A program that will ask the user to give a string or a sentence and then the program will count the number of consonants and vowels using JavaScript programming language.
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Program Listing
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Count Consonants and Vowels Using JavaScript</title>
<style>
* {
box-sizing: border-box;
margin: 0;
padding: 0;
}
body {
min-height: 100vh;
display: flex;
justify-content: center;
align-items: center;
background-color: #cacaca;
color: #04181F;
font-family: sans-serif;
font-size: 90%;
}
main {
padding: 30px;
border-radius: 10px;
background-color: #f1f1f1;
width: 450px;
}
h1 {
margin-bottom: 5px;
font-size: 26px;
text-align: center;
}
h2 {
margin-bottom: 30px;
font-size: 20px;
text-align: center;
}
.block {
margin: 0 auto 12px;
display: flex;
align-items: center;
}
label {
display: block;
line-height: 40px;
background-color: #47356E;
color: #eee;
text-align: center;
}
textarea {
padding: 10px;
width: 100%;
font-size: 14px;
border-radius: 0;
border: 2px solid #04181F;
outline: none;
resize: none;
text-align: center;
margin: 0;
}
button {
display: inline-block;
padding: 15px;
background-color: #F68802;
color: #eee;
outline: none;
border: none;
cursor: pointer;
width: 100%;
font-size: 16px;
text-decoration: none;
text-align: center;
transition: all .2s;
margin-top: 5px;
}
button:hover {
opacity: 0.9;
}
.output {
display: block;
width: 100%;
margin-top: 12px;
padding: 20px 0;
background-color: #2F4C58;
font-size: 16px;
text-align:center;
color: #f3f3f3;
line-height: 1.5;
}
.hide {
display: none;
}
</style>
</head>
<body>
<main class="container">
<h1>Count Consonants and Vowels<br>Using JavaScript</h1>
<h2>Jake R. Pomperada, MAED-IT, MIT</h2>
<form action="" id="frmCount">
<label for="grade1">Enter a sentence:</label>
<textarea name="" id="txtContent" rows="3" required></textarea>
<button type="submit">Count</button>
<div class="output hide"></div>
</form>
</main>
<script>
document.querySelector('#frmCount').onsubmit = (e) => {
e.preventDefault()
let content = document.querySelector('#txtContent').value,
output = document.querySelector('.output'),
countConsonants = () => {
return content.match(/[^aeiou\s]/gi).length
},
countVowels = () => {
return content.match(/[aeiou]/gi).length
}
output.classList.remove('hide')
output.innerHTML = 'Number of Vowels: '+countVowels()+'<br>'+
'Number of Consonants: '+countConsonants()+'<br>'
}
</script>
</body>
</html>
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