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In this tutorial, we'll take a look at how to get the number of days between dates in JavaScript. Even though, at heart, a Date object is defined in terms of UTC , all of its methods fetch times and dates in the local time zone:. Now that we are familiar with the syntax, let's look at how to get the number of days between two dates using the Date object in JavaScript. To get the number of days between two dates, we'll make a simple function getNumberOfDays , which accepts two Date objects:.
The function accepts two String s, which represent dates. We just launched W3Schools videos. Get certified by completing a course today! If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:.
Properties: constructor global ignoreCase lastIndex multiline source Methods: compile exec test toString. Same as "mini" style but outputs "now" instead of "0s". Same as "mini-minute" style but outputs "now" instead of "0m".
Mimics Twitter style of "time ago" labels "1s" , "2m" , "3h" , "Mar 4" , "Apr 5, ". Send pull requests for the missing ones. Same as "twitter" style but outputs "now" instead of "0s". Same as "twitter-minute" style but outputs "now" instead of "0m". Same as "twitter" style but doesn't output anything before the first minute. A custom "style" object may be passed as a second parameter to. When not defined, is set to "long" by default. For example, for labels: ["mini", "short"] it will search for "mini" labels first and then fall back to "short" labels if "mini" labels aren't defined for the language.
Other time labels like "now" and "mini" are only defined for a small subset of languages. Send your pull requests for the missing ones. Each "step" is tried until the last matching one is found, and that "step" is then used to generate the output.
If no matching step was found, then an empty string is returned. A minimum time interval in seconds required for a step, meaning that minTime controls the progression from one step to another. Every step must define a minTime in one way or another. The first step's minTime is 0 by default. If a step is defined by formatAs , and its previous step is also defined by formatAs , then such step's minTime , if not specified, is calculated automatically according to the selected "rounding".
While minTime is usually a number, it could also be a function returning a number in order to support unusual cases like absolute date formatting in "twitter" style. A time measurement unit, the labels for which are used to generate the output of a step. If the time unit isn't supported by the language, then the step is ignored. The time units supported in all languages are: second , minute , hour , day , week , month , quarter , year. For some languages , this library also defines now unit "just now".
Alternatively to formatAs , a step may specify a format function:. The default round is "round" which equals to Math. Some people asked for an alternative rounding method, so there's also round: "floor" which equals to Math.
A developer can choose the rounding method by passing round option to timeAgo. The default rounding can also be set for a style by setting its round property. Zero time interval is a special case: by default, it's formatted in past time.
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