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JavaScript: Check whether an input is a date object or not

JavaScript Datetime: Exercise-1 with Solution

Write a JavaScript function to check whether an 'input' is a date object or not.

Test Data:
console.log(is_date("October 13, 2014 11:13:00"));
console.log(is_date(new Date(86400000)));
console.log(is_date(new Date(99,5,24,11,33,30,0)));
console.log(is_date([1, 2, 4, 0]));
Output :
false
true
true
false

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Checking a date object</title>
</head>
<body>
</body>
</html>

JavaScript Code:

var is_date = function(input) {
  if ( Object.prototype.toString.call(input) === "[object Date]" ) 
    return true;
  return false;   
    };

console.log(is_date("October 13, 2014 11:13:00"));
console.log(is_date(new Date(86400000)));
console.log(is_date(new Date(99,5,24,11,33,30,0)));
console.log(is_date([1, 2, 4, 0]));

Sample Output:

false
true
true
false

Flowchart:

Flowchart: JavaScript- Check whether an input is a date object or not

Live Demo:

See the Pen JavaScript - common-editor-exercises-date-ex- 1 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript function to get the current date.

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JavaScript: Tips of the Day

Converts the given array elements into <li> tags and appends them to the list of the given id.

Example:

const tips_arrayToHtmlList = (arr, listID) =>(el => ((el = document.querySelector('#' + listID)),(el += arr.map(item => '<li>${item}</li>').join(''))))();
console.log(tips_arrayToHtmlList(['item 1', 'item 2'], 'myListID'));

Output:

"null
  • ${item}
  • ${item}
  • "