blocks|key|2164143|text|$(document).ready(function(){


$("#demo").click(function(){

+++$("#demo").css('background','red');+++

});

});



<div+id="demo">+test+</div>|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2164144|您可以简单地通过jquery需要添加jquery文件来完成它。|unstyled|2164145|<script+src="http://code.jquery.com/jquery-1.11.0.min.js"></script>|2164146|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>$(document).ready(function(){


$("#demo").click(function(){

   $("#demo").css('background','red');   

});

});



&lt;div id="demo"&gt; test &lt;/div&gt;
</code></pre>

<p>You can do it simply  by jquery need to add jquery file   latest </p>

<pre><code>&lt;script src="http://code.jquery.com/jquery-1.11.0.min.js"&gt;&lt;/script&gt;
</code></pre>


blocks|key|2164171|text|试试这段代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2164172|​|2164173|function+myFunction()+{
++if+(document.getElementById("demo").style.background)+{//<--+already+having+bg
++++document.getElementById("demo").style.background+=+"";//<--+remove+it
++}+else+{
++++document.getElementById("demo").style.background+=+"#ff77ee";
++}
}|code-block|syntax|javascript|2164174|<div+id="demo"+onclick="javascript:myFunction();">hi</div>|2164175|2164176|编辑|offset|length|style|BOLD|2164177|2164178|var+div+=+document.getElementById('demo');

var+myFunction+=+function()+{
++var+clas+=+div.className.split('+');
++var+i;
++if+(-1+===+(i+=+clas.indexOf('bg')))+{
++++clas.push('bg');
++}+else+{
++++clas.splice(i,+1);
++}
++div.className+=+clas.join("+");
};

myFunction();+//just+for+testing|2164179|.bg+{
++background:+pink+!important;
}
.brd+{
++border:+1px+solid+grey;
}
.pad+{
++padding:+5px+7px;
}
.bg2+{
++background:+orange;
}|2164180|<div+id="demo"+onclick="myFunction();"+class='brd+pad+bg2'>hi+there</div>|2164181|2164182|entityMap^0|0|0|0|0|0|0|2|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|13|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|K|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|16|8|@$N|17|O|18|P|Q]]|9|@]|A|$]]|$1|R|3|C|5|6|7|19|8|@]|9|@]|A|$]]|$1|S|3|T|5|F|7|1A|8|@]|9|@]|A|$G|H]]|$1|U|3|V|5|F|7|1B|8|@]|9|@]|A|$G|H]]|$1|W|3|X|5|F|7|1C|8|@]|9|@]|A|$G|H]]|$1|Y|3|C|5|6|7|1D|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]]|10|$]]

<p>Try this code.</p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>function myFunction() {
  if (document.getElementById("demo").style.background) {//&lt;-- already having bg
    document.getElementById("demo").style.background = "";//&lt;-- remove it
  } else {
    document.getElementById("demo").style.background = "#ff77ee";
  }
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="demo" onclick="javascript:myFunction();"&gt;hi&lt;/div&gt;</code></pre>
</div>
</div>
</p>

<p><strong>EDIT</strong></p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var div = document.getElementById('demo');

var myFunction = function() {
  var clas = div.className.split(' ');
  var i;
  if (-1 === (i = clas.indexOf('bg'))) {
    clas.push('bg');
  } else {
    clas.splice(i, 1);
  }
  div.className = clas.join(" ");
};

myFunction(); //just for testing</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>.bg {
  background: pink !important;
}
.brd {
  border: 1px solid grey;
}
.pad {
  padding: 5px 7px;
}
.bg2 {
  background: orange;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="demo" onclick="myFunction();" class='brd pad bg2'&gt;hi there&lt;/div&gt;</code></pre>
</div>
</div>
</p>


blocks|key|2164200|text|它是Javascript中的backgroundColor|type|ordered-list-item|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2164201|它是CSS中的background-color|2164202|您需要获得应用样式的计算样式。|2164203|unstyled|2164204|2164205|片段：|BOLD|2164206|​|2164207|var+elem+=+document.getElementById("demo");
var+c+=+window.getComputedStyle(elem).backgroundColor;
alert(c);|code-block|syntax|javascript|2164208|#demo{
++++background-color:+#f00;
++++width:+200px;
++++height:+200px;
}|2164209|<div+id="demo"+></div>|2164210|2164211|entityMap^0|E|F|0|7|G|0|0|0|0|0|3|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|19|8|@]|D|@]|E|$]]|$1|J|3|-4|5|K|7|1A|8|@]|D|@]|E|$]]|$1|L|3|-4|5|K|7|1B|8|@]|D|@]|E|$]]|$1|M|3|N|5|K|7|1C|8|@$9|1D|A|1E|B|O]]|D|@]|E|$]]|$1|P|3|Q|5|K|7|1F|8|@]|D|@]|E|$]]|$1|R|3|S|5|T|7|1G|8|@]|D|@]|E|$U|V]]|$1|W|3|X|5|T|7|1H|8|@]|D|@]|E|$U|V]]|$1|Y|3|Z|5|T|7|1I|8|@]|D|@]|E|$U|V]]|$1|10|3|Q|5|K|7|1J|8|@]|D|@]|E|$]]|$1|11|3|-4|5|K|7|1K|8|@]|D|@]|E|$]]]|12|$]]

