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Js click to close the layer outside the pop-up layer

Source: Internet
Author: User
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For today's work, we need to create a pop-up layer. Then, we can not only click the close button to close the layer, but also click anywhere outside the pop-up layer to close the pop-up layer.

We often encounter this effect during web Front-end development, that is, we click an element to make the layer appear, and click a local layer outside the layer to hide it, in the ordinary development process, Xiao Bian also encountered such a problem and obtained a better method through his own practice. I will tell you today, in order to make everyone clear, I will directly describe the instance.

1. knowledge to be used

1. Event bubbling

2.event object (e.tar get and e. srcElement)

Ii. Instance

Html code:

The Code is as follows: Copy code

<Div id = "div1"> </div>
<Input type = "button" value = "click" id = "btn"/>

Js Code:

The Code is as follows: Copy code
Window. onload = function ()
{
Var oDiv = document. getElementById ("div1 ″);
Var oBtn = document. getElementById ("btn ");
Document. onclick = function (ev)
{
Var e = ev | event;
Var targetcmde.tar get | e. srcElement;
If(e.tar get. id! = 'Did1') // event object
{
ODiv. style. display = "none ";
}
}
OBtn. onclick = function (ev)
{
Var e = ev | event;
ODiv. style. display = "block ";
If (e & e. stopPropagation) {// prevents bubbling
E. stopPropagation ();
} Else {
Window. event. cancelBubble = true;
}
}
}

Example 2

The Code is as follows: Copy code

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = http://www.bKjia. c0m>
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = UTF-8"/>
<Title> click the text pop-up layer </title>
<Style type = "text/css">
<! --
* {Font-size: 12px; font-family: Verdana, Geneva, sans-serif; line-height: 14px}
A {color: #039}
A: hover {color: # f60}
. Pop {position: absolute; left: 40%; top: 40%; width: 300px; height: 100px; background: # eee; border: 1px solid # ccc}
. Pop_head {position: relative; height: 20px; background: # ccc}
. Pop_head a {position: absolute; right: 8px; line-height: 20px; color: #000; text-decoration: none}
. Pop_head a: hover {color: # f60; text-decoration: none}
. Pop_body {padding: 8px}
-->
</Style>
</Head>
<Body>
<! -- First set a layer: -->
<Div id = "pop" class = "pop" style = "display: none">
<Div class = "pop_head"> <a href = "javascript: void (0);" onclick = "hide ()"> close </a> </div>
<Div class = "pop_body"> thank you for choosing ...... </Div>
</Div>
<! -- The button for the pop-up layer: -->
<A href = "javascript: void (0);" onclick = "show ();"> pop-up button </a>
<Script type = "text/javascript">
Var EX = {
AddEvent: function (k, v ){
Var me = this;
If (me. addEventListener)
Me. addEventListener (k, v, false );
Else if (me. attachEvent)
Me. attachEvent ("on" + k, v );
Else
Me ["on" + k] = v;
},
RemoveEvent: function (k, v ){
Var me = this;
If (me. removeEventListener)
Me. removeEventListener (k, v, false );
Else if (me. detachEvent)
Me. detachEvent ("on" + k, v );
Else
Me ["on" + k] = null;
},
Stop: function (evt ){
Evt = evt | window. event;
Evt. stopPropagation? Evt. stopPropagation (): evt. cancelBubble = true;
}
};
Document. getElementById ('pop'). onclick = EX. stop;
Var url = '#';
Function show (){
Var o = document. getElementById ('pop ');
O. style. display = "";
SetTimeout (function () {EX. addEvent. call (document, 'click', hide );});
}
Function hide (){
Var o = document. getElementById ('pop ');
O. style. display = "none ";
EX. removeEvent. call (document, 'click', hide );
}
</Script>
</Body>
</Html>

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