javascript string is empty code example
Example 1: js if string not empty
if (!str.length) { ...
Example 2: 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 3: empty string in javascript
var s; // undefined
var s = ""; // ""
s.length // 0
Example 4: 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");
}