Sub Resource Integrity (SRI) is a security feature that can be used to validate that the resources that the browser is fetching have not been manipulated. But why do you need it? Remember that script tag that you keep throwing at random places in your code? What if someone got...
When it comes to performance of applications, measuring performance becomes important. For anything to be optimized, it must be measured first, optimized, and measured again to capture gains. Measuring JavaScript execution time thus becomes one of these steps. Modern browsers and the Node.js platform provide various API’s to measure code...
Writing performant code is not enough as a developer. We need to ensure that it is readable as well. And it is rare that an API change in a language introduces readability. Numeric Separators are one such rare change. Why numeric Separators? Reading this takes a few seconds: Counting the...
JavaScript promises do not have any time associated with them. We can use a .then() function and wait until the promise is resolved or rejected. We can even await it, and either of those works if the async task finishes in a reasonable amount of time. But in the case...
Having consistency and enforcing coding standards becomes very important as an application scales. It becomes important to automate the process to ensure quality standards and make the application maintainable. ESLint and Prettier can be used to define these standards, but we also need a tool to enforce them. Husky provides...
If you have been using React for a while, you are familiar with how state update works. There are a lot of internal optimizations that React makes for faster rendering. One of the implementation details of the React internals is that it checks whether the given state object has actually...
TypeScript provides some built-in utility types that help facilitate transformations of types from one form to another. These utilities are available globally. They can be quite handy in various situations. TypeScript generics Before understanding the TypeScript utility types, it is important to understand type aliases and generics. You can create...
Once we start exploring TypeScript, we start using interfaces and types without really understanding the differences between them. I am guilty of doing that as well. It is simple to get started with them and keep using them. But, at some point, it becomes important to know the difference between...
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