typeof string check javascript code example
Example 1: 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 2: type of javascript
if (typeof(value) !== "undefined") {
}
Example 3: 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)
Example 4: javascript check type of variable var
> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"