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Optional Arguments in JavaScript Functions
To declare optional function parameters in JavaScript, use the “default” arguments.
Example
You can try to run the following code to declare optional parameters −
<html>
<body>
<script>
// default is set to 1
function inc(val1, inc = 1) {
return val1 + inc;
}
document.write(inc(10,10));
document.write("<br>");
document.write(inc(10));
</script>
</body>
</html>
Updated on: 2020-06-22T14:42:54+05:30
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