blocks|key|1010352|text|您可能需要这样(使其类似于普通的CSS背景图像声明)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1010353|$('myObject').css('background-image',+'url('+%2B+imageUrl+%2B+')');|code-block|syntax|javascript|1010354|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|$]]

You probably want this (to make it like a normal CSS background-image declaration):

<pre><code>$('myObject').css('background-image', 'url(' + imageUrl + ')');
</code></pre>

blocks|key|3512312|text|您需要在imageUrl前后包含双引号(")，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3512313|$('myOjbect').css('background-image',+'url("'+%2B+imageUrl+%2B+'")');|code-block|syntax|javascript|3512314|这样，如果图像有空格，它仍将被设置为属性。|3512315|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|$]]

You'll want to include double quotes (") before and after the imageUrl like this:

<pre><code>$('myOjbect').css('background-image', 'url("' + imageUrl + '")');
</code></pre>

This way, if the image has spaces it will still be set as a property.

blocks|key|1015104|text|与其他人正确的建议不同，我发现切换CSS类通常比切换单独的CSS设置(特别是背景图像URL)更容易。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1015105|//+in+CSS+
.bg1+
{
++background-image:+url(/some/image/url/here.jpg);
}

.bg2+
{
++background-image:+url(/another/image/url/there.jpg);
}

//+in+JS
//+based+on+value+of+imageUrl,+determine+what+class+to+remove+and+what+class+to+add.
$('myOjbect').removeClass('bg1').addClass('bg2');|code-block|syntax|javascript|1015106|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|$]]

Alternatively to what the others are correctly suggesting, I find it easier usually to toggle CSS classes, instead of individual CSS settings (especially background image URLs). For example: 

<pre><code>// in CSS 
.bg1 
{
 background-image: url(/some/image/url/here.jpg);
}

.bg2 
{
 background-image: url(/another/image/url/there.jpg);
}

// in JS
// based on value of imageUrl, determine what class to remove and what class to add.
$('myOjbect').removeClass('bg1').addClass('bg2');
</code></pre>

blocks|key|4360016|text|对于其他答案，您也可以使用"background“。当您要设置与背景使用图像的方式相关的其他属性时，这尤其有用，例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4360017|$("myObject").css("background",+"transparent+url('"%2BimageURL%2B"')+no-repeat+right+top");|code-block|syntax|javascript|4360018|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|$]]

Further to the other answers, you can also use "background". This is particularly useful when you want to set other properties relating to the way the image is used by the background, such as:

<pre><code>$("myObject").css("background", "transparent url('"+imageURL+"') no-repeat right top");
</code></pre>

blocks|key|295212|text|对于那些使用实际URL而不是变量的用户：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|295213|$('myObject').css('background-image',+'url(../../example/url.html)');|code-block|syntax|javascript|295214|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|$]]

For those using an actual URL and not a variable:

<pre><code>$('myObject').css('background-image', 'url(../../example/url.html)');
</code></pre>

blocks|key|1010599|text|字符串插值来解救。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1010600|let+imageUrl+=+'imageurl.png';
$('myOjbect').css('background-image',+`url(${imageUrl})`);|code-block|syntax|javascript|1010601|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|$]]

String interpolation to the rescue.

<pre><code>let imageUrl = 'imageurl.png';
$('myOjbect').css('background-image', `url(${imageUrl})`);
</code></pre>

blocks|key|4360089|text|尝试修改"style“属性：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4360090|$('myObject').attr('style',+'background-image:+url("'+%2B+imageUrl+%2B'")');|code-block|syntax|javascript|4360091|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|$]]

Try modifying the "style" attribute:

<pre><code>$('myObject').attr('style', 'background-image: url("' + imageUrl +'")');
</code></pre>

blocks|key|1010617|text|我遇到的问题是，我一直在url()值的末尾添加一个分号;，这会阻止代码正常工作。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1010618|：❌不工作的代码|BOLD|1010619|$('#image_element').css('background-image',+'url(http://example.com/img.jpg);');
//--------------------------------------------------------------------------%5E|code-block|syntax|javascript|1010620|工作代码：✅|1010621|$('#image_element').css('background-image',+'url(http://example.com/img.jpg)');|1010622|请注意工作代码末尾省略的分号;。我只是不知道正确的语法，真的很难注意到它。希望这能帮助其他处于同样境地的人。|1010623|entityMap^0|C|5|R|1|0|2|6|0|0|0|6|0|0|0|1I|E|1|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]|$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|10|8|@$9|11|A|12|B|H]]|D|@]|E|$]]|$1|I|3|J|5|K|7|13|8|@]|D|@]|E|$L|M]]|$1|N|3|O|5|6|7|14|8|@$9|15|A|16|B|H]]|D|@]|E|$]]|$1|P|3|Q|5|K|7|17|8|@]|D|@]|E|$L|M]]|$1|R|3|S|5|6|7|18|8|@$9|19|A|1A|B|H]|$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|T|3|-4|5|6|7|1D|8|@]|D|@]|E|$]]]|U|$]]

The problem I was having, is that I kept adding a semi-colon <code>;</code> at the end of the <code>url()</code> value, which prevented the code from working.
❌ NOT WORKING CODE:
<pre class="lang-js prettyprint-override"><code>$('#image_element').css('background-image', 'url(http://example.com/img.jpg);');
//--------------------------------------------------------------------------^</code></pre>
✅ WORKING CODE:
<pre><code>$('#image_element').css('background-image', 'url(http://example.com/img.jpg)');
</code></pre>
Notice the omitted semi-colon <code>;</code> at the end in the working code. I simply didn't know the correct syntax, and it's really hard to notice it. Hopefully this helps someone else in the same boat.

blocks|key|1010633|text|不要忘记，jQuery+css函数允许传递对象，这允许您同时设置多个项。然后，回答的代码将如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1010634|$(this).css({'background-image':'url('+%2B+imageUrl+%2B+')'})|offset|length|style|CODE|1010635|entityMap^0|0|0|1L|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Don't forget that the jQuery css function allows objects to be passed which allows you to set multiple items at the same time. The answered code would then look like this:

<code>$(this).css({'background-image':'url(' + imageUrl + ')'})</code>

I have an image URL in a <code>imageUrl</code> variable and I am trying to set it as CSS style, using jQuery:

<pre><code>$('myObject').css('background-image', imageUrl);
</code></pre>

This seems to be not working, as:

<pre><code>console.log($('myObject').css('background-image'));
</code></pre>

returns <code>none</code>.

Any idea, what I am doing wrong?

Setting background-image using jQuery CSS property

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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我在一个CSS变量中有一个图像URL，我正在尝试使用jQuery将其设置为imageUrl样式：$('myObject').css('background-image', imageUrl);这似乎不起作用，因为：console.log($('myObject').css('background-image'));返回...

问使用jQuery CSS属性设置背景图像
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