JavaScript Engine
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JavaScript Engine
Starting from version 0.8.6,
multiple JavaScript engines are supported.
To specify a particular engine, use the js_engine directive
available for both the
http
and
stream.
By default, the njs engine is used.
njs engine
The njs engine is deprecated
since 1.0.0;
new code should use the
QuickJS engine instead.
njs is an embeddable JavaScript engine
developed as a part of the njs module.
See the Сompatibility section for details.
QuickJS engine
QuickJS is a lightweight,
embeddable JavaScript engine that supports
the ES2023 specification,
including features as modules, asynchronous generators, proxies and BigInt.
Since version 0.8.6,
a drop-in replacement for
njs/nginx objects
has been introduced
to ensure compatibility with the njs engine, with the following exceptions:
njs-specific API:
njs.dump(),
console.dump().
deprecated API:
require(),
use the import statement instead.
js_preload_object directive for
http
and
stream.
njs built-in modules status:
buffer:
since 0.8.6.
crypto:
since 0.8.10.
fs:
since 0.8.9.
querystring:
since 0.8.10.
WebCrypto:
since 0.8.10.
xml:
since 0.8.10.
zlib:
since 0.8.5.
njs built-in objects status:
process:
since 0.8.8.
TextDecoder:
since 0.8.10.
TextEncoder:
since 0.8.10.
nginx built-in objects status:
ngx.fetch:
since 0.9.1.
shared dictionary:
since 0.8.8.