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section-02.html
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section-02.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<link href="./main.css" rel="stylesheet">
</head>
<body>
<form>
<label for="input">Input</label>
<textarea id="input" rows="2"></textarea>
<div id="keyboard">
<button class="keyboard-key" type="button" data-char="あ">あ</button>
<button class="keyboard-key" type="button" data-char="い">い</button>
<button class="keyboard-key" type="button" data-char="う">う</button>
<button class="keyboard-key" type="button" data-char="え">え</button>
<button class="keyboard-key" type="button" data-char="お">お</button>
</div>
<button id="submit" type="button">Submit</button>
<hr>
<label>Output</label>
<pre id="output"></pre>
</form>
</body>
<script>
/*
We're organising all the keyboard logic into a single 'KeyboardApp'.
*/
class KeyboardApp {
constructor () {
// Let's register all the HTML elements to make them easier to access later.
this.html = {
input: document.getElementById('input'),
keyboard: document.getElementById('keyboard'),
submit: document.getElementById('submit'),
output: document.getElementById('output'),
}
// Let's register all the event handling
this.html.submit.onclick = this.submit.bind(this)
this.setupKeyboard()
}
/*
This 'submit' logic is just placeholder for what you actually want to do.
Normally, this is where we'd submit the input data to a server. For our
example, we just print the text into the output field.
*/
submit () {
const text = input.value
output.innerText = text
}
/*
setupKeyboard() does exactly what it says on the tin.
*/
setupKeyboard () {
// In this version, we've hardcoded the keyboard keys into the HTML
const keyboardKeys = Array.from(document.getElementsByClassName('keyboard-key'))
// We're going through each <button#keyboard-key> and attaching a simple
// 'insert the character associated with this button' action.
keyboardKeys.forEach((keyboardKey) => {
const char = keyboardKey.dataset.char
keyboardKey.onclick = () => { this.insertChar(char) }
});
}
/*
insertChar() inserts a single character to the (end of the) input text box.
*/
insertChar (char) {
this.html.input.value = this.html.input.value + char
}
}
var app = new KeyboardApp() // Let's start the app!
</script>
</html>