JavaScript中的getDay怎么用
时间: 2023-06-10 17:05:00 浏览: 122
getDay() 是 JavaScript 中日期对象的方法,可以获得当前日期是星期几,返回结果为 0 表示星期日,1 表示星期一,以此类推,最大为 6,表示星期六。以下是一个示例:
```javascript
var now = new Date(); // 获取当前时间
var dayOfWeek = now.getDay(); // 获得星期几,返回 0 ~ 6,0 表示星期日
```
你可以根据需要将获取的星期几转换为文字表示,例如:
```javascript
var dayMap = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']; // 定义星期几数组
var now = new Date(); // 获取当前时间
var dayOfWeek = now.getDay(); // 获得星期几,返回 0 ~ 6,0 表示星期日
var dayOfWeekText = dayMap[dayOfWeek]; // 获得星期几的文字表示
console.log('Today is ' + dayOfWeekText); // 输出 Today is Tuesday
```
相关问题
用javaScript写一个日历
好的,这是一个简单的JavaScript代码可以创建一个日历:
```javascript
var date = new Date();
var year = date.getFullYear();
var month = date.getMonth() + 1;
// Create calendar table
var calendar = "<table><tr><th>日</th><th>一</th><th>二</th><th>三</th><th>四</th><th>五</th><th>六</th></tr>";
// Get the first day of the month
var firstDay = (new Date(year, month - 1, 1)).getDay();
// Determine the number of days in the month
var daysInMonth = new Date(year, month, 0).getDate();
// Create cells for each day of the month
var cells = "";
for (var i = 0; i < daysInMonth; i++) {
var day = i + 1;
if (i % 7 === 0) {
cells += "<tr>";
}
cells += "<td>" + day + "</td>";
if (i % 7 === 6) {
cells += "</tr>";
}
}
// Add cells to the calendar table
calendar += cells;
// Close the table
calendar += "</table>";
// Display the calendar
document.getElementById("calendar").innerHTML = calendar;
```
这个代码创建了一个基本的表格来表示一个日历。 数据获取和处理通过 JavaScript 的 Date 对象完成。您可以将此代码与您自己的 HTML 和 CSS一起使用来创建漂亮的日历。
用JavaScript实现日历表
Sure, I can help you with that! Here's an example of how to create a simple calendar using JavaScript:
```
// Get the current date
var today = new Date();
// Get the year and month
var year = today.getFullYear();
var month = today.getMonth();
// Create a table element for the calendar
var table = document.createElement('table');
// Create a header row for the calendar
var headerRow = document.createElement('tr');
// Create the cells for the header row
for (var i = 0; i < 7; i++) {
var cell = document.createElement('th');
cell.textContent = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'][i];
headerRow.appendChild(cell);
}
// Add the header row to the table
table.appendChild(headerRow);
// Create the cells for the calendar
for (var i = 0; i < 6; i++) {
var row = document.createElement('tr');
for (var j = 0; j < 7; j++) {
var cell = document.createElement('td');
// Calculate the date for this cell
var date = new Date(year, month, (i * 7) + j - today.getDay() + 1);
// Set the cell content to the date
cell.textContent = date.getDate();
// Add the cell to the row
row.appendChild(cell);
}
// Add the row to the table
table.appendChild(row);
}
// Add the table to the page
document.body.appendChild(table);
```
This code creates a simple table-based calendar that displays the current month. You can modify it to display other months or add more functionality as needed. Let me know if you have any questions!