EN
JavaScript - add seconds to date
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In this article, we would like to show you how to add seconds to date in JavaScript.
In this example, we create a simple function that takes two arguments:
dateto which we want to add some seconds,seconds- a number of seconds we want to add.
Runnable example:
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const addSeconds = (date, seconds) => {2
const result = new Date(date);3
result.setSeconds(seconds + result.getSeconds());4
return result;5
};6
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// Usage example:9
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const date1 = new Date('2021-08-30T23:59:59.000Z');11
const date2 = addSeconds(date1, 2);12
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console.log(date2.toISOString()); // 2021-08-31T00:00:01.000ZOutput:
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2021-08-31T00:00:01.000ZNote:
As you can see, the function also handles the case of the day change.
In this example, we add a function to the Date.prototype so we can use it on any date object.
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Date.prototype.addSeconds = function(seconds) {2
const date = new Date(this.valueOf());3
date.setSeconds(seconds + date.getSeconds());4
return date;5
};6
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// Usage example:9
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const date1 = new Date('2021-08-30T23:59:59.000Z');11
const date2 = date1.addSeconds(2);12
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console.log(date2.toISOString()); // 2021-08-31T00:00:01.000ZOutput:
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2021-08-31T00:00:01.000Z