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writetext-after-fetch.html
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writetext-after-fetch.html
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<!DOCTYPE html>
<meta charset="UTF-8">
<title>Async Clipboard API: writeText() to copy fetched data</title>
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="_style.css">
<body>
<h1>Async Clipboard API: writeText() to copy fetched data</h1>
<div class="vstack">
<div>
Data: <span id="messageView"></span><br>
<pre id="dataView"></pre>
</div>
<div class="hstack">
<button type="button" id="buttonCopy">Copy</button>
<button type="button" id="buttonClear">Clear</button>
</div>
</div>
<footer>
<p><a href="/">Home</a></p>
</footer>
<script>
const buttonCopy = document.querySelector('#buttonCopy');
const buttonClear = document.querySelector('#buttonClear');
const message = document.querySelector('#messageView');
const dataView = document.querySelector('#dataView');
const state = {
data: null,
error: false,
message: '',
};
function updateView() {
dataView.textContent = state.data;
messageView.textContent = state.message;
messageView.classList.toggle('error', state.error);
}
buttonClear.addEventListener('click', (event) => {
state.data = null;
state.error = false;
state.message = '';
updateView();
});
const textFileUrl = './_plaintext.txt';
buttonCopy.addEventListener('click', (event) => {
fetch(textFileUrl).then((response) => {
if (!response.ok) {
throw new Error('fetch failed.');
}
return response.text();
}).then((responseText) => {
console.log('response:', responseText);
return navigator.clipboard.writeText(responseText);
}).then((text) => {
state.data = text;
state.error = false;
state.message = 'text copied to clipboard.';
console.log(state.message, text);
}).catch((error) => {
state.data = null;
state.error = true;
state.message = 'copy failed.';
console.error(state.message, error);
}).finally(() => {
updateView();
});
});
</script>