[JS]-the world's shortest ie judgment

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In the past, the shortest ie determination was developed by virtue of the feature that IE does not support vertical tabs.

VaR IE = ! + " \ V1 " ;

 

Only 7 bytes! See this articleArticle, 32 bytes, ehr... 9, ehr... 7 !!! To know if your browser is IE, describes how foreigners reduce IE's judgment from 32 bytes to 7 bytes step by step! Story

But this record was broken by a Russian in January 8 this year, and now it only takes 6 bytes! It makes use of the difference between IE and the standard browser in handling the tostring method of arrays. For the standard browser, if the last character in the array is a comma, The JS engine will automatically remove it.

VaR IE = ! - [ 1 ,];

 

Instance:

<SCRIPT>
VaR IE = ! - [ 1 ,];
Alert (IE );
</SCRIPT>

If we judge from the Perspective of Non-ie, we can save a bit, because when we are compatible, most of the cases are IE and non-ie.

VaR Notie = - [ 1 ,];

Instance:

<SCRIPT>
If ( - [ 1 ,]) {
Alert ( " This is not Internet Explorer! " );
} Else {
Alert ( " This is IE browser! " );
}
</SCRIPT>