What does the || operator do?
The || or Logical OR operator finds the first truthy expression in its operands and returns it. This too employs short-circuiting to prevent unnecessary work. It was used before to initialize default parameter values IN functions before ES6 Default function parameters was supported.
console.log(null || 1 || undefined); //logs 1function logName(name) {var n = name || "Mark";console.log(n);}logName(); //logs "Mark"
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