javascript value not null or undefined code example
Example 1: javascript check if 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.
Example 2: javascript check if object is null or empty
if (typeof value !== 'undefined' && value) {
//deal with value'
};