如何阻止最大宽度被定位项忽略？

时间：2017-05-12 16:53:01

标签： html css css-position

我有一个悬停菜单，需要定位某些元素，但我无法将文本扩展到最大宽度。它只是将自己设置为最小宽度。

我将max-width设置为一个非常大的例子，但你可以看到它在Pages子菜单下被忽略了。

好像我删除li上的位置相对，文字换行，但这会影响我的菜单。

ul {
  padding-left: 0;
}

.toggle {
  font-weight: bold;
  cursor: pointer;
}

#shop-navigation .sub-menu,
#shop-navigation,
#shop-navigation [type="checkbox"]:checked~.sub-menu-toggle span,
.hidden-xs-up {
  display: none;
}

#shop-navigation .menu li {
  position: relative;
}

#shop-navigation a {
  display: block;
  padding: 0.5rem 4rem 0.5rem 15px;
  margin: 0 -15px;
}

#shop-navigation .menu .sub-menu-toggle {
  padding: 0.5rem;
  width: 3rem;
  position: absolute;
  right: 0;
  top: 0;
  border-left: 1px solid rgba(0, 0, 0, 0.1);
  text-align: center;
  height: 100%;
}

#shop-navigation .sub-menu a {
  background: #e8e8e8;
  padding-left: 30px;
}

#shop-navigation .sub-menu ul a {
  padding-left: 45px;
}

#shop-navigation [type="checkbox"]:checked~.sub-menu {
  display: block;
}

#shop-navigation [type="checkbox"]:checked~.sub-menu-toggle:before {
  content: "-";
}

@media (min-width: 768px) {
  #shop-navigation a {
    margin-left: -30px;
    margin-right: -30px;
  }
  #shop-navigation a {
    padding-left: 30px;
    padding-right: 4rem;
  }
  #shop-navigation .menu .sub-menu-toggle {
    width: 4rem;
  }
  #shop-navigation .sub-menu a {
    padding-left: 45px;
  }
  #shop-navigation .sub-menu ul a {
    padding-left: 60px;
  }
}

#shop-navigation .sub-menu-toggle,
#shop-navigation [type="checkbox"]:checked~.sub-menu {
  display: none;
}

#shop-navigation {
  position: relative;
  width: 100%;
  min-height: 1px;
  padding-right: 30px;
  padding-left: 30px;
}

#shop-navigation {
  -webkit-box-flex: 0;
  -webkit-flex: 0 0 100%;
  -ms-flex: 0 0 100%;
  flex: 0 0 100%;
  max-width: 100%;
}

#shop-navigation li {
  display: inline-block;
}

#shop-navigation {
  display: block;
  text-align: center;
  padding-top: 1.5rem;
  z-index: 2020;
}

#shop-navigation .menu {
  margin-bottom: 0.5rem;
}

#shop-navigation li {
  margin: 0 0.5rem 1rem;
}

#shop-navigation a {
  padding: 0;
  margin: 0;
}

#shop-navigation .menu-item-has-children>a:first-child::after {
  content: " \f107";
  color: #4e9197;
}

#shop-navigation .sub-menu .menu-item-has-children>a:first-child::after {
  content: " \f105";
  position: absolute;
  right: 1rem;
  line-height: 1.5;
}

#shop-navigation .sub-menu .sub-menu .menu-item-has-children>a:first-child::after {
  content: "";
}

#shop-navigation .menu-item-has-children:hover>.sub-menu {
  display: block;
  position: absolute;
  z-index: 2030;
}

#shop-navigation .sub-menu {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.15);
  -webkit-background-clip: padding-box;
  background-clip: padding-box;
  -webkit-box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.175);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.175);
  cursor: pointer;
  border-radius: 0.25rem;
}

#shop-navigation .sub-menu .sub-menu {
  left: 100%;
  top: -1px;
  margin: -0.25rem 0 0 -0.25rem;
}

#shop-navigation .sub-menu>li:first-child>.sub-menu {
  margin-top: 0;
}

#shop-navigation .sub-menu li {
  background: #ffffff;
  min-width: 10rem;
  max-width: 200rem;
  margin: 0 0 1px;
  text-align: left;
  display: block;
  border-radius: 0.25rem;
}

