Package Exports
- jintr
- jintr/dist/index.js
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (jintr) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
Jinter
A tiny JavaScript interpreter written in TypeScript
Note: This project was originally developed for use in YouTube.js.
Usage
Execute some JavaScript code:
// const Jinter = require('jintr').default;
import Jinter from 'jintr';
const code = `
function sayHiTo(person) {
console.log('Hi ' + person + '!');
}
sayHiTo('mom');
`
const jinter = new Jinter(code);
jinter.interpret();Inject your own functions and variables into the interpreter:
// ...
jinter.visitor.on('println', (node, visitor) => {
if (node.type === 'CallExpression' && node.callee.type === 'MemberExpression') {
const args = node.arguments.map((arg) => visitor.visitNode(arg));
return console.log(...args);
}
});
// Ex: str.toArray();
jinter.visitor.on('toArray', (node, visitor) => {
if (node.type === 'CallExpression' && node.callee.type === 'MemberExpression') {
const obj = visitor.visitNode(node.callee.object);
return obj.split('');
}
});
// Or you can just intercept access to specific nodes;
jinter.visitor.on('myFn', (node, visitor) => {
console.info('MyFn node just got accessed:', node);
return 'proceed'; // tells the interpreter to continue execution
});
jinter.interpret();For more examples see /test and /examples.
License
Distributed under the MIT License.