Problems with pop-up windows not being centered in weebox-JS Tutorial-php.cn

Problems with pop-up windows not being centered in weebox

亚连

Release： 2018-06-23 18:19:43

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This article mainly introduces in detail the solution to the problem that the weebox pop-up window is not displayed in the center. It has a certain reference value. Interested friends can refer to it.

The weebox pop-up window is not displayed on some pages. It is displayed in the center, some pages are displayed in the center, and the centering algorithm of the pop-up window is also OK. Why is this?

1. Solution

As a responsible attitude towards you, I must first inform you of the decisive solution.

Add the following code to the top of the page:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

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Note that it must be like this

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ include file="/components/common/taglib.jsp"%>
<%@ include file="/components/common/jscsslib.jsp"%>

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but not like this



<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ include file="/components/common/taglib.jsp"%>
<%@ include file="/components/common/jscsslib.jsp"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

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2. Error Analysis

jquery weebox summary The basic usage of weebox is introduced. So for the reason why the weebox pop-up box is not displayed in the center, first we must first see whether its setCenterPosition centering algorithm is reasonable.

this.setCenterPosition = function() {
 var wnd = $(window), doc = $(document),
  pTop = doc.scrollTop(), pLeft = doc.scrollLeft(),
  minTop = pTop; 

 pTop += (wnd.height() - self.dh.height()) / 2;
 pTop = Math.max(pTop, minTop);
 pLeft += (wnd.width() - self.dh.width()) / 2;
 self.dh.css({top: pTop, left: pLeft});

}

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I found that the algorithm is still very ok, but please pay attention to doc = $(document).
I also told you the solution to the problem that the weebox is not displayed in the center, so what is the reason?

The declaration must be the first line of the HTML document, before the tag. The
declaration is not an HTML tag; it is an instruction that instructs the web browser as to which version of HTML the page should be written in.
In HTML 4.01, declarations reference DTDs because HTML 4.01 is based on SGML. A DTD specifies the rules for a markup language so that browsers can render content correctly.

Although this paragraph does not directly indicate the relationship between doctype and window centering, it can be guessed from the solution that if it is not specified, the window will be calculated when the width and height of the document are calculated. It is not a standard pixel value, which indirectly causes the x and y coordinates of the pop-up window to be inaccurately positioned.

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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