how check type of object code example
Example 1: is string javascript
function isString(value) {
return typeof value === 'string' || value instanceof String;
}
isString(''); // true
isString(1); // false
isString({}); // false
isString([]); // false
isString(new String('teste')) // true
Example 2: javascript find type of variable
> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"
if(typeof bar === 'number') {
//whatever
}