How to make year, month and day parallel in JavaScript-Front-end Q&A-php.cn

How to make year, month and day parallel in JavaScript

PHPz

Release： 2023-04-24 14:59:08

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Javascript is a commonly used web front-end development language. One of the common requirements is to display three pieces of information: year, month, and day on the web page at the same time, and these three pieces of information need to be in parallel form. This is very common in web design, such as the publication time of news articles, birthday information on profile pages, etc. So, in Javascript, how can we achieve such a requirement?

1. Ideas

There are many ways to achieve parallel year, month and day. The author introduces a relatively simple idea here:

1. First get the current system time.

2. Format the time information, for example, store the year, month, and day in a variable respectively.

3. Display the obtained year, month and day information in parallel through HTML.

2. Code implementation

1. Get the current system time

To get the current system time, you can use the Date() object in Javascript. The code is as follows:

var today = new Date();

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2. Time information formatting

After obtaining the system time, we need to store the year, month and day in variables respectively. Here we use the method in the Date() object to obtain the year, month and day information, and then store it in an array, as follows:

var dateArr = [];
dateArr.push(today.getFullYear());
dateArr.push(today.getMonth() + 1);
dateArr.push(today.getDate());

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In the above code, the getFullYear() method obtains the complete year information, getMonth( ) method starts counting from 0, so it needs to be added by 1.

3. Parallel display of year, month and day information

We can use the table tag of HTML to create a table, and then display the year, month and day information in each row. The code is as follows:

<table>
  <tr>
    <td>年：</td>
    <td id="year"></td>
  </tr>
  <tr>
    <td>月：</td>
    <td id="month"></td>
  </tr>
  <tr>
    <td>日：</td>
    <td id="date"></td>
  </tr>
</table>

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Next, we use Javascript code to fill the year, month and day information into the corresponding td tag. The code is as follows:

document.getElementById("year").innerHTML = dateArr[0];
document.getElementById("month").innerHTML = dateArr[1];
document.getElementById("date").innerHTML = dateArr[2];

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3. Complete code

<!DOCTYPE html>
<html>
<head>
  <title>年月日平行展示</title>
</head>
<body>
  <table>
    <tr>
      <td>年：</td>
      <td id="year"></td>
    </tr>
    <tr>
      <td>月：</td>
      <td id="month"></td>
    </tr>
    <tr>
      <td>日：</td>
      <td id="date"></td>
    </tr>
  </table>

  <script type="text/javascript">
    var today = new Date();
    var dateArr = [];
    dateArr.push(today.getFullYear());
    dateArr.push(today.getMonth() + 1);
    dateArr.push(today.getDate());

    document.getElementById("year").innerHTML = dateArr[0];
    document.getElementById("month").innerHTML = dateArr[1];
    document.getElementById("date").innerHTML = dateArr[2];
  </script>
</body>
</html>

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4. Summary

Using the above ideas, we can easily achieve parallel display of year, month and day. In actual projects, we can also use CSS styles to beautify the layout of the table to make it more beautiful and easier to read. This also gives us more customization options.

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