Try:

var objDate = new Date("10/11/2009");

var strDate =
    objDate.toLocaleString("en", { day: "numeric" }) + ' ' +
    objDate.toLocaleString("en", { month: "long"  }) + ' ' +
    objDate.toLocaleString("en", { year: "numeric"});

Date.prototype.getMonthName = function() {
    var monthNames = [ "January", "February", "March", "April", "May", "June", 
                       "July", "August", "September", "October", "November", "December" ];
    return monthNames[this.getMonth()];
}

它可以被用作

var month_Name = new Date().getMonthName();

另一种格式化日期的方法

new Date().toLocaleString('en-us',{month:'long', year:'numeric', day:'numeric'}) //output: "May 21, 2019"

将名称存储在一个数组中，并根据月份的索引进行查找。

var month=new Array(12);
month[0]="January";
month[1]="February";
month[2]="March";
month[3]="April";
month[4]="May";
month[5]="June";
month[6]="July";
month[7]="August";
month[8]="September";
month[9]="October";
month[10]="November";
month[11]="December";

document.write("The current month is " + month[d.getMonth()]);

JavaScript getMonth()方法

如果我们需要传递输入，那么我们需要使用以下方式

输入:“2020-12-28”

代码:

new Date('2020-12-28').toLocaleString('en-us',{month:'short', year:'numeric'})

输出:“2020年12月”

您可以使用几种可用的日期格式化程序之一。因为这属于JavaScript规范，所以它可以在浏览器和服务器端模式下使用。

objDate.toString().split(" ")[1]; // gives short name, unsure about locale 
objDate.toLocaleDateString.split(" ")[0]; // gives long name

e.g.

js> objDate = new Date(new Date() - 9876543210)
Mon Feb 04 2013 12:37:09 GMT-0800 (PST)
js> objDate.toString().split(" ")[1]
Feb
js> objDate.toLocaleString().split(" ")[0]
February

更多信息请访问https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date