Several methods of javascript progress bar
Let’s take a look at the final effect first:
The first step is to basically build the basic code and see the effect demonstration:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>制作进度条的两种方法</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>
*{
margin:0;<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>制作进度条的两种方法</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>
*{
margin:0;The third step, the second way to make a progress bar---directly use pictures + background pictures
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>
*{
margin:0;Of course, this method has some requirements for pictures. If you look carefully, you will find that the width is 2 times that of img.
In addition, the picture must be transparent gif, which means hollow. hehe. No progress bar is visible. In the example, background-position is the px value. In fact, you can use % to control it more accurately, such as: background-position:80% 50%; etc.
In general, this should be considered a skill and can be used in actual projects.
Step 4, Application
Finally we look at a simple application:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style>
*{Of course you can also use the first method. What needs to be changed in the first method is the width attribute of the progress bar.
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