Best alternatives to myjs in 2026

Sometimes you need to run a bit of JavaScript from inside a Python script — scrape a page that only renders via JS, execute a snippet from an API, or bridge two ecosystems — without pulling in a full Node.js install or a heavyweight browser automation stack. myjs is a JavaScript interpreter written entirely in Python that does exactly that: it parses and runs real JS code, including a fair chunk of modern syntax, directly inside your Python process. It's a tree-walking JS evaluator with roughly 190 DOM constructors for headless HTML rendering, support for ES module syntax, async/await, generators, classes and destructuring, plus a built-in Promise/event-loop implementation (setTimeout, requestAnimationFrame). A two-way bridge lets JS code call back into Python (py.import()) and access host bindings like fs, path, http and fetch. It's early-stage (v0.0.3, alpha) and doesn't yet support Proxy, the with statement, or full ES5 getter/setter semantics.