blocks|key|900393|text|您可以在CSS文件中使用Media+Queries来满足您的需求。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|900394|@media+screen+and+(max-width:+300px)+{
++++nav+{
++++++++background-color:+#ffffff;
++++}
}|code-block|syntax|javascript|900395|entityMap|0|LINK|mutability|MUTABLE|url|https://www.w3schools.com/css/css3_mediaqueries_ex.asp^0|C|D|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]]]]

<p>You can use <a href="https://www.w3schools.com/css/css3_mediaqueries_ex.asp" rel="nofollow noreferrer">Media Queries</a> in your CSS file for what you need.</p>

<pre><code>@media screen and (max-width: 300px) {
    nav {
        background-color: #ffffff;
    }
}
</code></pre>


blocks|key|611385|text|由于仅在单击时更改颜色，因此不需要window.resize()事件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|611386|<script>
++++$("#myNavbar").click(function+()+{
++++++++windowsize+=+$(window).width();

++++++++if+(windowsize+<+440)+{
++++++++++++$(".navbar-header").css({"background-color":+"#ffffff",+"-webkit-box-shadow":+"0px+1px+4px+0px+rgba(180,+180,+180,+0.5)",+"-moz-box-shadow":+"0px+1px+4px+0px+rgba(180,180,180,+0.5)",+"box-shadow":+"0px+1px+4px+0px+rgba(180,180,180,+0.5)"});
++++++++}
++++});

</script>|code-block|syntax|javascript|611387|不过，我建议将动态CSS也改为使用类。JS将更改为$(".navbar-header").addClass("active");，您可以在您的css文件中定义活动类。|offset|length|style|CODE|611388|entityMap^0|0|0|P|13|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

<p>Since you are only changing the color on click, you don't need a window.resize() event.</p>

<pre><code>&lt;script&gt;
    $("#myNavbar").click(function () {
        windowsize = $(window).width();

        if (windowsize &lt; 440) {
            $(".navbar-header").css({"background-color": "#ffffff", "-webkit-box-shadow": "0px 1px 4px 0px rgba(180, 180, 180, 0.5)", "-moz-box-shadow": "0px 1px 4px 0px rgba(180,180,180, 0.5)", "box-shadow": "0px 1px 4px 0px rgba(180,180,180, 0.5)"});
        }
    });

&lt;/script&gt;
</code></pre>

<p>I would suggest changing the dynamic CSS to use a class though too. The JS would change to <code>$(".navbar-header").addClass("active");</code> and you can define the active class in your css files.</p>


blocks|key|611413|text|大致就像这样，当res低于440时，点击导航栏将是白色的:-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|611414|​|611415|<script>
++++++$('.navbar').click(function()+{
+++++++++++$(this).toggleClass('open');
++++++});
</script>|code-block|syntax|javascript|611416|@media+only+screen+and+(max-width:+440px)+{
++++.navbar.open+{
++++++background-color:+#ffffff;
++++++-webkit-box-shadow:+0px+1px+4px+0px+rgba(180,+180,+180,+0.5);
++++++-moz-box-shadow:+0px+1px+4px+0px+rgba(180,180,180,+0.5);
++++++box-shadow:+0px+1px+4px+0px+rgba(180,180,180,+0.5);
++++}
}|611417|<div+class="navbar"></div>|611418|611419|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>Roughly like this, on click when res is less than 440 the navbar will be white :-</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>&lt;script&gt;
      $('.navbar').click(function() {
           $(this).toggleClass('open');
      });
&lt;/script&gt;</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>@media only screen and (max-width: 440px) {
    .navbar.open {
      background-color: #ffffff;
      -webkit-box-shadow: 0px 1px 4px 0px rgba(180, 180, 180, 0.5);
      -moz-box-shadow: 0px 1px 4px 0px rgba(180,180,180, 0.5);
      box-shadow: 0px 1px 4px 0px rgba(180,180,180, 0.5);
    }
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div class="navbar"&gt;&lt;/div&gt;</code></pre>
</div>
</div>
</p>


blocks|key|4395060|text|使用媒体查询是使css属性依赖于屏幕大小的最佳方式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4395061|以下是一些可能适合您的需求的代码：|4395062|.nav-bar+{
++++@media+only+screen+and+(max-width:+420px)+{background:#fff;}
}|code-block|syntax|javascript|4395063|如果屏幕宽度小于或等于420px，这将使导航栏变为白色。|4395064|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<p>Using media queries is the best way to make a css property dependent on the screen size.</p>

<p>Here is some code that might suit your needs:</p>

<pre><code>.nav-bar {
    @media only screen and (max-width: 420px) {background:#fff;}
}
</code></pre>

<p>This makes the nav-bar white if the screen width is 420px or less.</p>


blocks|key|900452|text|尝试以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|900453|​|900454|$("#myNavbar").click(function+()+{
++$(".navbar-header").addClass("navbar-header-mobile");
});|code-block|syntax|javascript|900455|/*+Extra+Small+Devices,+Phones+*/+
++++@media+only+screen+and+(min-width+:+480px)+{
++++++.navbar-header-mobile+{
++++++++background-color:+#ffffff;
++++++++-webkit-box-shadow:+0px+1px+4px+0px+rgba(180,+180,+180,+0.5);
++++++++-moz-box-shadow:+0px+1px+4px+0px+rgba(180,180,180,+0.5);
++++++++box-shadow:+0px+1px+4px+0px+rgba(180,180,180,+0.5);
++++++}
++++}|900456|<script+src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>|900457|900458|如果你想要的话，你只需要在手机上添加一些东西来删除它。|900459|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|K|3|L|5|F|7|V|8|@]|9|@]|A|$G|H]]|$1|M|3|C|5|6|7|W|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|X|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|Q|$]]

