- Closures. Closures use inner functions to give you an idea of an outer function’s scope. Functions can include generic helper functions and asynchronous functions.
- Scope. The scope is a box with boundaries for functions, variables, and objects. The boundary restricts variables and decides if you can access variables or not. Also, it limits the availability or visibility of a variable. Developers need to understand this concept to be able to separate logic in a code and improve its readability.
Web Server Creation
App Response Time
Support for External Apps
Place Scripts Below the Page
The main goal here is to ensure that your page loads fast for the user. While loading a script, browsers cannot continue unless the entire file is loaded. This is why the user may have to wait before they can view an entire web page. Add the scripts at the bottom of the page before the body tag to help solve this issue.
Avoid Using “Undefined”
Organize and Initialize Declarations
This is why it is not ideal to add “undefined” to declarations as a value. It is also not ideal to leave them without any value because they are already “undefined” automatically. To be safe, if you can avoid declarations, do not use them. When you have too many declarations, it may also give other developers a hint that you are not skilled in your profession.
Comments are used for several reasons, but the most important one is to explain something that is abnormal, uncommon, or requires some context for proper understanding. You can also use comments to indicate where something needs to be fixed in the future.
Comments can also be added to modules in a codebase explaining the intention or architecture behind the code. Even if it is a short three-letter name, use something with meaning to reduce the burden on other developers.
Opt for Promises Over Callbacks
Avoid Chaining Loops and Unreadable Hacks
Chaining loops and chain iteration methods increase code complexity. This can present problems because it will slow things down when your data grows. In some cases, chaining loops may be required, but it is ideal to avoid the practice entirely. Be sure to assess your looping strategy because it helps you to determine if there are combined loops or unnecessary loops.
Unreadable hacks are also not ideal because they are abnormal and unconventional. Many developers add them, but it is better to follow the best practices of any tool you are using. Therefore, unless it is necessary, do not chain loops or use unreadable hacks.
Check Automatic Type Conversions
Always check automatic type conversions because you may end up with something you didn’t intend to create. In most cases, “falsy values” turn false while “truthy” values turn true. With numbers, “falsy values” turn to “zero” while “truthy” turns to “one.”
While working with data from an API or user you are not sure of, ensure that it is in the right format and type before starting to work on it. Check the conversions and reduce your overall workload.
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IIFE stands for Immediately Invoked Function Expression. This is simply a way to execute various functions immediately after they are created. They come in handy because they do not pollute the global object. Also, they make it easier to isolate variable declarations.
IIFE makes it easier to execute things quickly, and it can be used to plan your setup before the code is up and running. It also uses a simple API to initialize small libraries so developers can encapsulate complex logic in the code or expose objects that can be used to interact.
These courses will teach coding practices to give students a clearer understanding of the bigger picture. Students use this knowledge in place of work experiences when they craft their portfolios. The programs are short, and within a few months, students can master all they need to enter the field.
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