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JavaScript: Get seconds with leading zeros

JavaScript Datetime: Exercise-36 with Soutilon

Write a JavaScript function to get seconds with leading zeros (00 through 59).

Test Data:
dt = new Date();
console.log(seconds_with_leading_zeros(dt));
"India Standard Time"

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to get seconds with leading zeros (00 through 59)</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function seconds_with_leading_zeros(dt) 
{ 
  return (dt.getMinutes() < 10 ? '0' : '') + dt.getMinutes();
}

dt = new Date(); 
console.log(seconds_with_leading_zeros(dt)); 

dt = new Date(1989, 10, 1); 
console.log(seconds_with_leading_zeros(dt));

Sample Output:

47
00

Flowchart:

Flowchart: JavaScript- Get seconds with leading zeros

Live Demo:

See the Pen JavaScript - Get seconds with leading zeros-date-ex-36 by w3resource (@w3resource) on CodePen.


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Next: Write a JavaScript function to get Timezone.

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JavaScript: Tips of the Day

Promise.all method

const promise1 = Promise.resolve('First')
const promise2 = Promise.resolve('Second')
const promise3 = Promise.reject('Third')
const promise4 = Promise.resolve('Fourth')

const runPromises = async () => {
	const res1 = await Promise.all([promise1, promise2])
	const res2  = await Promise.all([promise3, promise4])
	return [res1, res2]
}

runPromises()
	.then(res => console.log(res))
	.catch(err => console.log(err))

The Promise.all method runs the passed promises in parallel. If one promise fails, the Promise.all method rejects with the value of the rejected promise. In this case, promise3 rejected with the value "Third". We're catching the rejected value in the chained catch method on the runPromises invocation to catch any errors within the runPromises function. Only "Third" gets logged, since promise3 rejected with this value.