使用本月的月份在javascript中创建下拉列表

Question

我有一个“按月搜索”功能，并在下拉（选择）字段中列出了几个月。我希望仅在本月之前（包括本月）显示5年的月份。这是我到目前为止有：

var multiYears = [ "2015", "2016", "2017", "2018", "2019", "2020"]; 
var monthNames = [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ]; 
var htmlOptions = ""; 
var i; 
for (m = 0; m < multiYears.length; m++) { 
    var multiYear = multiYears[m]; 
    for (i = 0; i < 12; i++) { 
     var realMonth = i + 1;   
     htmlOptions += '<option value="' + ("0" + realMonth).slice(-2) + "-" + multiYear + '">' + monthNames[i] + " " + multiYear + '</option>'; 
    } 
} 

var htmlStart = '<select size="1" id="multiDrop" name="multiDrop">'; 
var htmlOptionsHeader = '<option value="_">Navigate by month</option>'; 
var htmlEnd ='</select>'; 
var html = htmlStart + htmlOptionsHeader + htmlOptions + htmlEnd; 

林添加此HTML我使用JavaScript页面，然后根据年份和月份，在这样的选择选项的值装入结果：01-2015，02- 2015年03月15日等，其中1月份是01（而不是0）

Answer 1

查看我的演示here。它显示今年9月份以及随后几年的所有月份。

var multiYears = [ "2015", "2016", "2017", "2018", "2019", "2020"]; 
var monthNames = [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ]; 
var htmlOptions = ""; 
var i; 


var currentDate = new Date(); 

for (m = 0; m < multiYears.length; m++) { 
    var multiYear = multiYears[m]; 
    var startMonth = 1; 
    // if it's the current year, only show from this month onwards 
    if (multiYear == currentDate.getYear() + 1900) { 
     startMonth = currentDate.getMonth() + 1; 
    } 

    for (i = startMonth ; i <= 12; i++) { 
     htmlOptions += '<option value="' + ("0" + i).slice(-2) + "-" + multiYear + '">' + monthNames[i - 1] + " " + multiYear + '</option>'; 
    } 
} 

var htmlStart = '<select size="1" id="multiDrop" name="multiDrop">'; 
var htmlOptionsHeader = '<option value="_">Navigate by month</option>'; 
var htmlEnd ='</select>'; 
var html = htmlStart + htmlOptionsHeader + htmlOptions + htmlEnd; 

document.body.innerHTML += html;