check if variable is empty javascript code example
Example 1: is var is not blank then display value in javascript
if(data !== null && data !== '') {
// do something
}
Example 2: javascript check if object is null or empty
if (typeof value !== 'undefined' && value) {
//deal with value'
};
Example 3: 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).
}
Example 4: javascript check if variable is empty
if( value ) {
//
}
/**
* This will evaluate to true if value is not:
* null
* undefined
* NaN
* empty string ("")
* 0
* false
*/