js best way to check if string is empty code example
Example 1: javascript regex check if string is empty
function IsEmptyOrWhiteSpace(str) {
return (str.match(/^\s*$/) || []).length > 0;
}
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).
}