Sample Code _ javascript tips-js tutorial

This article describes the sample code used to determine whether the client browser supports cookies. For more information, see.

The Code is as follows:

Function check (){
If (window. navigator. cookieEnabled)
Return true;
Else {
Alert ("browser configuration error, Cookie unavailable! ");
Return false ;}
}

2.

The Code is as follows:

SetCookie ('cookie _ test', '1 ');
Var cookie_test = getCookie ('cookie _ test ');
If ('1 '! = Cookie_test)
{
Alert ('unsupported ');
} Else
{
Alert ('support ');
}

Function SetCookie (name, value) // two parameters: one is the name of the cookie and the other is the value.
{
Var Days = 30; // This cookie will be saved for 30 Days
Var exp = new Date (); // new Date ("December 31,999 8 ");
Exp. setTime (exp. getTime () + Days x 24x60*60*1000 );
Document. cookie = name + "=" + escape (value) + "; expires =" + exp. toGMTString ();
}
Function getCookie (name) // The cookie function.
{
Var arr = document. cookie. match (new RegExp ("(^ |)" + name + "= ([^;] *) (; | $ )"));
If (arr! = Null) return unescape (arr [2]); return null;

}
Function delCookie (name) // delete a cookie
{
Var exp = new Date ();
Exp. setTime (exp. getTime ()-1 );
Var cval = getCookie (name );
If (cval! = Null) document. cookie = name + "=" + cval + "; expires =" + exp. toGMTString ();
}

3.

The Code is as follows:

Var cookieEnabled = (navigator. cookieEnabled )? True: false
// Determine whether the cookie is enabled

// If the browser is not ie4 + or ns6 +
If (typeof navigator. cookieEnabled = "undefined "&&! CookieEnabled ){
Document. cookie = "testcookie"
CookieEnabled = (document. cookie = "testcookie ")? True: false
Document. cookie = "" // erase dummy value
}