What are the object methods in javascript

Object methods in JavaScript: assign(), create(), entries(), freeze(), getPrototypeOf(), is(), keys(), seal(), values(), isSealed() etc.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

javascript object method

• Object.assign()

  Create a new one by copying one or more objects object.

• Object.create()

  Creates a new object using the specified prototype object and properties.

• Object.defineProperty()

  Add a property to the object and specify the configuration of the property.

• Object.defineProperties()

  Add multiple properties to the object and specify their configuration respectively.

• Object.entries()

  Returns a [key, value] array of the given object's own enumerable properties.

• Object.freeze()

  Freeze object: No other code can delete or change any properties.

• Object.getOwnPropertyDescriptor()

  Returns the property configuration specified by the object.

• Object.getOwnPropertyNames()

  Returns an array that contains all enumerable or non-enumerable property names of the specified object.

• Object.getOwnPropertySymbols()

  Returns an array that contains all the symbol properties of the specified object itself.

• Object.getPrototypeOf()

  Returns the prototype object of the specified object.

• Object.is()

  Compares whether two values are the same. All NaN values are equal (this is different from == and ===).

• Object.isExtensible()

  Determine whether the object is extensible.

• Object.isFrozen()

  Determine whether the object has been frozen.

• Object.isSealed()

  Determine whether the object has been sealed.

• Object.keys()

  Returns an array containing the names of all the enumerable properties of the given object itself.

• Object.preventExtensions()

  Prevent any extension of the object.

• Object.seal()

  Prevent other code from deleting the object's properties.

• Object.setPrototypeOf()

  Sets the object's prototype (i.e. the internal [[Prototype]] property).

• Object.values()

  Returns an array of the given object's own enumerable values.

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