JavaScript – Global isNaN() Method
The JavaScript isNaN() method returns true if a value is NaN (not a number).
JavaScript – Global Number() Method
The JavaScript Number() method converts a value to a number. If the value cannot be converted, NaN (not a number) is returned.
JavaScript – Global parseFloat() Method
The JavaScript parseFloat() method parses a value as a string and returns the first number.
JavaScript – Global parseInt() Method
The JavaScript parseInt() method parses a value as a string and returns the first integer.
JavaScript – Global undefined Property
The undefined property indicates that a variable has not been assigned a value, or not declared at all.
JavaScript – history.back() Method
The history.back() method loads the previous page in the browser history list. The history.back() method only works if a previous page exists.
JavaScript – history.forward() Method
The history.forward() method loads the next page in the browser history list. The history.forward() method only works if a next page exists.
JavaScript – history.go() Method
The history.go() method loads a specified page in the browser history list. The history.go() method only works if the specified page exists.
JavaScript – history.length Property
The history.length property returns the number of URLs in the history list of the current browser window.
JavaScript – JSON.parse() Method
The JSON.parse() method parses a string written in JSON format and returns a JavaScript object.
JavaScript – JSON.stringify() Method
The JSON.stringify() method converts JavaScript objects into strings.
JavaScript – location.assign() Method
The location.assign() method loads a new document in the current browser window.
JavaScript – location.hash Property
The location.hash property sets or returns the anchor part of a URL, including the # sign.
JavaScript – location.host Property
The location.host property returns the host (IP address or domain) and port of a URL.
JavaScript – location.hostname Property
The location.hostname property returns the host (IP address or domain) of a URL.
JavaScript – location.href Property
The location.href property sets or returns the entire URL of the current page.
JavaScript – location.origin Property
The location.origin property returns the protocol, hostname, and port number of a URL.
JavaScript – location.pathname Property
The location.pathname property returns the pathname of a URL.