yzhanjsinterpreter
v1.0.2
Published
A JavaScript Interpreter Using JS itself. JavaScript 解释器,包含词法分析、语法解析和执行
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yzhanJSInterpreter
A JavaScript Interpreter Using JS itself, implement eval
JavaScript 解释器,包含词法分析、语法解析和执行。实现 eval
Demo
You could change JavaScript Code and view the result in realtime.
Online Demo
Setup
Node.js
npm i yzhanjsinterpreter
import yzhanJSInterpreter from 'yzhanjsinterpreter'
Browser
<script src="https://cdn.jsdelivr.net/npm/yzhanjsinterpreter@latest/docs/yzhanjsinterpreter.min.js"></script>
Usage
Declaration Code
const code = `let a = 1;
let b = 1;
a <<= b++;
for (let i = 0; i < 10; i++) {
if (i % 2 === 0) continue;
if ((i | 2) == '11') break;
a++;
}
undefined && 1 ?? (0 || a + b);`
Eval · Evaluate
eval
is a reserved keyword, so use evaluate
instead
const evalResult = yzhanJSInterpreter.evaluate(code)
evaluate
runs followed 3 steps:
1. Lexical Analyzer
const lexResult = yzhanJSInterpreter.lex(code)
2. Syntax Parser
const parseResults = yzhanJSInterpreter.parse(lexResult)
3. Executor
const executeResult = yzhanJSInterpreter.execute(parseResults[0])
const evalResult = executeResult
Development
Unit Testing
npm test
Build
npm run build
Preview
npm run dev
Todo
- Travese AST, using child to replace the parent when there is only one parent Node.
- Treeshaking: earse unseded declarations.