But async-await in the promises helps to control the behaviour and make the code asynchronous. This means that we do not have to wait for a long function to execute first and then the shorter to execute.
This keyword: People do not understand this keyword properly, because it sometimes refers to the global object and sometimes to the object to which it belongs.
But in short, this keyword refers to the object it belongs to. But in the case of a function, it refers to the global object. For example, we have an object person. We then defined the name, and age key and the values of the name and the age key. And then we say return this.name + ” is ” +this.age+ ” years old “. Here this refers to the person object.
Fetch: Fetch helps to access the data from the different networks. For example, there is an API (Application Programming Interface) containing a list of animals and their sounds.
We can then fetch the API and get animals with their sounds. For the request type fetch (‘the HTTP’). Then we get the response mostly in the form of JSON, which we can use by parsing it.
- Less practise:
As discussed some concepts are typical and they need some time to master. For example, we fetched an API and got the response in JSON form. We then parsed it and got an object. Then if we have not practised how to work with objects and arrays then how could we use that data. We must know some concepts like spread operator, for each, for of, for in, etc. So in those similar cases, it becomes necessary for us to take the help.
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Let’s wrap it up!