Article Content Source: Bootstrap section 57 JavaWeb dark horse in
HTML: Hyper Text Markup Language
HTML:
Hypertext: Hypertext is hyperlinked to the method, a variety of text at different spatial information organization mesh with the text .
Markup languages: not a programming language (as long as you write will be executed).
extension html documents: .html, or .xml.
Constituted by the label language.
Containment tags:
Tags can not you have me I have you.
And as MySQL are case insensitive, but the official suggested lowercase.
File tags: html root tag / head plus head tag attributes / title heading tags / body body label
text label:
HTML syntax is not strict.
More tags category.
CSS: Cascading Style Sheets
JavaScript
a scripting language, can achieve some dynamic effects, and better user interaction.
JavaScript is actually a loosely typed language. var type variable value of any type may be defined.
A typeof () operator
attention, there is a characteristic JS:
± No. latter value can be automatically converted into number
because the value JS different types may be compared so that there is a special JS comparison operators: congruent (if different type directly return false).
! 0 and non-NaN is true, the other false; the remaining empty string is false is true.
Statement ends with a semicolon, but there is a line break line can be.
var global variable is not
a local variable is the
parameter type may be omitted when the method definition, i.e. without var
same JS method overrides without error.
JS objects in:
Function
Array is a special place various types of numbers.
Regular Expressions:
DOM: control the content of the document
</head>
<body>
<img id="light" src="img/off.gif">
<script>
/*
分析：
1.获取图片对象
2.绑定单击事件
3.每次点击切换图片
* 规则：
* 如果灯是开的 on,切换图片为 off
* 如果灯是关的 off,切换图片为 on
* 使用标记flag来完成
*/
//1.获取图片对象
var light = document.getElementById("light");
var flag = false;//代表灯是灭的。 off图片
//2.绑定单击事件
light.onclick = function(){
if(flag){//判断如果灯是开的，则灭掉
light.src = "img/off.gif";
flag = false;
}else{
//如果灯是灭的，则打开
light.src = "img/on.gif";
flag = true;
}
}
</script>
</body>
</html>
Window: window object
alert () displays a warning message box with a period and a confirmation button.
confirm () displays a dialog box with a message and the confirmation period and a cancel button buttons.
* If the user clicks the OK button, the method returns to true
* If the user clicks the Cancel button, the method returns false
prompt () display can prompt the user to enter the dialog box.
* Return value: Gets the value entered by the user
Bowser object model
JUDGMENT:
-
W3C DOM standard is divided into three distinct parts:
-
Core DOM - standard model for any structured document
-
XML DOM - standard model for XML documents
-
HTML DOM - standard model for HTML documents
-
Core DOM model:
-
Element: element object
1. Get / create: to capture and create through the Document
2. Method:
1. removeAttribute (): Delete Attribute
2. setAttribute (): set the properties -
Node: node object, the other five of the parent
* Features: All dom object can be thought of as a node
* Methods:
* CRUD dom tree:
* appendChild (): Adds a new child node to the end node of the list of child nodes .
* RemoveChild (): Delete (and return to) the specified child node of the current node.
* ReplaceChild (): Replace with a child node of the new node.
* Attributes:
* Returns the parent node of parentNode.
Event:
Focus
mouse
keyboard
submission form
Bootstrap: a front-end development framework, is a semi-finished software.
benefit:
- It defines a number of styles.
- Responsive layout. The same set of pages can be compatible with different resolution devices.
Bootstrap：
1. 概念： 一个前端开发的框架，Bootstrap，来自 Twitter，是目前很受欢迎的前端框架。Bootstrap 是基于 HTML、CSS、JavaScript 的，它简洁灵活，使得 Web 开发更加快捷。
* 框架:一个半成品软件，开发人员可以在框架基础上，在进行开发，简化编码。
* 好处：
1. 定义了很多的css样式和js插件。我们开发人员直接可以使用这些样式和插件得到丰富的页面效果。
2. 响应式布局。
* 同一套页面可以兼容不同分辨率的设备。
2. 快速入门
1. 下载Bootstrap
2. 在项目中将这三个文件夹复制
3. 创建html页面，引入必要的资源文件
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
<title>Bootstrap HelloWorld</title>
<!-- Bootstrap -->
<link href="css/bootstrap.min.css" rel="stylesheet">
Hello world!
</body>
</html>
Responsive layout
* 同一套页面可以兼容不同分辨率的设备。
* 实现：依赖于栅格系统：将一行平均分成12个格子，可以指定元素占几个格子
* 步骤：
1. 定义容器。相当于之前的table、
* 容器分类：
1. container：两边留白
2. container-fluid：每一种设备都是100%宽度
2. 定义行。相当于之前的tr 样式：row
3. 定义元素。指定该元素在不同的设备上，所占的格子数目。样式：col-设备代号-格子数目
* 设备代号：
1. xs：超小屏幕 手机 (<768px)：col-xs-12
2. sm：小屏幕 平板 (≥768px)
3. md：中等屏幕 桌面显示器 (≥992px)
4. lg：大屏幕 大桌面显示器 (≥1200px)
* 注意：
1. 一行中如果格子数目超过12，则超出部分自动换行。
2. 栅格类属性可以向上兼容。栅格类适用于与屏幕宽度大于或等于分界点大小的设备。
3. 如果真实设备宽度小于了设置栅格类属性的设备代码的最小值，会一个元素沾满一整行。
CSS style and JS plugins
1. 全局CSS样式：
* 按钮：class="btn btn-default"
* 图片：
* class="img-responsive"：图片在任意尺寸都占100%
* 图片形状
* <img src="..." alt="..." class="img-rounded">：方形
* <img src="..." alt="..." class="img-circle"> ： 圆形
* <img src="..." alt="..." class="img-thumbnail"> ：相框
* 表格
* table
* table-bordered
* table-hover
* 表单
* 给表单项添加：class="form-control"
2. 组件：
* 导航条
* 分页条
3. 插件：
* 轮播图
