The JavaScript Set has() method indicates whether the Set object contains the specified value element. Syntax: setObj.has(value) Parameters: value: It represents the value of the element whose presence has to be checked in the Set object. Return: It returns true if the specified element is in the set otherwise returns false. Example: <!DOCTYPE html> <html> … Read more
The JavaScript Set forEach() method executes the specified function once for each value. Syntax: setObj.forEach(callback(currentValue, currentKey, Set)) { // code to be executed } Parameters: callback: It represents the function to be executed for each element, taking three arguments: (currentValue, currentKey, and set). thisArg: It represents this keyword for the function. Example: <!DOCTYPE html> <html> … Read more
The JavaScript Set entries() method gives an object of Set iterator that contains an array of [value, value] for each element. As there is no concept of key in a set that’s why value and key are the same. Note: The iterator object maintains the insertion order. Syntax: setObj.entries() Return: An iterator object that contains … Read more
The JavaScript Set delete() method deletes or removes only the selected elements from the Set object. Syntax: setObj.delete(value) Parameters: value: It represents the value of the specified property to be deleted. Return: It returns true if the specified element is deleted or removed successfully otherwise, it returns false. Example: <!DOCTYPE html> <html> <body> <script> var … Read more
The JavaScript Set clear() method clears or removes all the elements from the Set object. Syntax: setObj.clear() Example: <!DOCTYPE html> <html> <body> <script> var jewels = new Set(); jewels.add(“DIAMOND”).add(“GOLD”).add(“PLATINUM”).add(“SILVER”); for (let i of jewels) { document.write(i+”<br>”); } jewels.clear(); document.write(jewels.size); </script> </body> </html>
The JavaScript Set add() method is used to add the new element with the specified value to the Set object. A new object will be added to the end of the Set object. Syntax: setObj.add(value) Parameters: value: It represents the value of the element to be added to a set object. Return: Modified set object. … Read more
The JavaScript Reflect.setPrototypeOf() method sets the prototype of an object to another object. It is similar to Object.setPrototypeOf(). Syntax: Reflect.setPrototypeOf(target, prototype) Parameters: target: It represents the object whose prototype has to be set. prototype: It represents the object’s new prototype. Return: It returns true if the object’s new prototype is set successfully otherwise, it returns … Read more
The JavaScript Reflect.set() method sets the value of the property of an object. Syntax: Reflect.set(target, propertyKey, value[, receiver]) Parameters: target: It represents the object on which to set the property. propertyKey: It represents the name of the property to set. value: It represents the value of the set corresponding to the specified property. receiver: It … Read more
The JavaScript Reflect.preventExtensions() method prevents any future extensions to an object i.e. prevents addition and modification of properties. It is It is similar to Object.preventExtensions(). Syntax: Reflect.preventExtensions(target) Parameters: target: It represents the object that prevents extensions. Return: It returns true if the target object was successfully set to prevent extensions otherwise returns false. Note: It … Read more
The JavaScript Reflect.ownKeys() method gives an array whose values represent the keys of the properties of an object. It includes only the object’s direct properties. Syntax: Reflect.ownKeys(target) Parameters: target: It represents the object from which to get the own keys. Return: It returns an array of the target object’s own property keys. Note: It throws … Read more