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JavaScript - subtract seconds from date
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In this article, we would like to show you how to subtract seconds from date in JavaScript.
Quick solution:
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const date = new Date('2021-06-30T00:00:00.000Z');2
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date.setSeconds(date.getSeconds() - 2); // subtracted 2 seconds from existing date4
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console.log(date.toISOString()); // 2021-06-29T23:59:58.000Z
In this example, we create a simple function that takes two arguments:
datefrom which we want to subtract some seconds,seconds- a number of seconds we want to subtract.
Runnable example:
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const subtractSeconds = (date, seconds) => {2
let result = new Date(date);3
result.setSeconds(result.getSeconds() - seconds);4
return result;5
};6
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let date = new Date('2021-06-30T00:00:00.000Z');8
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console.log(subtractSeconds(date, 1).toISOString());10
Output:
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2021-06-29T23:59:59.000ZNote:
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.subtractSeconds = function(seconds) {2
let date = new Date(this.valueOf());3
date.setSeconds(date.getSeconds() - seconds);4
return date;5
}6
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let date = new Date('2021-06-30T00:00:00.000Z');8
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console.log(date.subtractSeconds(2).toISOString());Output:
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2021-06-29T23:59:58.000Z