每个部分的菜单颜色不同/

时间：2015-07-07 16:10:43

标签： javascript jquery html css

如果在滚动条移动到新div ID或单击菜单项并向下滚动到新ID后，如何更改菜单颜色？

我正在一个单页网站上工作，我已经在我的网页上使用滚动到部分ID。我想让菜单改变每个部分ID的颜色。

如何使用Jquery进行此操作？ Here is an example

这是我的HTML代码：

    <body>
            <div id="cssmenu-holder"><div id='cssmenu' class="align-center">
                <ul>
                   <li><a href='#'>Hem</a></li>
                   <li><a href='#'>Om spelet</a></li>
                   <li><a href='#'>Regler</a></li>
                   <li><a href='#'>Köp spelet</a></li>
                   <li><a href='#'>Kontakta oss</a></li>
                </ul>
            </div> </div>
        <!-- Banner -->
            <div id="banner" class="col-lg-12">
                Banner here 
            </div>
            <section id="about">
                    about the game
                </section>

            <!-- rules -->
                <section id="rules" class="style-bg">
                    Find the rules here
                </section>

                <!-- om -->
                <section id="buy" class="">
                    Buy something
                </section>

            <!-- contact -->
                <section id="contact" class="style-bg">
                    Contact me
                </section>

        <!-- Footer -->
            <footer id="footer">
                INFO
            </footer>

</body>

这是我的菜单的css代码：

    @import url(http://fonts.googleapis.com/css?family=Open+Sans);
#cssmenu-holder {
    z-index: 9999; position: fixed; left: 0; top: 0; width: 100%;
}
#cssmenu,
#cssmenu ul,
#cssmenu ul li,
#cssmenu ul li a,
#cssmenu #menu-button {
  margin: 0;
  padding: 0;
  border: 0;
  list-style: none;
  line-height: 1;
  display: block;
  position: relative;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;

