javascript variable null of undefined or empty code example
Example 1: javascript check if object is null or empty
if (typeof value !== 'undefined' && value) {
//deal with value'
};
Example 2: javascript check if undefined or null or empty string
// simple check do the job
if (myString) {
// comes here either myString is not null,
// or myString is not undefined,
// or myString is not '' (empty).
}