a-drop-down menu
时间: 2023-10-23 16:09:10 浏览: 54
A drop-down menu is a UI element that displays a list of options when clicked or hovered over. The options are usually displayed in a vertical list that "drops down" from the menu bar or button. Drop-down menus are commonly used in web design and application interfaces to provide users with a selection of choices without taking up too much screen space. They can be simple text options, or they can include images, icons, or sub-menus for more complex navigation.
相关问题
写出如下要求的详细代码,1.有三个按钮,类名是nav-list,点击其中一个,出现下拉菜单,每个下拉菜单中都有四个用a标签写的按钮,2.点击其中一个按钮之后,下拉菜单就会隐藏,3.再次点击其中任何一个按钮,都可以出现下拉菜单
很抱歉,我可以回答您的问题。以下是您所需的代码:
HTML代码:
```
<div class="nav-list">
<button class="btn-1">按钮1</button>
<button class="btn-2">按钮2</button>
<button class="btn-3">按钮3</button>
<div class="drop-down-menu-1">
<a href="#">菜单1</a>
<a href="#">菜单2</a>
<a href="#">菜单3</a>
<a href="#">菜单4</a>
</div>
<div class="drop-down-menu-2">
<a href="#">菜单1</a>
<a href="#">菜单2</a>
<a href="#">菜单3</a>
<a href="#">菜单4</a>
</div>
<div class="drop-down-menu-3">
<a href="#">菜单1</a>
<a href="#">菜单2</a>
<a href="#">菜单3</a>
<a href="#">菜单4</a>
</div>
</div>
```
CSS代码:
```
.nav-list {
display: flex;
justify-content: space-between;
}
.drop-down-menu-1,
.drop-down-menu-2,
.drop-down-menu-3 {
display: none;
position: absolute;
width: 200px;
background-color: #fff;
border: 1px solid #ccc;
z-index: 1;
}
.drop-down-menu-1 a,
.drop-down-menu-2 a,
.drop-down-menu-3 a {
display: block;
padding: 10px 15px;
color: #333;
text-decoration: none;
}
.btn-1:focus ~ .drop-down-menu-1,
.btn-2:focus ~ .drop-down-menu-2,
.btn-3:focus ~ .drop-down-menu-3 {
display: block;
}
```
JavaScript代码:
```
const buttons = document.querySelectorAll('.nav-list button');
buttons.forEach((button) => {
button.addEventListener('click', () => {
button.blur();
});
});
```
希望可以帮到您!
spss中 Welch的F检验或Brown-Forsythe的F检验怎么操作
Welch's F-test and Brown-Forsythe's F-test can be conducted in SPSS using the general linear model (GLM) procedure. First, click on "Analyze" in the menu bar and select "General Linear Model" from the drop-down menu. Then, select "Univariate" to specify a single dependent variable. Next, enter the dependent variable into the "Dependent Variable" box and the independent variable(s) into the "Fixed Factor(s)" box. After that, click on the "Options" button and select "F-Tests" from the drop-down menu. Finally, select either "Welch" or "Brown-Forsythe" as the method for unequal variances under the "Equal Variances Not Assumed" option. Click "OK" to run the analysis.
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