JavaScript message box effect [Implementation code]

Warning box

alert();

Confirm box

 var message=confirm("Do you like javascript"); if(message==true){ document.write("Good, come on");}else{ document.write("js is powerful, you need to learn");}

Question box

prompt("text","default");

 var myname=prompt(please enter your name); if(myname!=null){ alert("Hello"+myname);}else{ alert("Hello my friend");}

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