JavaScript: Get the quarter of the year

JavaScript Datetime: Exercise-15 with Solution

Write a JavaScript function to get the quarter (1 to 4) of the year.

Test Data:
console.log(quarter_of_the_year(new Date(2015, 1, 21)));
console.log(quarter_of_the_year(new Date(2015, 10, 18)));

Sample Solution:-

HTML Code:

<!DOCTYPE html>
  <meta charset="utf-8">
  <title>JavaScript function to get the the quarter (1 to 4) of the year</title>


JavaScript Code:

function quarter_of_the_year(date) 
    var month = date.getMonth() + 1;
    return (Math.ceil(month / 3));

console.log(quarter_of_the_year(new Date()));
console.log(quarter_of_the_year(new Date(2015, 1, 21))); 
console.log(quarter_of_the_year(new Date(2015, 10, 18)));

Sample Output:



Flowchart: JavaScript- Get the quarter  of the year

Live Demo:

See the Pen JavaScript - Get the quarter of the year-date-ex- 15 by w3resource (@w3resource) on CodePen.

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Previous: Write a JavaScript function to get the amount of days of a year.
Next: Write a JavaScript function to count the number of days passed since beginning of the year.

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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]

	.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.