A few special operators in JS

concatenation operator +

Console.log (' Hello ' +3+ ' world ');

Show results as

Hello3worldLook again

Console.log (3+2+4+ ' hello ' +5); // 9hello5

From left to right overtime, after encountering the first non-numeric type, the back is all understood as splicing operation

2 in JS, the logical operation returns the first value that allows an expression to be set

    var  false ;         var b =6;         var c = (A | | b);        Console.log (c); // result is 6

var e =false; var f =&& f); // The result is false

A few special operators in JS