#shop-navigation .sub-menu a {
  background: transparent;
  padding: 0.25rem 1rem;
}

#shop-navigation .sub-menu li:first-child>a {
  padding-top: 0.5rem;
}

#shop-navigation .sub-menu li:last-child>a {
  padding-bottom: 0.5rem;
}

#shop-navigation .sub-menu .menu-item-has-children a {
  padding-right: 2.25rem;
  padding-left: 1rem;
  position: relative;
}
<nav id="shop-navigation" class="main-navigation text-nohyphen" role="navigation">
  <ul id="shop-menu" class="menu">
    <li id="menu-item-2131" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-home menu-item-2131 menu-item-home"><a href="#">Home</a></li>
    <li id="menu-item-1051" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-1051 menu-item-depth"><a href="#">Depth</a><input id="expand-1051" class="hidden-xs-up" type="checkbox"><a class="toggle sub-menu-toggle" href="#" data-for="expand-1051" aria-label="Expand sub-menu"><span>+</span></a>
      <ul class="sub-menu">
        <li id="menu-item-1052" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-1052 menu-item-level-01"><a href="#">Level 01</a><input id="expand-1052" class="hidden-xs-up" type="checkbox"><a class="toggle sub-menu-toggle" href="#" data-for="expand-1052" aria-label="Expand sub-menu"><span>+</span></a>
          <ul class="sub-menu">
            <li id="menu-item-1053" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-1053 menu-item-level-02"><a href="#">Level 02</a><input id="expand-1053" class="hidden-xs-up" type="checkbox"><a class="toggle sub-menu-toggle" href="#" data-for="expand-1053" aria-label="Expand sub-menu"><span>+</span></a></li>
          </ul>
        </li>
        <li id="menu-item-1937" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-1937 menu-item-level-01a"><a href="#">Level 01a</a><input id="expand-1937" class="hidden-xs-up" type="checkbox"><a class="toggle sub-menu-toggle" href="#" data-for="expand-1937" aria-label="Expand sub-menu"><span>+</span></a>
          <ul class="sub-menu">
            <li id="menu-item-1938" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-1938 menu-item-level-02"><a href="#">Level 02</a></li>
            <li id="menu-item-1940" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-1940 menu-item-level-02a"><a href="#">Level 02a</a></li>
          </ul>
        </li>
        <li id="menu-item-1939" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-1939 menu-item-level-01b"><a href="#">Level 01b</a></li>
      </ul>
    </li>
    <li id="menu-item-1046" class="menu-item menu-item-type-custom menu-item-object-custom menu-item-has-children menu-item-1046 menu-item-pages"><a href="#">Pages</a><input id="expand-1046" class="hidden-xs-up" type="checkbox"><a class="toggle sub-menu-toggle" href="#" data-for="expand-1046" aria-label="Expand sub-menu"><span>+</span></a>
      <ul class="sub-menu" style="right: auto;">
        <li id="menu-item-1695" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1695 menu-item-page-image-alignment"><a href="#">Page Image Alignment</a></li>
        <li id="menu-item-1693" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1693 menu-item-page-image-alignment"><a href="#">Page Image Alignment</a></li>
        <li id="menu-item-1696" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1696 menu-item-page-markup-and-formatting"><a href="#">Page Markup And Formatting</a></li>
        <li id="menu-item-1694" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-1694 menu-item-page-markup-and-formatting"><a href="#">Page Markup And Formatting</a></li>
      </ul>
    </li>
  </ul>
</nav>

1 个答案:

答案 0 :(得分：1)

您正在将max-width应用于相对定位的元素（li s）。

这些元素存在于绝对定位的容器（ul s）中。

在CSS定位中，容器为已定位的子项设置边界，而不是width，height，max-width或其他内容。定位元素被限制在其父元素的边界。

所以你的max-width: 200rem被容器的宽度覆盖了。

这篇文章提供了更多细节，可能有助于进一步解释这个问题：

如果您只想将li文字换行，请添加white-space: nowrap：

#shop-navigation .sub-menu li {
    background: #ffffff;
    min-width: 10rem;
    max-width: 200rem;
    margin: 0 0 1px;
    text-align: left;
    display: block;
    border-radius: 0.25rem;
    white-space: nowrap; /* NEW */
}
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