The main documentation is in doc/quickjs.pdf or doc/quickjs.html.
platformio.ini
lib_deps =
...
https://github.com/binzume/esp32quickjs.gitmain.cpp
#include <Arduino.h>
#include "esp/QuickJS.h"
static const char *jscode = R"CODE(
console.log('Hello, JavaScript!');
)CODE";
M5QuickJS qjs;
void setup() {
Serial.begin(115200);
qjs.begin();
qjs.exec(jscode);
}