JavaScript Objects Examples
Examples of using the built-in JavaScript objects.
String Object
Return the length of a string
Style strings
Return the position of the first occurrence of a text in a string - indexOf()
Search for a text in a string and return the text if found - match()
Replace characters in a string - replace()
More String object examples in our JavaScript reference.
Date Object
Use Date() to return today's date and time
Use getTime() to calculate the years since 1970
Use setFullYear() to set a specific date
Use toUTCString() to convert today's date (according to UTC) to a string
Use getDay() and an array to write a weekday, and not just a number
Display a clock
More Date object examples in our JavaScript reference.
Array Object
Create an array
Use a for...in statement to loop through the elements of an array
Join two arrays - concat()
Put array elements into a string - join()
Literal array - sort()
Numeric array - sort()
More Array object examples in our JavaScript reference.
Boolean Object
Check Boolean value
More Boolean object examples in our JavaScript reference.
Math Object
Use round() to round a number
Use random() to return a random number between 0 and 1
Use max() to return the number with the highest value of two specified numbers
Use min() to return the number with the lowest value of two specified numbers
Convert Celsius to Fahrenheit
More Math object examples in our JavaScript reference.
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