Questions tagged [falsy]

I have the following problem: const barcodeValue = element.dataset.barcode; // the above value is sent as an argument to be verified by the function below.. if(!barcodeValue){ // run code } now dataset.barcode comes from the database...…

I just solved this challenge on freecodecamp Remove all falsy values from an array. Return a new array; do not mutate the original array. Falsy values in JavaScript are false, null, 0, "", undefined, and NaN. Hint: Try converting each value to a…

So I was playing around with document in JavaScript, as an alternate way of using document.getElementById. But why does document.all equal null? I ran a few commands to prove it's even more 'falsy'. document.all //…

In the following examples both ex1 & ex2 variables will render an empty string with a space and not a falsy value. Whereas ex3 will be falsy and render the right side of the || operator. How can I test for empty string in the first two examples…