Is JavaScript really a bad language?
javascript itself, by the mean of syntax and semantic, is not exactly bad. A little too verbose, maybe. Here are the things that make javascript nasty and terrible: 1- Implementations of browsers that make javascript code cannot easily run across browsers, even cannot run reliably cross multi versions of a browsers.
Why is JavaScript considered bad?
javascript is dynamically and loosely typed, which is bad for application reliability. javascripts prototypical inheritance is strange compared to the usual class inheritance. javascripts prototypical inheritance is strange compared to canonical examples like self.
Is there an alternative to JavaScript?
Python is one of the most popular alternatives to JavaScript for backend development. The Python language has a very simple syntax that easy to grasp for the newbies too. It gives more clarity as the language is very easy to read and anyone working with you on your code can easily understand it.
How is JavaScript really interpreted or compiled language?
JavaScript code needs a tool (JS engine) installed in your machine (node, browser) to get executed. This is what interpreted languages want. Compiled language products are free to be executed directly. Hoisting etc are not like code modification. There is no intermediate code for that.
Why are global variables considered bad practice in JavaScript?
For further reading and a more in-depth explanation of why globals are considered bad practice, you may want to check out this page. Global variables can significantly increase coupling, significantly reduces the scalability and testability of your code.
Is there a just in time compiler for JavaScript?
JIT or just in time compilers are not specific to JavaScript. Other languages like Java also has these kind of mechanism to compile the code just before the execution. The modern JavaScript engines also has JIT. Yes, they have a compiler. Now let me explain you why they need JIT and how it works in JavaScript execution.
Why is document.write considered a ” bad ” JavaScript?
.write is considered a browser violation as it halts the parser from rendering the page. The parser receives the message that the document is being modified; hence, it gets blocked until JS has completed its process. Only at this time will the parser resume. The biggest consequence of employing such a method is lowered performance.