November 3, 2020
Deno: is it better than Node JS?
Deno explicitly takes on the role of both run time package managers within a single executable, rather than requiring a separate package management program. Among the most important of Deno’s features is its focus is on security. Deno by default executes the code in a sandbox, which means that runtime has no access to:
- The File System
- The Network
- Execution of Other Scripts
- The Environment Variables
Node.JS is primarily used to build network programs such as Web Servers. Node JS is officially supported on Linux, Mac OS, and Windows 8.1 and server 2012, with tier 2 support for Smart OS and IBM AIX.
According to Dahl, who after all did design both Node JS and Deno, Node JS sufferers from three major design issues:
- A Poorly design module system, with centralized distribution;
- Lot’s of legacy API that must be supported
- And lack of security.
The way Deno improves security over Node JS is simple. By default, Deno won’t let a program access disk, network subprocesses, or environmental variables. Another security improvement by Deno is that it always dies on uncaught errors, unlike Node js, which will allow execution to proceed after uncaught errors with results that may not be predictable.
In Node JS, you load common JS modules using the required keyword and they all standard and third party alike, implicitly come from npmjs.com. In Deno, you can load ES modules using the import keyword and explicitly state the URL.
At this point, Deno is a reasonable and fun environment to use for building small private scripting projects in TypeScript. According to Dahl, Deno will never really affects the success of Node JS.
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