is empty string falsey
There are only six falsey values in JavaScript:
- undefined
- null
- NaN
- 0
- "" (empty string),
- false
is empty string falsey
There are only six falsey values in JavaScript:
- undefined
- null
- NaN
- 0
- "" (empty string),
- false
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
}
javascript null or empty
var myVar=null;
if(myVar === null){
//I am null;
}
if (typeof myVar === 'undefined'){
//myVar is undefined
}
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