the jint lib test demo project
use jint implate a simple shell by video: https://docs.microsoft.com/shows/code-conversations/sebastien-ros-on-jint-javascript-interpreter-net
this video tutorial is old , I use Jint 3.1.1 can't run ,so I write a new Version:
the run result:
Welcome to use Jint Shell,Jint Verssion:3.1.1,this is implement by video:
https://docs.microsoft.com/shows/code-conversations/sebastien-ros-on-jint-javascript-interpreter-net
input exit() to exit
[Jint Shell]>let hw=()=>"hello world";hw();
hello world
[Jint Shell]>I find Jint can Import js file,so I want to import the lodash.js,
base the Jint readme file module part,it hard to understand how to use,
so I write this demo test.
we can import lodash.js as global variable(_).
if we import a js file write by us,the variable,method .etc is not can use in global,
not like in browser , will auto mount on window obj,we need handle mount method,variable
to globalThis.
example:js/old/tool.js
const goodNum = 42;
const greet = (name) => `hello,${name},nice to meet you`;
globalThis.goodNum = goodNum;
globalThis.greet = greet;we can use engine.Execute(code) or engine.Evaluate(code) to execute js code.
the esm module is write simple,just write like run in browser
example:js/esm/tool.js
const goodNum = 42;
const greet = (name) => `hello,${name},nice to meet you`;
export { goodNum, greet }but the code not run by engine.Execute(code) or engine.Evaluate(code),
we need run code like this:
// we can write code to main.js directly
var main2 = engine.Modules.Import("./esm/main.js");
// the module should run by Get Or As* Method,use like engine.Execute will error
// the module main only execute once
var moduleMain2 = main2.AsObject();
double returnVal = main2.Get("returnVal").AsNumber();we need to get the module instance,then get the module result ,the code in module will execute.
the test run result:
Test_GlobalVariable---------------
[12:00:01][info] name:tom,age:20,likeNum:42
[12:00:01][info] hello,jerry,nice to meet you
[12:00:01][info] [1,4,9]
[12:00:01][info] lodash version:4.17.15
Test_ESMModule---------------
main1------------
[12:00:01][info] name:tom,age:20,likeNum:42
[12:00:01][info] hello,jerry,nice to meet you
[12:00:01][info] [1,4,9,16]
[12:00:01][info] lodash version:4.17.15
main2------------
[12:00:01][info] name:tom,age:20,likeNum:42
[12:00:01][info] hello,jerry,nice to meet you
[12:00:01][info] [1,4,9,16]
[12:00:01][info] lodash version:4.17.15