兩個問題。JS - typeof不適用於輸入| document.getElementById問題
document.getElementById.value
保存在let
不保存在不同的let
innerHTML
工作。我看到一些類似的線索,但他們沒有幫助我。當我需要檢查數字
typeof
時,出現了一個問題,它只是運行,因爲JS沒有看到它。
這是我的代碼。感謝您的任何建議和幫助。
function wage() {
let input = document.getElementById('annualInput').value;
let output = document.getElementById('resultMonthly').innerHTML;
// it doesn't work, but it works with pure document.getElementById('result').innerHTML = input;
output = input;
/*
if (input !== '') {
// this if doesn't work even with string and number
if (typeof input == 'number')
document.getElementById('result').innerHTML = input;
} else {
document.getElementById('result').innerHTML = 'Please, type your annual wage';
}
*/
// annual wage devided by 12 months
let resultMonthly = input/12;
let showMonthly = 'Your monthly wage: ' + resultMonthly.toFixed(2);
// monthly wage devided by 20 days
let resultDaily = resultMonthly/20;
let showDaily = 'Your daily wage: ' + resultDaily.toFixed(2);
// daily wage devided by 8 hours
let resultHourly = resultDaily/8;
let showHourly = 'Your hourly wage: ' + resultHourly.toFixed(2);
if (input !== '') {
document.getElementById('resultMonthly').innerHTML = showMonthly + ' $';
document.getElementById('resultDaily').innerHTML = showDaily + ' $';
document.getElementById('resultHourly').innerHTML = showHourly + ' $';
} else {
document.getElementById('resultMonthly').innerHTML = 'Please, type your annual wage';
}
}
<!DOCTYPE html>
<html>
<head>
<title>Wage App</title>
<meta charset="utf-8">
<title>Issue App</title>
<link rel="stylesheet" type="text/css" href="wageup.css">
</head>
<body>
<div class="container">
<div class="jumbotron">
<!-- the title and desc -->
<h1 class="display-4 text-center">WageApp</h1>
<p class="h6 text-center" id="paragraphTitle">
This is a simple App for calculating wage by year, month, day and hour
</p>
<hr class="my-4">
<!-- input-form -->
<form>
<div class="form-group">
<label for="annualInput">Your annual wage</label>
<input type="annualData" class="form-control" id="annualInput" aria-describedby="hep" placeholder="Annual wage in $">
<small id="help" class="form-text text-muted">We'll never share your wage with anyone else.</small>
</div>
<button onclick="wage()" type="button" class="btn btn-primary btn-sm" id="checkButton">Check</button>
</form>
</div>
<div class="alert alert-success" role="alert" id="resultMonthly"></div>
<div class="alert alert-info" role="alert" id="resultDaily"></div>
<div class="alert alert-warning" role="alert" id="resultHourly"></div>
</div>
<!-- JS -->
<script type="text/javascript" src="wageUp.js">
<!-- Jquery -->
<script src="https://code.jquery.com/jquery-3.2.1.min.js" integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4=" crossorigin="anonymous"></script>
<!-- Bootstrap -->
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
</body>
</html>
什麼是'type =「annualData」'?和一個文本框的類型將是一個字符串,它不會是一個數字。 – epascarello
正常輸入元素的值是字符串類型 – user2520818