- Managing JS frameworks
- Building JS developers team
- Understanding of scope
- Concurrency model as well as the event loop
- Regular expression
- Memory management
Also, read our article about the latest trends in JS-based game development.
The closure is created when an inner function accesses its outer function variables and arguments. The internal function can access three scope chains: its variables, the external function’s variables and arguments, and global variables. For instance, an outer function has a variable a and returns the inner function, which utilizes this outer variable. Inner functions have access to their parent scope, even after the parent function has been executed.
Global variables are accessible and available for modification anywhere in the program, while access to local variables is available only inside the function declaration. Variables declared without a var keyword inside any function becomes global variables automatically.
The garbage collection algorithms rely on the concept of reference. This supposedly automatic resource freeing gives developers the false impression they can choose not to care about memory management. Global variables, forgotten timers, and closures are common root causes of memory leaks.
Know the whole ecosystem of software development
Managing JS frameworks
Depending on the project status and existing team, you may already have all technology stack chosen; otherwise, you may want to look for a Senior JS developer to build your project from scratch.
A middle JS programmer should be able to work effectively with the existing tools and frameworks on the project. If you decide to hire a junior coder, make sure that the candidate has experience working with your current tech stack.
Other Crucial Skills for a JS Programmer
- Debugging and testing frameworks
- Task runners and module bundlers
- Tools for managing asynchronous code
- Code linters and formatters
- Tools for working with Networking and HTTP-based APIs
- Package managers
Besides this, developers should know how to work with the browser API to be able to store data on the client, manipulate data, etc. Some projects may require visual representation with graphs or produce dynamic, interactive data visualizations, so your developers should have experience with such libraries as D3.js, Highcharts, and Chart.js.
Building JS developers team
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