Preload Modules in Engine Pool¶
Is it Possible to Preload Node.js Modules in V8 Mode in Javet Engine Pool?¶
This is a common question asked by many Javet users. The answer is YES.
How to Do That?¶
Find minified version of the Node.js module we want to load. Usually after running
npm install, we may find that minified version somewhere undernode_modules.Write a new module resolver that can load the minified Node.js module. Be careful with the module type, it may be CMD or ESM.
Create a new engine pool by subclassing the built-in engine pool.
Create a new engine by subclassing the built-in engine.
The new engine pool shall return the new engine.
The new engine shall have the new module resolver set to
V8Runtime.We are all set.
The complete example can be found at JavetExamples/PreloadNodeJSModulesInJavetEnginePool. Clone and run that project.
Note
How about native Node.js module? Yes, that is possible but quite hard in practice. Please contact the maintainer if you really want to do that.