Sample code to evaluate bitcoin script using Bitcoin SV Library (bsv) https://docs.moneybutton.com/docs/bsv-overview.html

scriptEval.js

let bsv = require('bsv')

const slockStr = "OP_2 OP_EQUAL"
const slock = bsv.Script.fromASM(slockStr)
console.log("\nLocking script loaded\n")

const sunlockStr = "OP_2"
const sunlock = bsv.Script.fromASM(sunlockStr)
console.log("\nUnlocking script loaded\n")

const opcode_cnt = slock.chunks.length + sunlock.chunks.length
console.log(opcode_cnt + " opcodes to process ...")
const si = bsv.Script.Interpreter()

const verified = si.verify(sunlock, slock, null, null, bsv.Script.Interpreter.SCRIPT_VERIFY_P2SH |
    bsv.Script.Interpreter.SCRIPT_ENABLE_MAGNETIC_OPCODES | bsv.Script.Interpreter.SCRIPT_ENABLE_MONOLITH_OPCODES)

if (verified) {
    console.log("\n\x1b[32m%s\x1b[0m", "True")
} else {
    console.log("\n\x1b[31m%s\x1b[0m", "False: " + si.errstr)
}