is not empty javascript code example
Example 1: is var is not blank then display value in javascript
if(data !== null && data !== '') {
// do something
}
Example 2: js if string not empty
if (!str.length) { ...
Example 3: javascript if string empty
// Test whether strValue is empty or is None
if (strValue) {
//do something
}
// Test wheter strValue is empty, but not None
if (strValue === "") {
//do something
}
Example 4: empty string in javascript
var s; // undefined
var s = ""; // ""
s.length // 0
Example 5: javascript check if variable is empty
if( value ) {
//
}
/**
* This will evaluate to true if value is not:
* null
* undefined
* NaN
* empty string ("")
* 0
* false
*/