Underscore.js _.defaults() function returns the object after filling in its undefined properties with the first value present in the following list of default objects.
Syntax:
_.defaults(object, *defaults);Parameters:
- object: This parameter holds the value of an object.
- defaults: It is an optional parameter. It contains the [key, value] pair of an object.
Return Value:
It returns the object after filling in its undefined properties with the first value present in the following list of default objects.
Example 1: The below code example implements the _.defaults() function in underscore.js.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script type="text/javascript">
const info = {
Company: 'GeeksforGeeks',
Address: 'Noida',
Contact: '+91 9876543210'
};
console.log(_.defaults(info,
{
Contact: '+91 9898989898',
Name: 'Rakesh'
})
);
</script>
</body>
</html>
Output:
Example 2: This is another implementation of the _.defaults() function.
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js">
</script>
</head>
<body>
<script type="text/javascript">
const info = {
Company: 'GeeksforGeeks',
Address: 'Noida',
Contact: '+91 9876543210'
};
const def = {
Name: 'Ashok',
Age: '34',
Company: 'GFG'
}
console.log(_.defaults(info, def));
</script>
</body>
</html>
Output:
