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首页Bootstrap前端框架深度探索：SitePoint精选集

Bootstrap前端框架深度探索：SitePoint精选集

Bootstrap

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"Bootstrap: A SitePoint Anthology #1 [2016]" 是一本集合了SitePoint网站上关于Bootstrap框架最实用、最有趣的文章的合集。这本书涵盖了Bootstrap的各种主题，适合从初学者到高级开发者，提供丰富的知识和技巧。 Bootstrap是一个广泛使用的前端框架，由Twitter内部开发并在五年内迅速普及，成为了网络上应用最广泛的UI/前端框架，超过700万个网站在某种程度上使用它。这本书包含的文章涉及Bootstrap的多个方面，如提升Bootstrap的可访问性、利用Sass语义化扩展Bootstrap等。对于初学者，书中提供的知识可以帮助他们快速入门，理解HTML、CSS和JavaScript基础知识与Bootstrap的结合。而对于有经验的开发者，书中的技巧和窍门将使他们的开发工作更加高效。本书的前提是读者已经熟悉HTML、CSS，并具备一定的JavaScript基础。书中所有的信息虽然经过了精心校对，但作者和出版商不对任何因书中信息导致的直接或间接损害负责。商标名称在书中仅以编辑方式使用，不构成商业推广。 Bootstrap 4是Bootstrap框架的一个重要版本，可能在书中有所提及，它带来了许多改进和新特性，例如更现代的CSS框架、新的组件和更简洁的设计。读者可以期待学习到如何在Bootstrap 4中实现响应式设计、自定义主题、创建可访问的Web页面以及优化用户体验等内容。通过阅读这本书，读者不仅可以深入了解Bootstrap的架构和工作原理，还能掌握如何在实际项目中有效地应用这个强大的工具。无论是构建企业级网站、创建动态网页还是优化用户界面，Bootstrap都能提供强大的支持，帮助开发者快速构建美观且功能齐全的网页。

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Graph paper

By Sfoerster (Own work) CC-BY-SA-3.0, via Wikimedia Commons

Well, this is also true for Bootstrap’s Grid System. It allows you to create rows and columns and then

place content in the “intersected” areas.

Now the question is, how many rows and columns you can create using Bootstrap’s Grid System?

Bootstrap allows you to create up to 12 columns and unlimited rows — hence the name 12-Grid

System. So, let’s see how we can utilize this grid system to create various types of layouts.

Getting started with Bootstrap’s Grid System

To get started, naturally, you’ll need to have the necessary assets in your page to get Bootstrap working.

If you’re new to Bootstrap, you can refer to our previous article Getting started with Bootstrap or my

book Jump Start Bootstrap, to dig deeper.

16 - Bootstrap: A SitePoint Anthology

Bootstrap: A SitePoint Anthology - 17

Bootstrap’s Grid System is made up of 3 things:

1. A container

2. Rows

3. Columns

Let’s explore each of the above in detail.

Creating a Container

Bootstrap’s grid system needs a container to hold rows and columns. A container is a simple <div>

element with a class of .container. The container is used to provide a proper width for the layout,

acting as a wrapper for the content. Here is the code for this task:

Some content

</div>

Here the container element wraps the content and sets left and right margins. It also has dierent xed

widths in dierent sized devices. Have a look at the following table:

Device Width Container Width

1200px or higher 1170px

992px to 1199px 970px

768px to 991px 750px

Less than 768px auto

You can choose a uid container if you are not fond of a xed layout. To do this, you use the class

.container-fluid. A uid container has no xed width; its width will always be the width of the

device.

Just note that both xed and uid containers have padding of 15px on the left and right sides.

Creating a Row

A row acts like a wrapper around the columns. The row nullies the padding set by the container

element by using a negative margin value of -15px on both the left and right sides.

A row spans from the left edge to the right edge of the container element. It is created by adding the class

.row to a block level element inside the container.

Have a look at the following CodePen:

Some content

</div>

In this demo, you can see the text touching the left edge of the container element. This is because the

container’s padding has been removed by the row due to the negative margins on the row.

Finally, there’s no limit on the number of rows you can create.

Creating Columns

Bootstrap uses dierent column class prexes for dierent sized devices. These prexes are shown in the

table below:

Class Prex Device Size

.col-xs- < 768px

.col-sm- 768px to 991px

.col-md- 992px to 1199px

.col-lg- ≥ 1200px

So, let’s create our rst Bootstrap column:

Some content

</div>

18 - Bootstrap: A SitePoint Anthology

Bootstrap: A SitePoint Anthology - 19

In the above demo, I used the class .col-xs-12 to create a single column that spans across 12 virtual

Bootstrap columns. Hence, this column’s width will be the width of the row.

In the above demo, you will also see the 15px padding reappear to push the element away from the

container. This is because every column in Bootstrap has a padding of 15px.

You must be wondering why I used the class prex that belonged to extra smaller devices, which is

.col-xs-. In Bootstrap, if a column is dened for a particular type of device then it is guaranteed to

behave similarly in larger devices as well. Therefore, a column dened for extra smaller devices will

work in all types of devices.

Let’s now create a 2-column layout for smaller devices and check out its behaviour in larger devices and

extra-small devices. We will use the class prex .col-sm- here. To create 2 columns of equal widths,

we should assign 6 virtual Bootstrap columns to each one of them. This way, we maintain the limit of 12

virtual Bootstrap columns for a single row.

<h1>Bootstrap Grid Demo</h1>

</div>

<h1>2 Columns</h1>

</div>

Nesting with the Grid System

Nesting is one of the ways to create complex designs using Bootstrap’s grid system. It is also the one

section where many rst-timers have trouble.

We understand that to use Bootstrap’s grid system, we need 3 things: A container, rows, and columns. So

to nest a grid system within a column we will need the same three things. But the only dierence is that

the container is already dened. In this case, the columns will behave as the containers for the nested

grid system.

Here’s the logic: The containers provide 15px of padding, which is nullied by the row. Then we dene

columns that again have 15px of padding on the left and right side. So, to nest a grid system within a

column, we simply need rows and columns. No .container or .container-fluid elements are

necessary for a nested grid system.

Here’s an example of a nested grid system:

 Bootstrap grid demo with nested columns

What About More than 12 Columns?

This is one of the root causes for disordered Bootstrap layouts. A wrong calculation in deciding the

number of virtual Bootstrap columns can lead to an improper layout.

In such a case, a virtual row will be created and untted columns will shift to the next row. For example,

if you have dened 2 columns with the classes .col-md-8 and .col-md-5, the second column will

shift to a new row because it requires 5 virtual Bootstrap columns whereas only 4 are left.

Helper Classes

Bootstrap provides various helper classes that can be useful in certain situations in dealing with grids.

These classes are:

} .clearfix: Normally used to clear oats, adding this class to any column will make it shift to a

new row automatically, to help you correct problems that occur with uneven column heights.

20 - Bootstrap: A SitePoint Anthology

剩余105页未读，继续阅读

room_planner

##软件要求 ###服务器端：####IDE：面向 Web 开发人员的 ... ###客户端：####BootStrap：Bootstrap JS v3.2.0 Bootstrap CSS v3.2.0 ####Angular：AngularJS v1.2.9 Angular Route v1.2.16 查询： Jquery 1.11.1

基于SSM+Bootstrap的护士站管理系统

基于SSM+Bootstrap的护士站管理系统简单说一下自己的思路，护士站管理系统的话，应该说是护士在护士台所使用的系统。用这个系统主要是对病人进行管理，方便护士快速查找和管理病人信息。这大概是我的理解主要...

解决打印问题：let errMsg = []; // 监听字体外链请求 $.ajax({ url: $('#iconfont').attr('href'), type: 'get', success: () => { // console.log('You iconfont CDN is up to date'); errMsg.push('You iconfont CDN is up to date') }, error: (XMLHttpRequest, textStatus, errorThrown) => { // alert(`字体外链失效，需要更新 CDN：${textStatus} - ${errorThrown}`) errMsg.push(`字体外链失效，需要更新 CDN：${textStatus} - ${errorThrown}`) } }) // 监听 bootstrap.min.css CDN 请求 $.ajax({ url: $('#bs-min-css').attr('href'), type: 'get', success: () => { errMsg.push('You bootstrap.min.css CDN loading is complete') }, error: (XMLHttpRequest, textStatus, errorThrown) => { errMsg.push(`bootstrap.min.css CDN error：${textStatus} - ${errorThrown}`) } }) console.log(errMsg);

errMsg.push(`bootstrap.min.css CDN error：${textStatus} - ${errorThrown}`); resolve(); } }); }); // 等待所有异步请求完成后再打印数组 Promise.all([fontRequest, cssRequest]).then(() => { console....

rm(list=ls()) k <- 1000 n <- 200 alp <- 2 lamb <- 1 set.seed(123) library(bootstrap) for(i in 1:k){ x <- rgamma(n,alp,lamb) } #####bootstrap##### B <- 2000 boot <-matrix(0,nrow=n,ncol=2) for (b in 1:B) { id <- sample(1:n, size = n, replace = TRUE) boot[b,] <- c(x[alp[id]], x[lamb[id]]) }报错

#####bootstrap##### B boot (0,nrow=n,ncol=2) for (b in 1:B) { id (1:n, size = n, replace = TRUE) boot[b,] (x[alp[id]], x[lamb[id]]) } ``` 注意，这只是解决了代码中的错误，但是无法确定这段代码的...

php将{"Bootstrap":{"aname":"Bootstrap","aclick":11},"Bootstrap2":{"aname":"Bootstrap2","aclick":12}}转换为{"Bootstrap":11,"Bootstrap2":12}

在你的情况下，你需要将`{"Bootstrap":{"aname":"Bootstrap","aclick":11},"Bootstrap2":{"aname":"Bootstrap2","aclick":12}}`转换为`{"Bootstrap":11,"Bootstrap2":12}`。下面是一个使用PHP实现这个转换的示例...

../configure: line 3: /export/home/anliying/bin/cmake-3.26.4/bootstrap: Permission denied ../configure: line 3: exec: /export/home/anliying/bin/cmake-3.26.4/bootstrap: cannot execute: Permission denied

这个错误提示表明你在运行一个名为“configure”的脚本时，该脚本无法执行位于“/export/home/anliying/bin/cmake-3.26.4/bootstrap”路径下的CMake文件，因为你没有执行该文件的权限。解决方法是，你需要给“/...

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Bootstrap前端框架深度探索：SitePoint精选集

room_planner

基于SSM+Bootstrap的护士站管理系统

org.ros.rosjava_bootstrap:gradle_plugins

依据该例子，分别给生产者消费者写yml版的配置文件

datatable修改表格边框颜色和bootstrap panel颜色一致

rm(list=ls()) k <- 1000 n <- 200 alp <- 2 lamb <- 1 set.seed(123) library(bootstrap) for(i in 1:k){ x <- rgamma(n,alp,lamb) } #####bootstrap##### B <- 2000 boot <-matrix(0,nrow=n,ncol=2) for (b in 1:B) { id <- sample(1:n, size = n, replace = TRUE) boot[b,] <- c(x[alp[id]], x[lamb[id]]) }报错

php将{"Bootstrap":{"aname":"Bootstrap","aclick":11},"Bootstrap2":{"aname":"Bootstrap2","aclick":12}}转换为{"Bootstrap":11,"Bootstrap2":12}

bootstrap.yml文件如何加载nacos中指定的文件，例如redisson.yml文件，该如何编写这个bootstrap.yml详细编写和解释

elasticsearch配置文件

bootstrap:887 Error: Cannot find module './hijt/wxoperator/index'

bootstrap-table回显选中行

../configure: line 3: /export/home/anliying/bin/cmake-3.26.4/bootstrap: Permission denied ../configure: line 3: exec: /export/home/anliying/bin/cmake-3.26.4/bootstrap: cannot execute: Permission denied

bootstrap行偏移

bootstrap：（粘贴代码）

bootstrap:Failed to load resource: the server responded with a status of 404 ()

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linux源码安装Bootstrap

bootstrap.yml文件如何加载nacos中指定的文件，例如redisson.yml和redisson2.yml文件，该如何编写这个bootstrap.yml详细编写和解释

sudo: ./bootstrap: command not found

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