<p>Try the following:</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>$("#myNavbar").click(function () {
  $(".navbar-header").addClass("navbar-header-mobile");
});</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>/* Extra Small Devices, Phones */ 
    @media only screen and (min-width : 480px) {
      .navbar-header-mobile {
        background-color: #ffffff;
        -webkit-box-shadow: 0px 1px 4px 0px rgba(180, 180, 180, 0.5);
        -moz-box-shadow: 0px 1px 4px 0px rgba(180,180,180, 0.5);
        box-shadow: 0px 1px 4px 0px rgba(180,180,180, 0.5);
      }
    }</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;</code></pre>
</div>
</div>
</p>

<p>You just need to add something that removes it on the phone if you want.</p>


blocks|key|900464|text|我会通过JS中的类切换和CSS媒体查询来做到这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|900465|JS+-|900466|$("#myNavbar").click(function()+{
++++$(".navbar-header").toggleClass('.active-nav')
});|code-block|syntax|javascript|900467|CSS+-|900468|@media+only+screen+and+(min-width:440px)+{
++++.navbar-header.active-nav+{
++++++++background-color:+#ffffff;
++++++++-webkit-box-shadow:+0px+1px+4px+0px+rgba(180,+180,+180,+0.5);
++++++++-moz-box-shadow:+0px+1px+4px+0px+rgba(180,+180,+180,+0.5);
++++++++box-shadow:+0px+1px+4px+0px+rgba(180,+180,+180,+0.5);
++++}
}|900469|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

<p>I'd do this via a class toggle in JS and a CSS media query.</p>

<p>JS -</p>

<pre><code>$("#myNavbar").click(function() {
    $(".navbar-header").toggleClass('.active-nav')
});
</code></pre>

<p>CSS -</p>

<pre><code>@media only screen and (min-width:440px) {
    .navbar-header.active-nav {
        background-color: #ffffff;
        -webkit-box-shadow: 0px 1px 4px 0px rgba(180, 180, 180, 0.5);
        -moz-box-shadow: 0px 1px 4px 0px rgba(180, 180, 180, 0.5);
        box-shadow: 0px 1px 4px 0px rgba(180, 180, 180, 0.5);
    }
}
</code></pre>


blocks|key|4395131|text|解决了问题。这不仅仅是标题的颜色，我还需要改变可折叠菜单的背景。因此，我使用了与标题颜色相同的逻辑。捕获可折叠导航栏的点击功能并切换颜色。下面是我的最后一段代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4395132|<script>
++$(function+(){
++++$(".navbar-toggle").click(function()+{
++++++++if+($(window).width()+<+440)+{
++++++++++++$(".navbar-collapse").toggleClass("menuActive");
++++++++++++$(".navbar-header").toggleClass("menuActive");
++++++++}+

++++});
+++});+
</script>|code-block|syntax|javascript|4395133|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>Solved the issue. Its not just the header color, I needed to change the collapsible menu background as well. So I used the same logic I used for header color. Capturing the click function of the collapsible nav bar and toggling the colors. Here is my final piece of code:  </p>

<pre><code>&lt;script&gt;
  $(function (){
    $(".navbar-toggle").click(function() {
        if ($(window).width() &lt; 440) {
            $(".navbar-collapse").toggleClass("menuActive");
            $(".navbar-header").toggleClass("menuActive");
        } 

    });
   }); 
&lt;/script&gt;
</code></pre>


<p>I'm very new to front-end coding. I'm creating my own responsive website using Bootstrap 3. </p>

<p>When I resize my browser window to simulate the size of a phone screen, I want the nav bar color (nav header color?) to change to white on Menu Icon click. </p>

<p>I want it to stay transparent on page load and that is working. I want the header to change to white while scrolling and that is also working. When the hamburger menu icon is clicked, the collapsible nav header drops down to reveal the menu items, but the background remains transparent, causing the menu items to lay on top of the content below. </p>

<p>I wrote the following script but it doesn't seem to work. Does anyone have suggestions?</p>

<pre><code>&lt;script&gt;
    var windowsize = $(window).width();
    $(window).resize(funtion() {
        windowsize = $(window).width();
            if (windowsize &lt; 440) {
                $("#myNavbar").click(function () {
                  $(".navbar-header").css({"background-color": "#ffffff", "-webkit-box-shadow": "0px 1px 4px 0px rgba(180, 180, 180, 0.5)", "-moz-box-shadow": "0px 1px 4px 0px rgba(180,180,180, 0.5)", "box-shadow": "0px 1px 4px 0px rgba(180,180,180, 0.5)"});
                });
            };
      });
&lt;/script&gt;
</code></pre>


Change Navbar Header Color on Resize

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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我对前端编程非常陌生。我正在使用Bootstrap 3创建我自己的响应式网站。当我调整浏览器窗口的大小以模拟电话屏幕的大小时，我想要导航栏颜色(导航标题颜色？)要在菜单图标上更改为白色，请单击。我希望它在页面加载时保持透明，这是有效的。我希望标题改为白色，同时滚动，这也是工作。单击汉堡包菜单图标时，可折叠的导航标题下拉...

问调整大小时更改导航栏标题颜色
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