Probably the most basic topic on the list. One of the most important, maybe the most important one. If you do not know how to proceed with your code, you will have a hard time. Knowing the ins and outs of basic control flow is definitely a must.
1 . if else — If you don’t know these, how did you write code before?
2 . switch — is basically if else in a more eloquent way, use it as soon as
you have multiple of different cases.
3 . for — Do not repeat yourself, this is what loops are for. Besides the
for of and for in come in very handy. The big advantage of for -loops is that they are blocking, so you can use async await in them.
This took a while for me. It does not matter if you are working on frontend or backend, the first year or so, you will probably default to console.log or maybe console.error for ‘handling’ errors. To write good applications, you definitely have to change that and replace your lazy logs with nicely handled errors. You may want to check out how to build your own Error constructor and how to catch them correctly, as well as showing the user what the actual problem is.
Similar to moving through your application continuously, you have to decide where to group specific information chunks and where to keep them separate. This does not only apply to building database models, but also function parameters and objects or variables.
Similar to the functional approach, you also have to get familiar with object
time in my career and just worked my way through with a workaround, but
sometimes it is definitely better to use objects/classes and instances to
implement specific functionality. Classes are widely used in React, MobX or
The big three are React.js, Angular and Vue.js. If you are looking for a job
nowadays, you will almost always have one of those listed as a prerequisite.
Even if they change quite quickly, it is important to grasp the general concept of those to understand how applications work. Also, it is just easier to write apps that way. If you haven’t decided which train you want to jump on, my suggestions is React.js. I have been working with it for the last couple of years and did not regret my decision.
Unfortunately, this is a big part of web development. On the one hand I should not say unfortunate, because it is great to be able to write code with all the newest features. On the other hand, the reason why I’m saying that is that we always have to keep in mind that there’s older browsers around that may not support these features, therefore we have to transpile our code into something else that the old browsers understand. If you work with node.js, you will probably have less exposure to transpiling your code. The de-facto standard for transpilation is babel.js, so get familiar with it. As for bundling your code and tying everything together, you have a couple of options. Webpack was the dominant player for a long time. Some time ago, parcel popped up out of nowhere and is now my preferred solution, since it is so performant and easy to configure, although not perfect.
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