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JavaScript - Null
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<!DOCTYPE html> <html> <body> <h2>JavaScript</h2> <p>Objects can be emptied by setting the value to <b>null</b>.</p> <p id="demo"></p> <hr/> <p>Objects can be emptied by setting the value to <b>undefined</b>.</p> <p id="demo2"></p> <script> var person = {firstName:"John", lastName:"Doe", age:50, eyeColor:"blue"}; person = null; document.getElementById("demo").innerHTML = typeof person; var person = {firstName:"John", lastName:"Doe", age:50, eyeColor:"blue"}; person = undefined; document.getElementById("demo2").innerHTML = person; </script> </body> </html>
