JavaScript не нулевой
if (variable !== null) {
console.log("Var is NOT null");
}
TC5550
if (variable !== null) {
console.log("Var is NOT null");
}//Even if the value is 0, this will execute.
if (myVar !== null) {...}
//If you don't want it to execute when it's 0, then set it as
if (myVar) {...}
//This will return false if var value is 0.if(data !== null && data !== '') {
// do something
}if(variable == null) //variable is undefined or null