Basic JS Callback Examples

Developer
Shayne Trosdahl
Size
1,729 Kb
Views
14,168
  1. Basic JS Callback Examples Previews
  2. Basic JS Callback Examples HTML Codes
  3. Basic JS Callback Examples JS Codes

How do I make an basic js callback examples?

What is a basic js callback examples? How do you make a basic js callback examples? This script and codes were developed by Shayne Trosdahl on 05 December 2022, Monday.

Basic JS Callback Examples Previews
IQ Test

Basic JS Callback Examples - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>Basic JS Callback Examples</title>
</head>
<body> <script src="js/index.js"></script>
</body>
</html>

Basic JS Callback Examples - Script Codes JS Codes

function sendMessage(message, callback) { if (!message) return callback(false); return callback(true);
}
sendMessage('some message', function (status) { if (status) return 'message sent'; return 'message not sent';
});
// function with optional callback
//
function doThing(optionalCallback) { console.log('doThing()'); // if callback provided we can use otherwise return a value // if (optionalCallback && (typeof optionalCallback === 'function')) { console.log('callback exists and is fn'); return optionalCallback(); } else { return console.log('no callb ack so just return this log'); }
}
doThing();
doThing(function () { console.log('doThing() callback()');
});
// create a function to check if param is callback for reuse.
//
function isFn(fn) { console.log('ifFn() check to see if fn is who it claims to be'); if (fn && (typeof fn === 'function')) return true; return false;
}
function doThing2(optionalCallback) { console.log('doThing2() optionalCallback()'); if (isFn(optionalCallback)) { return optionalCallback(); } else { return console.log('no callb ack so just return this log'); }
}
doThing2();
doThing2(function () { console.log('doThing2() callback()');
});
Basic JS Callback Examples - Script Codes
Basic JS Callback Examples - Script Codes
Home Page Home
Developer Shayne Trosdahl
Username Trozdol
Uploaded December 05, 2022
Rating 3
Size 1,729 Kb
Views 14,168
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