JavaScript – Array unshift() Method
The Array unshift() method adds new elements to the beginning of an array, overwriting the original array.
JavaScript – Array valueOf() Method
The Array valueOf() method returns the value of the array (contents), and does not change the original array.
JavaScript – Boolean constructor Property
The Boolean constructor property returns the function that created the Boolean prototype.
JavaScript – Boolean.prototype Property
The Boolean prototype property allows you to add new properties and methods to existing booleans.
JavaScript – Boolean toString() Method
The Boolean toString() method returns a string from the boolean.
JavaScript – Boolean valueOf() Method
The Boolean valueOf() method returns the primitive value of a boolean.
JavaScript – Class constructor Method
The Class constructor() method is for creating and initializing objects created within a class.
JavaScript – Class extends Keyword
The Class extends keyword is used to create a child class of a parent class, which then inherits all the methods from the parent class.
JavaScript – Class static Keyword
The Class static keyword defines static methods for classes, which are then called directly on the class without creating an instance.
JavaScript – Class super Keyword
The Class super keyword is used to call the constructor of its parent class to access the parent’s properties and methods.
JavaScript – console.assert() Method
The console.assert() method writes a message to the console if an expression evaluates to false.
JavaScript – console.clear() Method
The console.clear() method clears the console, and depending on the browser, may write “Console was cleared” in the console.
JavaScript – console.count() Method
The console.count() method counts the number of times console.count() is called and writes the number to the console.
JavaScript – console.error() Method
The console.error() method writes an error message to the console, which can be useful for testing purposes.
JavaScript – console.group() Method
The console.group() method starts a message group, and all new messages will be written inside this group.
JavaScript – console.groupCollapsed() Method
The console.groupCollapsed() method starts a collapsed message group (which can be expanded), and all new messages will be inside this group.
JavaScript – console.groupEnd() Method
The console.groupEnd() method ends a console message group created with the console.group() method.
JavaScript – console.info() Method
The console.info() method writes a message to the browser console.
JavaScript – console.log() Method
The console.log() method logs a message to the browser console, which is useful for testing purposes.