blocks|key|1314970|text|if+(A+%7C%7C+B)+{+do+something+}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1314971|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>if (A || B) { do something }
</code></pre>


blocks|key|1314977|text|Use+the+%7C%7C+operator。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1314978|entityMap|0|LINK|mutability|MUTABLE|url|http://www.c-point.com/javascript_tutorial/jsoprOr.htm^0|8|2|0|J|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

<p><a href="http://www.c-point.com/javascript_tutorial/jsoprOr.htm" rel="noreferrer">Use the <code>||</code> operator</a>.</p>


blocks|key|1100024|text|只需使用the+logical+"OR"+operator，即%7C%7C。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1100025|if+(A+%7C%7C+B)|code-block|syntax|javascript|1100026|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_Operators#Logical_OR^0|V|2|4|P|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

<p>Simply use <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Logical_Operators#Logical_OR" rel="noreferrer">the logical "OR" operator</a>, that is <code>||</code>.</p>

<pre><code>if (A || B)
</code></pre>


blocks|key|1100050|text|%7C%7C是or运算符。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1100051|if(A+%7C%7C+B){+do+something+}|code-block|syntax|javascript|1100052|entityMap^0|0|2|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

<p><code>||</code> is the or operator.</p>

<pre><code>if(A || B){ do something }
</code></pre>


blocks|key|1315086|text|只需使用%7C%7C即可|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1315087|if+(A+%7C%7C+B)+{+your+action+here+}|code-block|syntax|javascript|1315088|注:使用字符串和数字。这就更复杂了。|1315089|查看this了解更深层次的内容：|1315090|entityMap|0|LINK|mutability|MUTABLE|url|http://addyosmani.com/blog/exploring-javascripts-logical-or-operator/^0|4|2|0|0|0|2|4|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|11|8|@]|D|@$9|12|A|13|1|14]]|E|$]]|$1|O|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

<p>Just use <code>||</code></p>

<pre><code>if (A || B) { your action here }
</code></pre>

<p>Note: with string and number. It's more complicated.</p>

<p>Check <a href="http://addyosmani.com/blog/exploring-javascripts-logical-or-operator/" rel="nofollow">this</a> for deep understading: </p>


blocks|key|1100129|text|下面是我的例子：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1100130|if(userAnswer==="Yes"%7C%7C"yes"%7C%7C"YeS"){
+console.log("Too+Bad!");+++
}|code-block|syntax|javascript|1100131|这就是说，如果答案是Yes或yes，那么同样的事情也会发生|1100132|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

<p>here is my example:</p>

<pre><code>if(userAnswer==="Yes"||"yes"||"YeS"){
 console.log("Too Bad!");   
}
</code></pre>

<p>This says that if the answer is Yes yes or YeS than the same thing will happen</p>


blocks|key|1315140|text|如果条件和表示法为%7C%7C，则需要多个条件语句才能使用OR(%7C%7C)运算符。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1315141|if(condition+%7C%7C+condition){+
+++some+stuff
}|code-block|syntax|javascript|1315142|entityMap^0|9|2|P|6|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

<p>More then one condition statement is needed to use <code>OR(||)</code> operator in if conditions and notation is <code>||</code>.</p>

<pre><code>if(condition || condition){ 
   some stuff
}
</code></pre>


blocks|key|1315159|text|您可以使用Like|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1315160|if(condition1+%7C%7C+condition2+%7C%7C+condition3+%7C%7C+..........)
{+++++++
+++++enter+code+here
}|code-block|syntax|javascript|1315161|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|$]]

<p>You can use Like</p>

<pre><code>if(condition1 || condition2 || condition3 || ..........)
{       
     enter code here
}
</code></pre>


