JavaScript Object.assign() Method18 Mar 2025 | 1 min read The Object.assign() method is used to copy the values of all enumerable own properties from one or more source objects to a target object. Objects are assigned and copied by reference. It will return the target object. Syntax:Parametertarget: The target object. sources: The source object(s). Return value:This method returns the target object. Browser Support:
Example 1Output: 3 5 1 2 Example 2Output: 33 5 Example 3Output: 3 5 23 1 Next TopicJavaScript Objects |
JavaScript Object.getOwnPropertyNames() Method The Object. returns an array of all properties (except those non-enumerable properties which use symbol) found directly upon a given object. Syntax: Object.getOwnPropertyNames(obj) Parameter: obj: It is the object whose enumerable and non-enumerable own properties are to be returned. Return value: This method returns an array of string that...
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JavaScript Object.entries() Method JavaScript is used to return an array of a given object's own enumerable property [key, value] pairs. The ordering of the properties is the same as that given by looping over the property values of the object manually. Syntax: Object.entries(obj) Parameter Obj: It is an object whose...
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JavaScript Object.defineProperty() Method The defines a new property directly on an object and returns the object. To change the flags, we can use Object.defineProperty. We cannot change it back, because define property doesn?t work on non-configurable properties. Syntax: Object.defineProperty(obj, prop, descriptor) Parameter Obj: The Object on which to define the...
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JavaScript Object.is() Method The of JavaScript is used to determine whether two values are the same value. There is a special built-in method that compares values. Syntax: Object.is(value1, value2); Parameter value1: The first value to compare. value2: The second value to compare. Return value: This method returns a Boolean indicating whether or not...
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JavaScript Object.entExtensions() Method The Object.entExtensions() only ents the addition of new properties from ever being added to an object (i.e., ents future extensions to the object). This change is a permanent that means once an object has been made non-extensible, it cannot make extensible again. Syntax: Object.entExtensions(obj) Parameter: obj: It is...
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JavaScript Object.getOwnPropertyDescriptor() Method The Object.getOwnPropertyDescriptor method allows to query the full information about a property and returns a property descriptor for an own property (that is, one directly present on an object and not in the object's prototype chain) of a given object. Syntax: bject.getOwnPropertyDescriptor(obj, prop) Parameter obj: It is the...
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JavaScript Object.getPrototypeOf() Method The of JavaScript returns the prototype (i.e. the value of the internal [[Prototype]] property) of the specified object. Syntax: Object.getPrototypeOf(obj) Parameter obj: It is an object whose prototype is to be returned. Return value: This method returns the prototype of the given object. If there are no inherited properties,...
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JavaScript Object.values() Method The Object.values() returns an array which contains the given object's own enumerable property values, in the same order as that provided by a for...in loop. Syntax: Object.values(obj) Parameter: obj: It is the object whose enumerable own property values are to be returned. Return value: This method returns an array of...
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JavaScript Object.create() Method The is used to create a new object with the specified prototype object and properties. We can create an object without a prototype by Object.creates (null). Syntax: Object.create(prototype[, propertiesObject]) Parameter prototype: It is the prototype object from which a new object has to be created. propertiesObject: It is...
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JavaScript Object.seal() Method The of JavaScript seals an object which ents new properties from being added to it and marks all existing properties as non-configurable. The object to be sealed is passed as an argument, and the method returns the object which has been sealed. Syntax: Object.seal(obj) Parameter: obj: It...
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