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uh Hello friends welcome to this video
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so in this video we will look at a
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JavaScript method which is object.
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assign this method allows you to copy
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the properties of an object from one
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object to another so this is actually
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the method that we will be talking about
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object. assign so this method is useful
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so let's suppose you have an object
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right here let me declare it obj1 and it
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has some properties such as name
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and then we have
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age so we have these two properties in
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this object
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obj1 we have the name property and the
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age property and uh now if I just
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console of this object you will actually
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see these two properties will be printed
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out so now the method this is obj
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assigned this method comes into the
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picture if you want to transfer some
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properties from one object to another so
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let's suppose I declare object two and
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declare some more
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properties now we have name age let's
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suppose we declare country as
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well and then the second property
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is
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runs so these are two additional
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properties so now if I want to transfer
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these properties into the parent object
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into this object this method comes to
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the picture which is object. assign so
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what does this method do it actually
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copies the properties of the second
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object to the first object so how we
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actually call this method it's really
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simple we simply write object do
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assign and here you need to pass the
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object
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one in which the properties need to be
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transferred so here we'll first of all
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pass object one and then from which
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object you want to transfer properties
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so from this obj2 you need to transfer
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these two properties into
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the so we simply write
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obj2 so it basically does the copy
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operation so the both these properties
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will be transferred into the first
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object so if you console log this now
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you will see two properties right here
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but now after this operation let me
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console log the same object obj1 once
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again now you will see after this
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operation after this method call which
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is object. assign now you will see a
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slight difference first of all we have
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two properties name and age now we have
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name Age Country and runs so now we have
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four properties so after this operation
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both these properties were transferred
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to the parent object it was copied
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successfully you can see this country
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and runs object these properties were
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transferred to the parent object this
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object was not modified this obj2 obj1
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was
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modified all these properties were
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merged into a single object were copied
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using this object. assign method so we
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basically passed the first object in
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which the properties need to be
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transferred and then the obj2 this is a
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second object object so
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here the properties these properties
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will be transferred to this object and
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then this object is
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changed so we see this output if you
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console log the obj2 it Remains the Same
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it doesn't get changed at all so it
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again contains these two properties so
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it doesn't get changed so now we can
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even declare
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obj3 so we can have some more additional
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properties so we can simply say here
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some other property let's
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suppose
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average and
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marks so let's suppose we want to also
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transfer these property as well so again
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you'll simply say
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obj3 so what you will see now you will
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also now see these three these two
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properties added which is average and
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Max to this
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obj1 so both the properties which were
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available in this obj 2 obj3 has been
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successfully copied and merged and if
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you see the output we have already we
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have name AG country and runs average
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you'll see all these things
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are transferred into the single object
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which was obj1 so in this way guys you
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can use this method which is object.
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assign to if you want to actually copy
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the properties of one object into
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another and you can pass multiple
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objects right here if you want to
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transfer the
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properties so in this way you can use
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this method it's really used in many
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applications I have personally used this
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method a lot of times in applications if
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you want to transfer properties from one
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object to another so thank you very much
5:24
for watching this video please hit that
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like button subscribe the channel and do
5:28
check out my website free mediat
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tools.com which contains audio video and
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will be seeing you in the next video
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