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JS Bin // source https://jsbin.com/cegiseq
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS Bin</title>
</head>
<body>
<pre id='display-panel'></pre>
<script id="jsbin-javascript">
function getRandomInt(min, max) {
return Math.random() * (max - min) + min;
}
const search = (word, callback) => {
const results = ['foo', 'bar', 'baz', 'baz2', 'etc', 'etc2'];
const numberOfResults = getRandomInt(1, results.length);
const randomTimeout = getRandomInt(1, 4);
setTimeout(() => {
callback(null, results.slice(0, numberOfResults));
}, randomTimeout);
};
const display = (data) => {
console.log('display', data);
const el = document.querySelector('#display-panel');
const msg = (typeof data === 'string') ? data : data.join(', ');
el.textContent = msg;
};
const displaySearchResults = (error, results) => {
if (error) {
display('Search failed, please retry later.');
} else {
display(results);
}
};
const word = 'cats';
// will display random results each time
// uncomment to check
// search(word, displaySearchResults);
const searchWrapper = (word, callback) => {
const key = `search-${word}`;
const results = sessionStorage.getItem(key);
if (results) {
// keeping things asynchronous
setTimeout(() => callback(null, results), 1);
} else {
search(word, (error, res) => {
if (error) { return callback(error); }
// keeping the results in cache
sessionStorage.setItem(key, res);
callback(null, res);
});
}
};
// will always display the same results because they are cached
searchWrapper('cats', displaySearchResults);
</script>
<script id="jsbin-source-javascript" type="text/javascript">function getRandomInt(min, max) {
return Math.random() * (max - min) + min;
}
const search = (word, callback) => {
const results = ['foo', 'bar', 'baz', 'baz2', 'etc', 'etc2'];
const numberOfResults = getRandomInt(1, results.length);
const randomTimeout = getRandomInt(1, 4);
setTimeout(() => {
callback(null, results.slice(0, numberOfResults));
}, randomTimeout);
};
const display = (data) => {
console.log('display', data);
const el = document.querySelector('#display-panel');
const msg = (typeof data === 'string') ? data : data.join(', ');
el.textContent = msg;
};
const displaySearchResults = (error, results) => {
if (error) {
display('Search failed, please retry later.');
} else {
display(results);
}
};
const word = 'cats';
// will display random results each time
// uncomment to check
// search(word, displaySearchResults);
const searchWrapper = (word, callback) => {
const key = `search-${word}`;
const results = sessionStorage.getItem(key);
if (results) {
// keeping things asynchronous
setTimeout(() => callback(null, results), 1);
} else {
search(word, (error, res) => {
if (error) { return callback(error); }
// keeping the results in cache
sessionStorage.setItem(key, res);
callback(null, res);
});
}
};
// will always display the same results because they are cached
searchWrapper('cats', displaySearchResults);
</script></body>
</html>
function getRandomInt(min, max) {
return Math.random() * (max - min) + min;
}
const search = (word, callback) => {
const results = ['foo', 'bar', 'baz', 'baz2', 'etc', 'etc2'];
const numberOfResults = getRandomInt(1, results.length);
const randomTimeout = getRandomInt(1, 4);
setTimeout(() => {
callback(null, results.slice(0, numberOfResults));
}, randomTimeout);
};
const display = (data) => {
console.log('display', data);
const el = document.querySelector('#display-panel');
const msg = (typeof data === 'string') ? data : data.join(', ');
el.textContent = msg;
};
const displaySearchResults = (error, results) => {
if (error) {
display('Search failed, please retry later.');
} else {
display(results);
}
};
const word = 'cats';
// will display random results each time
// uncomment to check
// search(word, displaySearchResults);
const searchWrapper = (word, callback) => {
const key = `search-${word}`;
const results = sessionStorage.getItem(key);
if (results) {
// keeping things asynchronous
setTimeout(() => callback(null, results), 1);
} else {
search(word, (error, res) => {
if (error) { return callback(error); }
// keeping the results in cache
sessionStorage.setItem(key, res);
callback(null, res);
});
}
};
// will always display the same results because they are cached
searchWrapper('cats', displaySearchResults);
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