how to check the type in javascript code example
Example 1: javascript how to know type of variable
var foo = "Hello";
console.log(typeof foo);
Example 2: get type of var js
function doSomething(x) {
if(typeof(x) === 'string') {
alert('x is a string')
} else if(typeof(x) === 'number') {
alert('x is a number')
}
}
Example 3: node js check type of variable
if (typeof i != "number") {
console.log('This is not number');
}
Example 4: get type of var js
var x = 12345;
console.log(typeof x)
x = 'string';
console.log(typeof x)
x = { key: 'value' };
console.log(typeof x)