Bootstrap forms that you must learn every day_javascript skills

This article mainly explains the form. This is actually not unfamiliar to people who have done websites, and it can be said to be the most commonly used Form form for submitting data. This article mainly explains the content:

1. Basic case
2. Inline form
3. Horizontally arranged forms
4.Supported controls
5. Static controls
6.Control status
7. Control size
8. Help text

Basic case
Individual form controls will be automatically assigned some global styles. All , and <select> elements that have .form-control set will be set to width: 100%; by default. Wrapping the label and the previously mentioned controls in a .form-group can provide the best arrangement. <br> </select>

<form role="form">
 <div class="form-group">
 <label for="exampleInputEmail1">Email address</label>
 <input type="email" class="form-control" id="exampleInputEmail1" placeholder="Enter email">
 </div>
 <div class="form-group">
 <label for="exampleInputPassword1">Password</label>
 <input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">
 </div>
 <div class="form-group">
 <label for="exampleInputFile">File input</label>
 <input type="file" id="exampleInputFile">
 <p class="help-block">Example block-level help text here.</p>
 </div>
 <div class="checkbox">
 <label>
 <input type="checkbox"> Check me out
 </label>
 </div>
 <button type="submit" class="btn btn-default">Submit</button>
</form>

The width of both text boxes is indeed 100%. And there are three form-groups.
Inline form
Set .form-inline for left-aligned and inline-block level controls to arrange them more compactly.
Need to set the width: In Bootstrap, input, select and textarea are set to 100% width by default. In order to use inline forms, you need to set the width specifically for the form control you are using.

Be sure to set a label: If you do not set a label for each input control, screen readers will not be able to read it correctly. For these inline forms, you can hide them by setting .sr-only for the label.

<form class="form-inline" role="form">
 <div class="form-group">
 <label class="sr-only" for="exampleInputEmail2">Email address</label>
 <input type="email" class="form-control" id="exampleInputEmail2" placeholder="Enter email">
 </div>
 <div class="form-group">
 <label class="sr-only" for="exampleInputPassword2">Password</label>
 <input type="password" class="form-control" id="exampleInputPassword2" placeholder="Password">
 </div>
 <div class="checkbox">
 <label>
 <input type="checkbox"> Remember me
 </label>
 </div>
 <button type="submit" class="btn btn-default">Sign in</button>
</form>

Horizontally arranged form
By adding .form-horizontal to the form and using Bootstrap's preset grid class, labels and control groups can be laid out horizontally side by side. Doing so will change the behavior of .form-group so that it behaves like rows in a grid system, so there is no need to use .row anymore.

<form class="form-horizontal" role="form">
 <div class="form-group">
 <label for="inputEmail3" class="col-sm-2 control-label">Email</label>
 <div class="col-sm-10">
 <input type="email" class="form-control" id="inputEmail3" placeholder="Email">
 </div>
 </div>
 <div class="form-group">
 <label for="inputPassword3" class="col-sm-2 control-label">Password</label>
 <div class="col-sm-10">
 <input type="password" class="form-control" id="inputPassword3" placeholder="Password">
 </div>
 </div>
 <div class="form-group">
 <div class="col-sm-offset-2 col-sm-10">
 <div class="checkbox">
 <label>
 <input type="checkbox"> Remember me
 </label>
 </div>
 </div>
 </div>
 <div class="form-group">
 <div class="col-sm-offset-2 col-sm-10">
 <button type="submit" class="btn btn-default">Sign in</button>
 </div>
 </div>
</form>

Supported controls
The standard form controls supported are shown in the form layout case.
Input
Most form controls and text input field controls. Includes all types supported by HTML5: text, password, datetime, datetime-local, date, month, time, week, number, email, url, search, tel and color.
Note: Only input controls with correctly set type can be given the correct style.
Text box example

Copy code The code is as follows:

Textarea
Form controls that support multi-line text. The rows attribute can be changed as needed.

<h1 id="textarea">textarea</h1>
 <textarea class="form-control" rows="3"></textarea>

Checkbox and radio
Checkbox is used to select one or more options in a list, while radio is used to select only one option from multiple options.
Default appearance (stacked together)

<div class="checkbox">
 <label>
 <input type="checkbox" value="">
 Option one is this and that&mdash;be sure to include why it's great
 </label>
</div>

<div class="radio">
 <label>
 <input type="radio" name="optionsRadios" id="optionsRadios1" value="option1" checked>
 Option one is this and that&mdash;be sure to include why it's great
 </label>
</div>
<div class="radio">
 <label>
 <input type="radio" name="optionsRadios" id="optionsRadios2" value="option2">
 Option two can be something else and selecting it will deselect option one
 </label>
</div>

Inline checkboxes

By applying .checkbox-inline or .radio-inline to a series of checkbox or radio controls, you can arrange these controls in a row.

