Convert uniapp timestamp to date

With the advent of the mobile Internet era, the demand for APP development has emerged. Today, developers have gotten rid of the short-sightedness of a single language and are extensively exploring various cross-platform development frameworks. Nowadays, cross-platform development framework has become one of the mainstream directions of APP development, among which uniapp can be said to have been widely used.

When we use uniapp for APP development, we often encounter timestamp problems. Timestamps play a very important role in development. For example, in operations such as leaving messages, comments, and publishing articles, it is necessary to record the publishing time. So how to convert the timestamp into a date?

First, we need to understand what a timestamp is. The timestamp refers to the total number of milliseconds from 00:00:00 GMT on January 1, 1970 (08:00:00 Beijing time on January 1, 1970) to the present. Timestamps are commonly used in computer operations because they enable convenient calculation of time intervals.

As developers, we need to convert timestamps into dates. Uniapp provides a function new Date() to obtain the currently instantiated date object. The basic syntax of this method is: new Date(parameter).

In the process of converting the timestamp into a date, we need to convert the timestamp into the local time format. The time format in China is generally yyyy/MM/dd hh:mm:ss. Then we first convert the timestamp into a time string in the specified format, and then convert the time string into a date object. In uniapp, you can use the following function to convert timestamp to date.

function timestampToTime(timestamp) {
  const date = new Date(timestamp)
  const Y = date.getFullYear() + '/'
  const M = (date.getMonth()+1 < 10 ? '0'+(date.getMonth()+1) : date.getMonth()+1) + '/'
  const D = (date.getDate() < 10 ? '0'+(date.getDate()) : date.getDate()) + ' '
  const h = (date.getHours() < 10 ? '0'+(date.getHours()) : date.getHours()) + ':'
  const m = (date.getMinutes() < 10 ? '0'+(date.getMinutes()) : date.getMinutes()) + ':'
  const s = (date.getSeconds() < 10 ? '0'+(date.getSeconds()) : date.getSeconds())
  return Y+M+D+h+m+s
}

The above code uses the method of instantiating the date object to convert the timestamp into local time format and then into a time string in the specified format. Among them, date.getFullYear() is used to get the year, date.getMonth() 1 is used to get the month, you need to add one to get the actual month, date.getDate( ) is used to get the date, date.getHours() is used to get the hours, date.getMinutes() is used to get the minutes, date.getSeconds() Used to get seconds. Finally, we can concatenate these values ​​to get the time format we need.

In actual development, we can use it like this:

this.time = timestampToTime(1599364981865)

The above code creates a variable time in the data of the page, and then calls it in the onLoad life cycle function of the page timestampToTime() function, converts the timestamp into time format and saves it in the time variable.

Converting timestamp to date is a skill that developers need to master. Using JavaScript's date object and the new Date() function, we can easily convert timestamps to time formats. Using this method, we can provide support for the time format function in many scenarios in our APP development, and can also greatly improve our development efficiency.

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