javascript if null or empty code example
Example 1: javascript check if object is null or empty
if (typeof value !== 'undefined' && value) {
};
Example 2: javascript check if null
if (variable === null) {
}
if (variable == null) {
}
Example 3: javascript syntax for check null or undefined or empty
if (typeof value !== 'undefined' && value) {
};
Example 4: javascript check for null variables
var myVar=null;
if(myVar === null){
}
if (typeof myVar === 'undefined'){
}
Example 5: javascript check if undefined or null or empty string
if (myString) {
}
Example 6: javascript check if empty
if (typeof myVar === 'undefined'){
console.log("I am not defined");
}
var emptyString="";
if (emptyString) {
console.log("im not empty");
}