<ol>
<li>It is <code>backgroundColor</code> in Javascript</li>
<li>It is <code>background-color</code> in CSS</li>
<li>You need to get computed style for applied styles</li>
</ol>

<p><strong><em>Snippet:</em></strong></p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var elem = document.getElementById("demo");
var c = window.getComputedStyle(elem).backgroundColor;
alert(c);</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>#demo{
    background-color: #f00;
    width: 200px;
    height: 200px;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="demo" &gt;&lt;/div&gt;</code></pre>
</div>
</div>
</p>


blocks|key|2589602|text|试试下面的代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2589603|function+myFunction()+{+
++++var+e+=+document.getElementById("demo");
++++var+c+=+window.getComputedStyle(e).backgroundColor;
++++if+(c+===+"rgb(0,+0,+0)")+{
++++document.getElementById("demo").style.background+=+"#ff77ee";
}+else{
++++document.getElementById("demo").style.background+=+"#000";
}
}|code-block|syntax|javascript|2589604|DEMO|offset|length|2589605|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/ovaqqgrr/1/^0|0|0|0|4|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

<p>Try this code:</p>

<pre><code>function myFunction() { 
    var e = document.getElementById("demo");
    var c = window.getComputedStyle(e).backgroundColor;
    if (c === "rgb(0, 0, 0)") {
    document.getElementById("demo").style.background = "#ff77ee";
} else{
    document.getElementById("demo").style.background = "#000";
}
}
</code></pre>

<h1><a href="http://jsfiddle.net/ovaqqgrr/1/" rel="nofollow"><strong>DEMO</strong></a></h1>


blocks|key|2589671|text|document.getElementById("demo").style.background|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2589672|这一行返回rgb颜色，例如：|unstyled|2589673|"rgb(255,+119,+238)"|2589674|所以你可以使用：|2589675|function+myFunction()+{+
++++if+(document.getElementById("header").style.background+==+"rgb(255,+119,+238)")+{
++++++++document.getElementById("header").style.background+=+"rgb(0,+0,+0)";
++++}+else{
++++++++document.getElementById("header").style.background+=+"rgb(255,+119,+238)";
++++}
}|2589676|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>document.getElementById("demo").style.background
</code></pre>

<p>This line return an rgb color, like :</p>

<pre><code>"rgb(255, 119, 238)"
</code></pre>

<p>So you can use :</p>

<pre><code>function myFunction() { 
    if (document.getElementById("header").style.background == "rgb(255, 119, 238)") {
        document.getElementById("header").style.background = "rgb(0, 0, 0)";
    } else{
        document.getElementById("header").style.background = "rgb(255, 119, 238)";
    }
}
</code></pre>


blocks|key|2164286|text|这是你的解决方案。我使用布尔变量和更少的代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2164287|​|2164288|var+bool+=+true;
function+myFunction()+{+
	
++++(bool)+?+document.getElementById("demo").style.background+=+"#ff77ee"+:++document.getElementById("demo").style.background+=+"black";
++++bool+=+!bool;

}|code-block|syntax|javascript|2164289|#demo{
++++background:+#000;
++++width:+200px;
++++height:+200px;
}|2164290|<div+id="demo"+onclick="javascript:myFunction();"></div>|2164291|2164292|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|R|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|K|3|L|5|F|7|T|8|@]|9|@]|A|$G|H]]|$1|M|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|O|$]]

<p>Here your solution. I use a boolean variable and less code.</p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var bool = true;
function myFunction() { 
	
    (bool) ? document.getElementById("demo").style.background = "#ff77ee" :  document.getElementById("demo").style.background = "black";
    bool = !bool;

}</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>#demo{
    background: #000;
    width: 200px;
    height: 200px;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="demo" onclick="javascript:myFunction();"&gt;&lt;/div&gt;</code></pre>
</div>
</div>
</p>


<p>I have a problem with a div changing background but i also need it to change back when the background color has been applied.</p>

<p>Code: JavaScript:</p>

<pre><code>function myFunction() { 
    if (document.getElementById("demo").style.background == "#ff77ee") {
    document.getElementById("demo").style.background = "#000";
} else{
    document.getElementById("demo").style.background = "#ff77ee";
}
}
</code></pre>

<p>Code: HTML:</p>

<pre><code>&lt;div id="demo" onclick="javascript:myFunction();"&gt;&lt;/div&gt;
</code></pre>

<p>Code: Style: ( Its in my Index File )</p>

<pre><code>#demo{
    background: #000;
    width: 200px;
    height: 200px;
}
</code></pre>

<p><strong>What i would like it to do is that i want to onclick change the background color to pink. then if i click on it again i would like the color to be the original color - Black.</strong></p>


onclick change background of div

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个问题，一个div变化的背景，但我也需要它改变回来时，背景颜色已被应用。代码: JavaScript：function myFunction() {     if (document.getElementById("demo").style.background == "#ff77ee") {    docume...

问点击更改div的背景
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问点击更改div的背景EN