tslib
Runtime library for TypeScript helpers. (by microsoft)
fluent-streams
Fluent iterables processing for JavaScript and TypeScript (by aleksei-berezkin)
| tslib | fluent-streams | |
|---|---|---|
| 5 | 3 | |
| 1,338 | 9 | |
| 1.1% | - | |
| 7.3 | 5.5 | |
| 10 days ago | about 4 years ago | |
| TypeScript | TypeScript | |
| BSD Zero Clause License | ISC License |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
tslib
Posts with mentions or reviews of tslib.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2025-09-19.
- Less is safer: how Obsidian reduces the risk of supply chain attacks
-
Htmx changes license to Zero-Clause BSD
It's appropriate for software designed for use cases where an attribution requirement would be inconvenient or otherwise undesirable. For example, https://github.com/microsoft/tslib uses it, because that library is automatically included in any TypeScript program that uses downleveling, so if it had an attribution requirement then that requirement would apply to every program written in TypeScript, which nobody wants. (GCC and LLVM do something similar with their special runtime-library exceptions to the GPL and Apache License, respectively, but tslib lives in a separate repository from the rest of TypeScript and so could easily just get a separate license.)
-
String Literals in JavaScript: Should I Use Double-quotes or Single-quotes?
Looking at some popular JavaScript projects on GitHub, I noted that react, moment, and express all use single quotes for strings. However, another popular project, tslib, uses double quotes 🙄. So, while it would seem that single quotes is more common, this metric is not entirely conclusive.
-
https://np.reddit.com/r/learnjavascript/comments/o61djh/es6_what_is_the_difference_between_import_as/h2raxp0/
Things get a little interesting if you're using CommonJS interoperability, in which case our second import becomes something like const view2 = __importDefault(require("./view2")).default. This helper function checks to see if the imported file is an ES module and effectively namespaces the module under the default property if not. You can see TypeScript's implementation of this here.
-
Optimizing bundle size with TSLib helper functions
You may just copy them from tslib. It's 0BSD-licensed which doesn't even require attribution; but having the link somewhere in your comments is at least polite 🙂
fluent-streams
Posts with mentions or reviews of fluent-streams.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-12-12.
-
Fluent Streams: A Library for Rich Iterables Manipulation
I couldn't find one that fits all these needs, so I created my small library — fluent-streams.
-
3 JavaScript features that bloat your ES5 bundle
When I looked into a dist of my project for the first time I got shocked: almost every file had __read or __whatever, and all neat for-ofs were turned into large and ugly structures. However, having applied techniques I described here and there, I reduced the bundle size for about 15%. So can you! 😉
-
Optimizing bundle size with TSLib helper functions
I applied this approach in my Fluent Streams lib, and that's not the only bundle-size-trick I used here. The next post is coming 😄
What are some alternatives?
When comparing tslib and fluent-streams you can also consider the following projects:
XToolSet - Typed import, and export XLSX spreadsheet to JS / TS. Template-based create, render, and export data into excel files.
ramda - :ram: Practical functional Javascript
tsyringe - Lightweight dependency injection container for JavaScript/TypeScript
javascript - JavaScript Style Guide
ts-transform-import-path-rewrite - TS AST transformer to rewrite import path
ts_injector - Simple and lightweight injector for typescript projects.