<label class="checkbox-inline">
 <input type="checkbox" id="inlineCheckbox1" value="option1"> 1
</label>
<label class="checkbox-inline">
 <input type="checkbox" id="inlineCheckbox2" value="option2"> 2
</label>
<label class="checkbox-inline">
 <input type="checkbox" id="inlineCheckbox3" value="option3"> 3
</label>

 

 同理Radio是一样的，只需要添加一下样式即可。
Select

<select class="form-control">
 <option>1</option>
 <option>2</option>
 <option>3</option>
 <option>4</option>
 <option>5</option>
</select>

<select multiple class="form-control">
 <option>1</option>
 <option>2</option>
 <option>3</option>
 <option>4</option>
 <option>5</option>
</select>

 

静态控件
 在水平布局的表单中，如果需要将一行纯文本放置于label的同一行，为

元素添加.form-control-static即可。

<form class="form-horizontal" role="form">
 <div class="form-group">
 <label class="col-sm-2 control-label">Email</label>
 <div class="col-sm-10">
 <p class="form-control-static">email@example.com</p>
 </div>
 </div>
 <div class="form-group">
 <label for="inputPassword" class="col-sm-2 control-label">Password</label>
 <div class="col-sm-10">
 <input type="password" class="form-control" id="inputPassword" placeholder="Password">
 </div>
 </div>
</form>

控件状态
　　通过为控件和label设置一些基本状态，可以为用户提供回馈。
　　输入焦点
　　我们移除了某些表单控件的默认outline样式，并对其:focus状态赋予了box-shadow样式。

复制代码 代码如下:

　　被禁用的输入框
 　　为输入框设置disabled属性可以防止用户输入，并能改变一点外观，使其更直观。

复制代码 代码如下:

　　被禁用的fieldset
　　为

设置disabled属性可以禁用

中包含的所有控件。
标签的链接功能不受影响

这个class只改变按钮的外观，并不能禁用其功能。建议自己通过JavaScript代码禁用链接功能。

跨浏览器兼容性

虽然Bootstrap会将这些样式应用到所有浏览器上，Internet Explorer 9及以下浏览器中的

并不支持disabled属性。因此建议在这些浏览器上通过JavaScript代码来禁用fieldset

<form role="form">
 <fieldset disabled>
 <div class="form-group">
 <label for="disabledTextInput">Disabled input</label>
 <input type="text" id="disabledTextInput" class="form-control" placeholder="Disabled input">
 </div>
 <div class="form-group">
 <label for="disabledSelect">Disabled select menu</label>
 <select id="disabledSelect" class="form-control">
 <option>Disabled select</option>
 </select>
 </div>
 <div class="checkbox">
 <label>
 <input type="checkbox"> Can't check this
 </label>
 </div>
 <button type="submit" class="btn btn-primary">Submit</button>
 </fieldset>
</form>

　　可将鼠标移到各个控件上进行查看效果。
校验状态
Bootstrap对表单控件的校验状态，如error、warning和success状态，都定义了样式。使用时，添加.has-warning、.has-error或.has-success到这些控件的父元素即可。任何包含在此元素之内的.control-label、.form-control和.help-block都将接受这些校验状态的样式。

<div class="form-group has-success">
 <label class="control-label" for="inputSuccess">Input with success</label>
 <input type="text" class="form-control" id="inputSuccess">
</div>
<div class="form-group has-warning">
 <label class="control-label" for="inputWarning">Input with warning</label>
 <input type="text" class="form-control" id="inputWarning">
</div>
<div class="form-group has-error">
 <label class="control-label" for="inputError">Input with error</label>
 <input type="text" class="form-control" id="inputError">
</div>

控件尺寸
通过.input-lg之类的class可以为控件设置高度，通过.col-lg-*之类的class可以为控件设置宽度。
高度尺寸
创建大一些或小一些的表单控件以匹配按钮尺寸。

 <input class="form-control input-lg" type="text" placeholder=".input-lg">
 <input class="form-control" type="text" placeholder="Default input">
 <input class="form-control input-sm" type="text" placeholder=".input-sm">
 
 <select class="form-control input-lg">...</select>
 <select class="form-control">...</select>
 <select class="form-control input-sm">...</select>

 

调整列尺寸
用栅格系统中的列包裹input或其任何父元素，都可很容易的为其设置宽度。

<div class="row">
 <div class="col-xs-2">
 <input type="text" class="form-control" placeholder=".col-xs-2">
 </div>
 <div class="col-xs-3">
 <input type="text" class="form-control" placeholder=".col-xs-3">
 </div>
 <div class="col-xs-4">
 <input type="text" class="form-control" placeholder=".col-xs-4">
 </div>
</div>

Help text
Block-level help text for form controls.

Copy code The code is as follows:

Exclusively own one or more lines block-level help text.

This article mainly explains the style control of various controls in the form, including the simple style use of buttons. The next article will focus on explaining the style of buttons.

For details, please refer to:

Comprehensive analysis of how to use Bootstrap forms (form styles)

Comprehensive analysis of how to use Bootstrap forms (form controls)

Comprehensive analysis of how to use Bootstrap forms (form control status)

Comprehensive analysis of how to use Bootstrap forms (form buttons)