Mar 26, 2013 · The variable will become what ever type you assign it. Initially it is undefined. If you assign it 'true' it will become a string, if you assign it true it will become a boolean, if you …

Oct 7, 2012 · JavaScript parsing boolean. 2. Javascript If statement with boolean value ... Evaluate boolean expression ...

Dec 31, 2014 · The reason this is unexpected is because new Boolean(false) returns an object. In JS, all objects evaluate to a truthy value. This is why your test alerted 'TRUE' since the 'if' …

Nov 20, 2014 · I am learning javascript and I want to initialize a boolean array in javascript. I tried doing this: var anyBoxesChecked = []; var numeroPerguntas = 5; for(int …

If you don't mind the boolean being converted to a number (that is either 0 or 1), you can use the Bitwise XOR Assignment Operator. Like so: bool ^= true; //- toggle value. This is especially …

Nov 5, 2008 · Use the strict equality operator (===), which doesn't make any implicit type conversions when the compared variables have different types. This will set isTrueSet to a …

Oct 10, 2016 · Boolean attributes. For boolean attributes, set the attribute with the same-named value: element.setAttribute('disabled', 'disabled'); Removing a boolean attribute works the …

Feb 11, 2015 · For reference, there are several other useful mechanisms of seeing changes, but they generally rely on properties of an object, not just a simple variable. See all the answers …

However my idea is that it is better to check whether the variable is a boolean or not, especially since Javascript is a loosetyped language. In the second example a string would also return …

Dec 6, 2014 · To change a boolean to its opposite value you can use negation (! ), for example x = !x means "set x to false if it's truthy or to true if it's falsy". If you want the function to toggle …