blocks|key|72608|text|this.endDate+=+new+Date(this.endDate);+//+<=+maybe+you+get+a+string+date...
this.endDate.setMonth(this.endDate.getMonth()+%2B+12);
this.endDate.setDate(this.endDate.getDate()+-+1);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|72609|如果您从服务器或以前的Json格式获取数据，可能需要首先将其从string转换为Date：this.endDate+=+new+Date(this.endDate);。看起来这是你的案子。|unstyled|offset|length|style|CODE|72610|entityMap^0|0|V|6|14|4|19|12|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@$G|O|H|P|I|J]|$G|Q|H|R|I|J]|$G|S|H|T|I|J]]|9|@]|A|$]]|$1|K|3|-4|5|F|7|U|8|@]|9|@]|A|$]]]|L|$]]

<pre class="lang-js prettyprint-override"><code>this.endDate = new Date(this.endDate); // &lt;= maybe you get a string date...
this.endDate.setMonth(this.endDate.getMonth() + 12);
this.endDate.setDate(this.endDate.getDate() - 1);
</code></pre>

If you're getting your date from a server or from a previous Json format, maybe you need to convert it from <code>string</code> to <code>Date</code> first: <code>this.endDate = new Date(this.endDate);</code>. It seems this is your case.

blocks|key|2579619|text|这是一种提取你想要的日期的方法，应用这个变量，你就可以开始工作了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2579620|​|2579621|var+date+=+new+Date();+//+now+
var+newDate+=+new+Date(date.getFullYear()+%2B+1,+date.getMonth(),+date.getDate()+-+1);

console.log(newDate.toLocaleDateString());|code-block|syntax|javascript|2579622|2579623|this.valStartDate必须是有效的javascript日期，并且格式必须与new+Date();提供的格式相同。|offset|length|style|CODE|2579624|Fri+Apr+26+2019+11:52:15+GMT%2B0100+(British+Summer+Time)|2579625|entityMap^0|0|0|0|0|0|H|17|B|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|V|8|@]|9|@]|A|$G|H]]|$1|I|3|C|5|6|7|W|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|X|8|@$L|Y|M|Z|N|O]|$L|10|M|11|N|O]]|9|@]|A|$]]|$1|P|3|Q|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|R|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|S|$]]

Here is a method of abstracting the date you want, apply this the variable and you should be good to go.

<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var date = new Date(); // now 
var newDate = new Date(date.getFullYear() + 1, date.getMonth(), date.getDate() - 1);

console.log(newDate.toLocaleDateString());</code></pre>
</div>
</div>


<code>this.valStartDate.getFullYear()</code> In order for this to work, <code>this.valStartDate</code> must be a valid javascript date and look the same format as <code>new Date();</code> would give you.

<pre><code>Fri Apr 26 2019 11:52:15 GMT+0100 (British Summer Time)
</code></pre>

blocks|key|74535|text|确保给定的开始日期是日期，而不是字符串。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|74536|var+startDate+=+new+Date(2018,+0,+20);
var+startDatePlus12Months+=+new+Date(startDate.setMonth(startDate.getMonth()+%2B+12));
var+expectedDate+=+new+Date(startDatePlus12Months.getFullYear(),+startDatePlus12Months.getMonth(),+startDatePlus12Months.getDate()+-+1);|code-block|syntax|javascript|74537|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Ensure that your given start date is a date and not a string.

<pre><code>var startDate = new Date(2018, 0, 20);
var startDatePlus12Months = new Date(startDate.setMonth(startDate.getMonth() + 12));
var expectedDate = new Date(startDatePlus12Months.getFullYear(), startDatePlus12Months.getMonth(), startDatePlus12Months.getDate() - 1);
</code></pre>

blocks|key|2579627|text|在Moment.js的帮助下，这很容易实现|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2579628|const+startDate+=+moment('2018-01-20');
const+endDate+=+startDate.add(12,+'months').subtract(1,+'days').toDate();|code-block|syntax|javascript|2579629|entityMap|0|LINK|mutability|MUTABLE|url|http://momentjs.com/^0|1|9|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

This is easy with the help of <a href="http://momentjs.com/" rel="nofollow noreferrer">Moment.js</a>:

<pre><code>const startDate = moment('2018-01-20');
const endDate = startDate.add(12, 'months').subtract(1, 'days').toDate();
</code></pre>

<blockquote>
 Hi, I would like to add 12 months and subtract 1 day for my current
 date.
</blockquote>

Example :

<ol>
<li>valStartDate :2018-01-20</li>
<li>expected_date:2019-01-19</li>
</ol>

I try below code but error "getFullYear() not a function to allow"

<pre><code>this.endDate =this.valStartDate.getFullYear()+1+'-'+this.valStartDate.getMonth()+'-'+(this.valStartDate.getDate()-1);
</code></pre>

add 12 months for Now Date

服务器

您好，我想为当前日期添加12个月并减去1天。示例:valStartDate :2018-01-20expected_date:2019-01-19我尝试了下面的代码，但出现错误"getFullYear() a function to “this.endDate =this.valStartDate.getFullYea...

问为当前日期添加12个月
EN

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