blocks|key|1315229|text|你也可以使用regular+expressions：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1315230|​|1315231|var+thingToTest+=+"B";
if+(/A%7CB/.test(thingToTest))+alert("Do+something!")|code-block|syntax|javascript|1315232|1315233|下面是一个常规正则表达式的示例：|1315234|1315235|var+myString+=+"This+is+my+search+subject"
if+(/my/.test(myString))+alert("Do+something+here!")|1315236|1315237|这将在变量"myString“中查找"my”。您可以直接用字符串替换"myString“变量。|1315238|作为一个额外的好处，你可以将不区分大小写的"i“和全局的"g”添加到搜索中。|1315239|1315240|var+myString+=+"This+is+my+search+subject"
if+(/my/ig.test(myString))+alert("Do+something+here");|1315241|1315242|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions^0|6|J|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@$A|18|B|19|1|1A]]|C|$]]|$1|D|3|E|5|6|7|1B|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|1C|8|@]|9|@]|C|$I|J]]|$1|K|3|E|5|6|7|1D|8|@]|9|@]|C|$]]|$1|L|3|M|5|6|7|1E|8|@]|9|@]|C|$]]|$1|N|3|E|5|6|7|1F|8|@]|9|@]|C|$]]|$1|O|3|P|5|H|7|1G|8|@]|9|@]|C|$I|J]]|$1|Q|3|E|5|6|7|1H|8|@]|9|@]|C|$]]|$1|R|3|S|5|6|7|1I|8|@]|9|@]|C|$]]|$1|T|3|U|5|6|7|1J|8|@]|9|@]|C|$]]|$1|V|3|E|5|6|7|1K|8|@]|9|@]|C|$]]|$1|W|3|X|5|H|7|1L|8|@]|9|@]|C|$I|J]]|$1|Y|3|E|5|6|7|1M|8|@]|9|@]|C|$]]|$1|Z|3|-4|5|6|7|1N|8|@]|9|@]|C|$]]]|10|$11|$5|12|13|14|C|$15|16]]]]

<p>One can use <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions" rel="nofollow noreferrer">regular expressions</a>, too:</p>

<p><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 thingToTest = "B";
if (/A|B/.test(thingToTest)) alert("Do something!")</code></pre>
</div>
</div>
</p>

<p>Here's an example of regular expressions in general:</p>

<p><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 myString = "This is my search subject"
if (/my/.test(myString)) alert("Do something here!")</code></pre>
</div>
</div>
</p>

<p>This will look for "my" within the variable "myString".  You can substitute a string directly in place of the "myString" variable.</p>

<p>As an added bonus you can add the case insensitive "i" and the global "g" to the search as well.</p>

<p><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 myString = "This is my search subject"
if (/my/ig.test(myString)) alert("Do something here");</code></pre>
</div>
</div>
</p>


blocks|key|1100321|text|如果我们要提到正则表达式，我们不妨提到switch+statement。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1100322|​|1100323|var+expr+=+'Papayas';
switch+(expr)+{
++case+'Oranges':
++++console.log('Oranges+are+$0.59+a+pound.');
++++break;
++case+'Mangoes':
++case+'Papayas':+//+Mangoes+or+papayas
++++console.log('Mangoes+and+papayas+are+$2.79+a+pound.');
++++//+expected+output:+"Mangoes+and+papayas+are+$2.79+a+pound."
++++break;
++default:
++++console.log('Sorry,+we+are+out+of+'+%2B+expr+%2B+'.');
}|code-block|syntax|javascript|1100324|1100325|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/switch^0|J|6|J|G|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@$9|Y|A|Z|1|10]]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|13|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]]]

<p>If we're going to mention regular expressions, we might as well mention the <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/switch" rel="nofollow noreferrer"><code>switch</code> statement</a>.</p>

<p><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 expr = 'Papayas';
switch (expr) {
  case 'Oranges':
    console.log('Oranges are $0.59 a pound.');
    break;
  case 'Mangoes':
  case 'Papayas': // Mangoes or papayas
    console.log('Mangoes and papayas are $2.79 a pound.');
    // expected output: "Mangoes and papayas are $2.79 a pound."
    break;
  default:
    console.log('Sorry, we are out of ' + expr + '.');
}</code></pre>
</div>
</div>
</p>


<p>I understand that in JavaScript you can write:</p>

<pre><code>if (A &amp;&amp; B) { do something }
</code></pre>

<p>But how do I implement an OR such as:</p>

<pre><code>if (A OR B) { do something }
</code></pre>


How to use OR condition in a JavaScript IF statement?

我知道在JavaScript中你可以这样写：if (A && B) { do something }但是，我如何实现这样的OR：if (A OR B) { do something }

问如何在JavaScript IF语句中使用OR条件？
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