Detailed explanation of bootstrap making a login registration page

This article brings you a detailed explanation of bootstrap to create a login registration page. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

The content of this chapter is to use bootstrap to create a login registration page, and use jquery-validate for form verification.
Technology: bootstrap, font-awesome, jquery-validate;
Features: Responsive layout, form validation, background image adaptive screen Size;
Purpose: Learn knowledge from actual combat.

Rendering:

##html code :

The import of third-party resources is done using cdn; of course, you can also download it yourself and import it locally.

nbsp;html>  
  
      
        <meta>  
        <title>bootstrap案例</title>  
        <!--用百度的静态资源库的cdn安装bootstrap环境-->  
        <!-- Bootstrap 核心 CSS 文件 -->  
        <link>  
        <!--font-awesome 核心我CSS 文件-->  
        <link>  
        <!-- 在bootstrap.min.js 之前引入 -->  
        <script></script>  
        <!-- Bootstrap 核心 JavaScript 文件 -->  
        <script></script>  
        <!--jquery.validate-->  
        <script></script>  
        <script></script>  
        <style>  
            body{background: url(img/4.jpg) no-repeat;background-size:cover;font-size: 16px;}  
            .form{background: rgba(255,255,255,0.2);width:400px;margin:100px auto;}  
            #login_form{display: block;}  
            #register_form{display: none;}  
            .fa{display: inline-block;top: 27px;left: 6px;position: relative;color: #ccc;}  
            input[type="text"],input[type="password"]{padding-left:26px;}  
            .checkbox{padding-left:21px;}  
        </style>  
      
      
        <!--  
            基础知识：  
            网格系统:通过行和列布局  
            行必须放在container内  
            手机用col-xs-*  
            平板用col-sm-*  
            笔记本或普通台式电脑用col-md-*  
            大型设备台式电脑用col-lg-*  
            为了兼容多个设备，可以用多个col-*-*来控制；  
        -->  
    <div>  
        <div>  
            <form>  
                <h3>Login to your account</h3>  
                <div>  
                    <div>  
                        <i></i>  
                        <input>  
                    </div>  
                    <div>  
                            <i></i>  
                            <input>  
                    </div>  
                    <div>  
                        <label>  
                            <input> Remember me  
                        </label>  
                        <hr>  
                        <a>Create an account</a>  
                    </div>  
                    <div>  
                        <input>     
                    </div>  
                </div>  
            </form>  
        </div>  
  
        <div>  
            <form>  
                <h3>Login to your account</h3>  
                <div>  
                    <div>  
                        <i></i>  
                        <input>  
                    </div>  
                    <div>  
                            <i></i>  
                            <input>  
                    </div>  
                    <div>  
                            <i></i>  
                            <input>  
                    </div>  
                    <div>  
                            <i></i>  
                            <input>  
                    </div>  
                    <div>  
                        <input>  
                        <input>  
                    </div>  
                </div>  
            </form>  
        </div>  
        </div>  
    <script></script>  
      

js code:

$().ready(function() {  
    $("#login_form").validate({  
        rules: {  
            username: "required",  
            password: {  
                required: true,  
                minlength: 5  
            },  
        },  
        messages: {  
            username: "请输入姓名",  
            password: {  
                required: "请输入密码",  
                minlength: jQuery.format("密码不能小于{0}个字 符")  
            },  
        }  
    });  
    $("#register_form").validate({  
        rules: {  
            username: "required",  
            password: {  
                required: true,  
                minlength: 5  
            },  
            rpassword: {  
                equalTo: "#register_password"  
            },  
            email: {  
                required: true,  
                email: true  
            }  
        },  
        messages: {  
            username: "请输入姓名",  
            password: {  
                required: "请输入密码",  
                minlength: jQuery.format("密码不能小于{0}个字 符")  
            },  
            rpassword: {  
                equalTo: "两次密码不一样"  
            },  
            email: {  
                required: "请输入邮箱",  
                email: "请输入有效邮箱"  
            }  
        }  
    });  
});  
$(function() {  
    $("#register_btn").click(function() {  
        $("#register_form").css("display", "block");  
        $("#login_form").css("display", "none");  
    });  
    $("#back_btn").click(function() {  
        $("#register_form").css("display", "none");  
        $("#login_form").css("display", "block");  
    });  
});

Now let’s talk about the knowledge points used:

①bootstrap layout:
bootstrap uses grid layout, using col-x-x
Conditions of use: It can be used under .container and .row. The structure is as follows:

<div>  
   <div>  
      <div></div>  
      <div></div>        
   </div>  
   <div>...</div>  
</div>

Reference value:

col-xs-*: less than 768px, mobile phone
col-sm- *: Greater than 768px, tablet
col-md-*: Greater than 998px, ordinary computer, notebook, etc.
col-lg-*: Greater than 1200px, generally large desktop computer
can be used simultaneously to achieve cross- Multiple device effects
Offset: col-
-offset-

②Form:

The form here is not much different from the ordinary form, so I won’t say more .

③Usage of font-awesome:

The 4.3.0 version is used, and the usage method is

<i></i>

fa-lg represents a large image

More icon reference: http:// fontawesome.dashgame.com/

④jquery-validate form verification:

This is the key point I want to talk about,
The first step: First import jquery-validate third-party resources,
Step 2: Create the form form and initialize validate

$("#login_form").validate({  
        rules: {  
            username: "required",  
            password: {  
                required: true,  
                minlength: 5  
            },  
        },  
        messages: {  
            username: "请输入姓名",  
            password: {  
                required: "请输入密码",  
                minlength: jQuery.format("密码不能小于{0}个字 符")  
            },  
        }  
    });

Note that the login_form here must be the selector on the form form. Because the author set it on p, the console shows an error that settings are not defined. The username and password here are both name values ​​in the form; rules are rules, and message is the prompted information

required: true means that the field is required,
minlength: means that the length is at least 5, maxlength is html5 Supported, so there is no need to set it here
equalTo: means the same as XX, followed by the first value, "#id" or ".class"
message: The corresponding content is followed by Prompt text information.

⑤Background adaptive screen size:

I was looking for documentation everywhere before I knew it, but after knowing it I found it is so simple, that is background-size:cover; This way, the background image can be the same size as the browser . It's very simple!

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