JS Tutorial
JS HOME JS Introduction JS How To JS Output JS Statements JS Comments JS Variables JS Data Types JS Objects JS Functions JS Operators JS Comparisons JS Conditions JS Switch JS Loop For JS Loop While JS Breaks JS Errors JS ValidationJS HTML DOM
DOM Intro DOM HTML DOM CSS DOM Events DOM NodesJS Objects
JS Object JS Number JS String JS Date JS Array JS Boolean JS Math JS RegExpJS Window
JS Window JS Screen JS Location JS History JS Navigator JS PopupAlert JS Timing JS CookiesJS Libraries
JS Libraries JS jQuery JS PrototypeJS Examples
JS Examples JS Objects Examples JS Browser Examples JS DOM Examples JS Quiz JS Certificate JS SummaryJS References
JavaScript Objects HTML DOM ObjectsJavaScript Objects Examples
Examples of using the built-in JavaScript objects.
String Object
Find the length of a string
Find 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 number of milliseconds 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
Join two arrays - concat()
Join three arrays - concat()
Join all elements of an array into a string - join()
Remove the last element of an array - pop()
Add new elements to the end of an array - push()
Reverse the order of the elements in an array - reverse()
Remove the first element of an array - shift()
Select elements from an array - slice()
Sort an array (alphabetically and ascending) - sort()
Sort numbers (numerically and ascending) - sort()
Sort numbers (numerically and descending) - sort()
Add an element to position 2 in an array - splice()
Convert an array to a string - toString()
Add new elements to the beginning of an array - unshift()
More Array object examples in our JavaScript reference.
Boolean Object
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
General
Use a for...in statement to loop through the elements of an object
More Math object examples in our JavaScript reference.
W3Schools' Online Certification
The perfect solution for professionals who need to balance work, family, and career building.
More than 10 000 certificates already issued!
The HTML Certificate documents your knowledge of HTML.
The HTML5 Certificate documents your knowledge of advanced HTML5.
The CSS Certificate documents your knowledge of advanced CSS.
The JavaScript Certificate documents your knowledge of JavaScript and HTML DOM.
The jQuery Certificate documents your knowledge of jQuery.
The XML Certificate documents your knowledge of XML, XML DOM and XSLT.
The ASP Certificate documents your knowledge of ASP, SQL, and ADO.
The PHP Certificate documents your knowledge of PHP and SQL (MySQL).
Your suggestion:
Close [X]
Thank You For Helping Us!
Your message has been sent to W3Schools.
Close [X]
