quickjs | Java bindings for quickjs JavaScript engine
kandi X-RAY | quickjs Summary
kandi X-RAY | quickjs Summary
Java binding for quickjs 2020-07-05, a very compact embedded ECMAScript (JavaScript) engine. Important Note: This project copied from: quack. Original project supports only Android but this version supports regular JVM.
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QUESTION
I am interested in using QuickJS to modify preferences in a C++ app. So, there is a preference variable called
int myPref = 0
I want to expose this as a JS variable called
jsPref
Then the user can modify this directly via JS using
jsPref = 1
This can be extended to a struct - where one can define
struct myPref { int a, int b};
which is exposed as a global in JS as jsPref
Inside the JS script, I wish to call
...ANSWER
Answered 2021-Nov-30 at 14:37Take a look at e.g. JS_AddIntrinsicAtomics
in the QuickJS source code. It uses JS_SetPropertyFunctionList
to create an object whose properties are defined by a simple array of structures, with the help of some convenience macros.
Instead of JS_CFUNC_MAGIC_DEF
, you can use JS_CGETSET_DEF
or JS_CGETSET_MAGIC_DEF
to define custom properties with getters and setters. Since the contents of the JSContext
structure are not exposed in the public API, you will have to use JS_GetGlobalObject
to access the global object. Otherwise though, what you need to do is substantially the same.
This should look something like this:
QUESTION
I am trying to compile QuickJS, which is normally developed under linux and gcc has no problem with such code. However, I have troubles to compile this on Visual Studio 2019:
...ANSWER
Answered 2021-Jul-13 at 10:47__m128
is defined as a union thus:
QUESTION
I've encountered what seems like a bug in the QuickJS JavaScript engine. I've submitted a GitHub issue, but am also asking here to see if it might be user error, and/or to find out if others have encountered similar issues.
The following test code:
...ANSWER
Answered 2021-May-29 at 19:41For anyone who might stumble on this in the future, this was due to incorrect API usage. The leak wasn't due to the JavaScript code itself, but rather because JS_Eval()
returns a JSValue
, which needs to be freed using JS_FreeValue()
.
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