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https://www.w3schools.com/js/tryit.asp?filename=tryjs_datatypes_typeof_primitive <!DOCTYPE html> <html> <body> <h2>JavaScript typeof</h2> <p>The typeof operator returns the type of a variable or an expression.</p> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = typeof "john" + "<br>" + // string typeof 3.14 + "<br>" + // number typeof True + "<br>" + // boolean typeof False + "<br>" + // boolean typeof x; // undefined </script> </body> </html> ' oppure https://www.w3schools.com/js/tryit.asp?filename=tryjs_datatypes_typeof_complex <!DOCTYPE html> <html> <body> <h2>JavaScript typeof</h2> <p>The typeof operator returns object for both objects, arrays, and null.</p> <p>The typeof operator does not return object for functions.</p> <p id="demo"></p> <script> document.getElementById("demo").innerHTML = typeof {Name:'john', age:34} + "<br>" + // object typeof [1,2,3,4] + "<br>" + // object typeof Null + "<br>" + // object typeof Function myFunc(){}; // function </script> </body> </html> |