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Functions and conditions are some of the basic building blocks of javascript. Functions ensure that we dont repeat ourselves when writing code. Conditions ensures that we can handle different cases when programming.

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Array's has lots of helper functions, that is used all the time when developing js applications. It is super helpful to be able to **manipulate an array** like **removing elements** or **adding elements** at specific indexes. Another helpful function of arrays is to know **where a specific item is** in the array.

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Understanding the basics of Javascript is SUPER important. Therefore this homework focuses on repeating the basics to really have a solid understanding of this.

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**Interacting with the DOM is a crucial part** of building a website. If we cannot interact with the DOM and the javascript we write cannot be used in a browser. **Connecting javascript to the browser opens up a new world of possibilities** where only the imagination is the limiting factor.

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Working with arrays is an essential part of being a javascript developer. A lot of the time js developers have an array of some objects. That could be **users, products, posts, jobs** etc. Working with these arrays, js developers so often need to filter the arrays, change the structure of the array, sort them or loop through them.

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Working with functions in javascript is such an essential part of working with javascript.

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Working with json and api's is the way modern **javascript application's communicate with servers**. That can be either getting some data but also updating or creating new data.

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Promises creates a **pleasant way of working with asynchronous code**. It will make your asynchronous code nearly look synchronous. It is possible to compose promises further developing the function part of javascript.

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Using classes help with structuring code. It is one of many **design patterns**. Second it **connects everything** you have learned in js: functions, properties, methods, keys, arrays.