JavaScript Object.is() Method4 Sept 2024 | 1 min read The Object.is() method of JavaScript is used to determine whether two values are the same value. There is a special built-in method that compares values. Syntax:Parametervalue1: The first value to compare. value2: The second value to compare. Return value:This method returns a Boolean indicating whether or not the two arguments are the same value. Browser Support:
Example 1Output: false Example 2Output: false true Example 3Output: true false Next TopicJavaScript Objects |
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.assign() Method The 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: Object.assign(target, sources) Parameter target: The target object. sources: The source object(s). Return...
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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.freeze() Method The freezes an object that ents new properties from being added to it. This method ents the modification of existing property, attributes, and values. Syntax: Object.freeze(obj) Parameter Obj: The object to freeze. Return value: This method returns the object that was passed to the function. Browser Support: Chrome 45.0 Edge 12.0 Firefox 32.0 Opera No Example 1 const object1 =...
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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.defineProperties() Method The defines new or modifies existing properties directly on an object, and returning the object. Syntax: Object.defineProperties(obj, props) Parameter Obj: The object on which to define or modify properties. Props: An object whose own enumerable properties constitute descriptors for the properties to be defined or modified. Return: This method reruns...
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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.setPrototypeOf() Method The sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or null. All JavaScript objects inherit properties and methods from a prototype. It is generally considered the proper way to set the prototype of an object. Syntax: Object.setPrototypeOf(obj, prototype) Parameters: obj:...
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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.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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