JavaScript method to detect whether browser cookies have been enabled_javascript skills

The example in this article describes how JavaScript detects whether browser cookies have been enabled. Share it with everyone for your reference. The specific analysis is as follows:

JavaScript detects whether the browser cookie has been activated. The code is slightly complicated. You can determine whether the cookie has been activated by writing a test cookie

var dt = new Date(); 
dt.setSeconds(dt.getSeconds() + 60); 
document.cookie = "cookietest=1; expires=" + dt.toGMTString(); 
var cookiesEnabled = document.cookie.indexOf("cookietest=") != -1; 
if(!cookiesEnabled) { 
　　alert('没有启用cookie ');
} 

I hope this article will be helpful to everyone’s JavaScript programming design.