Page 165 - DCAP202_Fundamentals of Web Programming

Fundamentals of Web Programming

Notes document.write(“Book name is : “ + book.subject + “<br>”);
document.write(“Book author is : “ + book.author + “<br>”);
</script>
</body>
</html>

Task Give examples of Math object and Date object.

Self Assessment

Fill in the blanks:
11. All user-defined objects and built-in objects are descendants of an object called
.............................
12. The .......................... operator is used to create an instance of an object.
13. A ............................ is a function that creates and initializes an object.

14. The ............................... contains a reference to the new object.
15. The properties assigned to the object are not variables and are not defined with the
............................... keyword.

13.6 Summary

 In JavaScript, an object is a standalone entity, with properties and type.
 JavaScript’s Math object properties are treated as constants.
 The Date object is useful when you want to display a date or use a timestamp in some sort
of calculation.
 JavaScript objects are collections of properties and methods. A method is a function that is
a member of an object.

 A method is a function that is a member of an object.
 All objects in JavaScript support “expando” properties and methods, or properties that can
be added and removed at run time.

 JavaScript provides all sorts of shortcut ways of specifying your code which makes the
code quicker to write.

 JavaScript provides all sorts of shortcut ways of specifying your code which makes the
code quicker to write.

13.7 Keywords

charAt(): This is a method returns the character at the index specified.
getHours(): Returns the hour

getMinutes(): Returns the minutes
getSeconds(): Returns the seconds

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