Is it possible to make a search by querySelectorAll using multiple unrelated conditions? Yes, because querySelectorAll accepts full CSS selectors, and CSS has the concept of selector groups, which lets you specify more than one unrelated selector. For instance: var list = document.querySelectorAll(“form, p, legend”); …will return a list containing any element that is a … Read more
Yes, the || operator has higher precedence than the conditional ?: operator. This means that it is executed first. From the page you link: Operator precedence determines the order in which operators are evaluated. Operators with higher precedence are evaluated first. Let’s have a look at all the operations here: step = step || (start … Read more
The || operator evaluates to the right-hand side if and only if the left-hand side is a falsy value. The ?? operator (null coalescing) evaluates to the right-hand side if and only if the left-hand side is either null or undefined. false, 0, NaN, “” (empty string) are for example considered falsy, but maybe you … Read more
All your multiple comparisons that look like this: if (sct == (“Sine” || “Cosine” || “Tangent”)) need to be changed to this: if (sct == “Sine” || sct == “Cosine” || sct == “Tangent”) To explain, when you do this (“Sine” || “Cosine” || “Tangent”), that evaluates to just “Sine” so if (sct == (“Sine” … Read more
The OR operator || uses the right value if left is falsy, while the nullish coalescing operator ?? uses the right value if left is null or undefined. These operators are often used to provide a default value if the first one is missing. But the OR operator || can be problematic if your left … Read more
The condition (c != ‘o’ || c != ‘x’) can never be false. If c is ‘o’, then c != ‘x’ will be true and the OR condition is satisfied. If c is ‘x’, then c != ‘o’ will be true and the OR condition is satisfied. You want && (AND), not || (OR): while … Read more