}
#cssmenu.align-center > ul {
  font-size: 0;
  text-align: center;
}
#cssmenu:after,
#cssmenu > ul:after {
  content: ".";
  display: block;
  clear: both;
  visibility: hidden;
  line-height: 0;
  height: 0;
}
#cssmenu #menu-button {
  display: none;
}
#cssmenu {
  width: auto;
  font-family: 'Open Sans', sans-serif;
  line-height: 1;
  background: #2e8be6;
}
#menu-line {
  position: absolute;
  top: 0;
  left: 0;
  height: 3px;
  background: #fff;
  -webkit-transition: all 0.25s ease-out;
  -moz-transition: all 0.25s ease-out;
  -ms-transition: all 0.25s ease-out;
  -o-transition: all 0.25s ease-out;
  transition: all 0.25s ease-out;
}
#cssmenu > ul > li {
  float: left;
}
#cssmenu.align-center > ul {
  font-size: 0;
  text-align: center;
}
#cssmenu.align-center > ul > li {
  display: inline-block;
  float: none;
}
#cssmenu.align-center ul ul {
  text-align: left;
}
#cssmenu.align-right > ul > li {
  float: right;
}
#cssmenu.align-right ul ul {
  text-align: right;
}
#cssmenu > ul > li > a {
  padding: 20px;
  font-size: 12px;
  text-decoration: none;
  text-transform: uppercase;
  color: #fff;
  -webkit-transition: color .2s ease;
  -moz-transition: color .2s ease;
  -ms-transition: color .2s ease;
  -o-transition: color .2s ease;
  transition: color .2s ease;
}
#cssmenu > ul > li:hover > a,
#cssmenu > ul > li.active > a {
  color: #fff;
}
#cssmenu > ul > li.has-sub > a {
  padding-right: 25px;
}
#cssmenu > ul > li.has-sub > a::after {
  position: absolute;
  top: 21px;
  right: 10px;
  width: 4px;
  height: 4px;
  border-bottom: 1px solid #000000;
  border-right: 1px solid #000000;
  content: "";
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
  -webkit-transition: border-color 0.2s ease;
  -moz-transition: border-color 0.2s ease;
  -ms-transition: border-color 0.2s ease;
  -o-transition: border-color 0.2s ease;
  transition: border-color 0.2s ease;
}
#cssmenu > ul > li.has-sub:hover > a::after {
  border-color: #009ae1;
}
#cssmenu ul ul {
  position: absolute;
  left: -9999px;
}
#cssmenu li:hover > ul {
  left: auto;
}
#cssmenu.align-right li:hover > ul {
  right: 0;
}
#cssmenu ul ul ul {
  margin-left: 100%;
  top: 0;
}
#cssmenu.align-right ul ul ul {
  margin-left: 0;
  margin-right: 100%;
}
#cssmenu ul ul li {
  height: 0;
  -webkit-transition: height .2s ease;
  -moz-transition: height .2s ease;
  -ms-transition: height .2s ease;
  -o-transition: height .2s ease;
  transition: height .2s ease;
}
#cssmenu ul li:hover > ul > li {
  height: 32px;
}
#cssmenu ul ul li a {
  padding: 10px 20px;
  width: 160px;
  font-size: 12px;
  background: #fff;
  text-decoration: none;
  color: #dddddd;
  -webkit-transition: color .2s ease;
  -moz-transition: color .2s ease;
  -ms-transition: color .2s ease;
  -o-transition: color .2s ease;
  transition: color .2s ease;
}
#cssmenu ul ul li:hover > a,
#cssmenu ul ul li a:hover {
  color: #ffffff;
}
#cssmenu ul ul li.has-sub > a::after {
  position: absolute;
  top: 13px;
  right: 10px;
  width: 4px;
  height: 4px;
  border-bottom: 1px solid #dddddd;
  border-right: 1px solid #dddddd;
  content: "";
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
  -webkit-transition: border-color 0.2s ease;
  -moz-transition: border-color 0.2s ease;
  -ms-transition: border-color 0.2s ease;
  -o-transition: border-color 0.2s ease;
  transition: border-color 0.2s ease;
}
#cssmenu.align-right ul ul li.has-sub > a::after {
  right: auto;
  left: 10px;
  border-bottom: 0;
  border-right: 0;
  border-top: 1px solid #dddddd;
  border-left: 1px solid #dddddd;
}
#cssmenu ul ul li.has-sub:hover > a::after {
  border-color: #ffffff;
}
@media all and (max-width: 768px), only screen and (-webkit-min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min--moz-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (-o-min-device-pixel-ratio: 2/1) and (max-width: 1024px), only screen and (min-device-pixel-ratio: 2) and (max-width: 1024px), only screen and (min-resolution: 192dpi) and (max-width: 1024px), only screen and (min-resolution: 2dppx) and (max-width: 1024px) {
  #cssmenu {
    width: 100%;
  }
  #cssmenu ul {
    width: 100%;
    display: none;
  }
  #cssmenu.align-center > ul,
  #cssmenu.align-right ul ul {
    text-align: left;
  }
  #cssmenu ul li,
  #cssmenu ul ul li,
  #cssmenu ul li:hover > ul > li {
    width: 100%;
    height: auto;
    border-top: 1px solid rgba(120, 120, 120, 0.15);
  }
  #cssmenu ul li a,
  #cssmenu ul ul li a {
    width: 100%;
  }
  #cssmenu > ul > li,
  #cssmenu.align-center > ul > li,
  #cssmenu.align-right > ul > li {
    float: none;
    display: block;
  }
  #cssmenu ul ul li a {
    padding: 20px 20px 20px 30px;
    font-size: 12px;
    color: #000000;
    background: none;
  }
  #cssmenu ul ul li:hover > a,
  #cssmenu ul ul li a:hover {
    color: #000000;
  }
  #cssmenu ul ul ul li a {
    padding-left: 40px;
  }
  #cssmenu ul ul,
  #cssmenu ul ul ul {
    position: relative;
    left: 0;
    right: auto;
    width: 100%;
    margin: 0;
  }
  #cssmenu > ul > li.has-sub > a::after,
  #cssmenu ul ul li.has-sub > a::after {
    display: none;
  }
  #menu-line {
    display: none;
  }
  #cssmenu #menu-button {
    display: block;
    padding: 20px;
    color: #000000;
    cursor: pointer;
    font-size: 12px;
    text-transform: uppercase;
  }
  #cssmenu #menu-button::after {
    content: '';
    position: absolute;
    top: 20px;
    right: 20px;
    display: block;
    width: 15px;
    height: 2px;
    background: #000000;
  }
  #cssmenu #menu-button::before {
    content: '';
    position: absolute;
    top: 25px;
    right: 20px;
    display: block;
    width: 15px;
    height: 3px;
    border-top: 2px solid #000000;
    border-bottom: 2px solid #000000;
  }
  #cssmenu .submenu-button {
    position: absolute;
    z-index: 10;
    right: 0;
    top: 0;
    display: block;
    border-left: 1px solid rgba(120, 120, 120, 0.15);
    height: 52px;
    width: 52px;
    cursor: pointer;
  }
  #cssmenu .submenu-button::after {
    content: '';
    position: absolute;
    top: 21px;
    left: 26px;
    display: block;
    width: 1px;
    height: 11px;
    background: #000000;
    z-index: 99;
  }
  #cssmenu .submenu-button::before {
    content: '';
    position: absolute;
    left: 21px;
    top: 26px;
    display: block;
    width: 11px;
    height: 1px;
    background: #000000;
    z-index: 99;
  }
  #cssmenu .submenu-button.submenu-opened:after {
    display: none;
  }
}

2 个答案:

答案 0 :(得分：1)

这是如何在某些滚动位置上向元素添加类的小提琴。

用基本的jquery完成它。

fiddle

JS：

$(window).scroll(function() {    
    var scroll = $(window).scrollTop();

    if (scroll >= 500) {
        $(".header").addClass("active");
    } else {
        $(".header").removeClass("active");
    }
});

答案 1 :(得分：0)

您可以使用isElementVisible函数检查元素是否在视口中。

function isElementVisible(elementToBeChecked) {
    var TopView = $(window).scrollTop();
    var BotView = TopView + $(window).height();
    var TopElement = $(elementToBeChecked).offset().top;
    var BotElement = TopElement + $(elementToBeChecked).height();
    return ((BotElement <= BotView) && (TopElement >= TopView));
}

您应该检查窗口滚动的时间。

完整的代码可以是这样的：

function isElementVisible(elementToBeChecked) {
    var TopView = $(window).scrollTop();
    var BotView = TopView + $(window).height();
    var TopElement = $(elementToBeChecked).offset().top;
    var BotElement = TopElement + $(elementToBeChecked).height();
    return ((BotElement <= BotView) && (TopElement >= TopView));
}

$(window).scroll(function () {
    var rules = isElementVisible("#rules");
    var buy = isElementVisible("#buy");
    var contact = isElementVisible("#contact");

    if (rules) $("#cssmenu-holder").css("background", "red");
    if (buy) $("#cssmenu-holder").css("background", "blue");
    if (contact) $("#cssmenu-holder").css("background", "green");

});
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