javascript - How to close browser tab -


i not able close current browser tab using javascript.

i tried- 

    window.close(); //1      window.open("", '_self');//2     settimeout(function(){         window.close();     },100);      window.open('','_parent',''); //3     window.close();      window.top.opener=null; //4     window.close();

nothing working me in chrome

window.close method allowed called windows opened script using window.open method.


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