setmonth
JavaScript日期setMonth()方法 (JavaScript Date setMonth() method)
setMonth() method is a Date class method, it is used to set the month to the Date object with a valid month value (between 0 to 11. 0 for January, 1 for February and so on).
setMonth()方法是Date類的一種方法，用于將月份設置為具有有效月份值的Date對象(0到11之間。1月為0，2月為1，依此類推)。
Note: Month value larger than the 11 will be truncated from the starting month value (0), for example, we are going to set 12 as month value, it will be truncated at 0 and January will be set.
注意：大于11的月份值將從開始的月份值(0)開始被截斷，例如，我們將12設置為月份值，將其截斷為0并設置一月 。
Syntax:
句法：
var dt = new Date();
dt.setMonth(month);
Examples:
例子：
Input/Date class object declaration:
var dt = new Date();
Function call to set the month:
dt.setMonth(2);
Function call to get the month:
dt.getMonth();
Output:
2
JavaScript code to demonstrate an example of Date.setMonth() method
JavaScript代碼演示Date.setMonth()方法的示例
<html>
<head><title>JavaScipt Example</title></head>
<body>
<script>
var dt = new Date();
//getting current month
var month = dt.getMonth();
//printing
document.write("month: " + month + "<br>");
//setting month to March (2)
dt.setMonth(2);
//getting & printing month again
month = dt.getMonth();
document.write("month: " + month + "<br>");
//setting invalid month
//setting month to 12
dt.setMonth(12);
//getting & printing month again
month = dt.getMonth();
document.write("month: " + month + "<br>");
</script>
</body>
</html>
Output
輸出量
month: 2
month: 2
month: 0
Reference: JavaScript setMonth() Method
參考： JavaScript setMonth()方法
翻譯自: https://www.includehelp.com/code-snippets/date-setMonth-method-with-example-in-javascript.aspx
setmonth
