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Incrementing Charlie's age with promises
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<html> | |
<body> | |
<pre id="display"></pre> | |
<script src="//cdn.jsdelivr.net/pouchdb/latest/pouchdb.min.js"></script> | |
<script src="index.js"></script> | |
</body> | |
</html> |
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Learn more about bidirectional Unicode characters
// Destroy the database before doing anything, because I want | |
// you to see the same thing if you reload. | |
// Ignore the man behind the curtain! | |
new PouchDB('sample').destroy().then(function () { | |
return new PouchDB('sample'); | |
}).then(function (db) { | |
// | |
// IMPORTANT CODE STARTS HERE | |
// | |
db.put({_id: 'charlie', age: 21}).then(function () { | |
return db.get('charlie'); | |
}).then(function (charlie) { | |
document.getElementById('display').innerHTML = 'Charlie is how old? ' + JSON.stringify(charlie); | |
// increment Charlie's age | |
charlie.age++; | |
return db.put(charlie); | |
}).then(function () { | |
return db.get('charlie'); | |
}).then(function (charlie) { | |
document.getElementById('display').innerHTML += '\nCharlie is how old? ' + JSON.stringify(charlie); | |
// increment Charlie's age again | |
charlie.age++; | |
return db.put(charlie); | |
}).then(function () { | |
return db.get('charlie'); | |
}).then(function (charlie) { | |
document.getElementById('display').innerHTML += '\nCharlie is how old? ' + JSON.stringify(charlie); | |
}).catch(function (err) { | |
console.log(err); | |
}); | |
// | |
// IMPORTANT CODE ENDS HERE | |
// | |
}); |
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