Day24-sticky Nav

This article originates from: Chun elder brother personal blog: http://www.liyuechun.org
Author: © Li Yue Chun-the person chasing time
Synopsis: JavaScript30 is a 30 day challenge from Wes Bos. The project offers 30 video tutorials, 30 challenge starter documents, and 30 Challenge solution source code free of charge. The goal is to help people write with pure JavaScript, without using frames and libraries, and without compilers and references. Now you see the 24th article in this series of guides. Complete Chinese version of the Guide and video tutorials on the entire stack from zero to one tribe. Effect Chart

The 24th day of training is to do a slide down to the navigation bar to make it a fixed style. This style in daily life is a very common effect, in order to users in the content of the decline can be faster to jump to their own needs of other content, the site will generally add this effect, user-friendly user for faster page navigation. HTML Source

<! DOCTYPE html>  
 CSS Source code   
HTML {box-sizing:border-box;
  Background: #eeeeee;
  font-family: ' Helvetica Neue ';
  font-size:20px;
font-weight:200;

} body {margin:0;}

*, *:before, *:after {box-sizing:inherit;}
  . site-wrap {max-width:700px;
  margin:70px Auto;
  Background:white;
  padding:40px;
  text-align:justify;
  box-shadow:0 0 10px 5px rgba (0, 0, 0, 0.05);
  Transform:scale (0.98);
Transition:transform 0.5s;

}. Fixed-nav. site-wrap {Transform:scale (1);}
  header {Text-align:center;
  HEIGHT:50VH;
  Background:url (http://wes.io/iEgP/wow-so-deep.jpg) bottom center no-repeat;
  Background-size:cover;
  Display:flex;
  Align-items:center;
Justify-content:center;
  } h1 {Color:white;
  FONT-SIZE:7VW;
  text-shadow:3px 4px 0 rgba (0, 0, 0, 0.2)} nav {background:black;
  top:0;
  width:100%;
  Transition:all 0.5s;
  position:relative;
Z-index:1;
  }. Fixed-nav nav {position:fixed;
box-shadow:0 10px 10px rgba (0, 0, 0, 0.2); } Nav ul {margin: 0;
  padding:0;
  List-style:none;
Display:flex;
  } nav li {flex:1;
  Text-align:center;
  Display:flex;
  Justify-content:center;
Align-items:center;
  } li.logo {max-width:0;
  Overflow:hidden;
  Background:white;
  Transition:all 5s;
  font-weight:600;
font-size:30px;

}. Fixed-nav Li.logo {max-width:500px;}

Li.logo a {color:black;} Nav