if not empty js code example
Example 1: js if string not empty
if (!str.length) { ...
Example 2: javascript check if variable is empty
if( value ) {
//
}
/**
* This will evaluate to true if value is not:
* null
* undefined
* NaN
* empty string ("")
* 0
* false
*/
Example 3: javascript check if empty
//check if string is undefined
if (typeof myVar === 'undefined'){
console.log("I am not defined");
}
//check if string is empty, null, or 0
var emptyString="";
if (emptyString) {
console.log("im not empty");
}