block4.ts

const target: Record<any, any> = {}

const p = new Proxy(target, {
  set(setTarget, key: string | number, value) {
    console.log(`=== start p.${key} = ${value} ===`)

    console.log(`setTarget === target -> ${setTarget === target}`)
    console.log({ key, value })

    setTarget[key] = value
    console.log(`=== end p.${key} = ${value} ===`)
    return true
  },

  get(setTarget, key: string | number) {
    console.log(`=== start getting p.${key}} ===`)

    console.log(`getting setTarget[${key}]: ${setTarget[key]}`)

    console.log(`=== end getting p.${key}} ===`)
    return 'nope'
  }
})

p.x = 3 // will trigger set trap
console.log()

target.x = 5 // will not trigger trap

console.log(`p.x: ${p.x}`) // will trigger get trap
console.log()

console.log(`p.y: ${p.y}`) // will trigger get trap
console.log()

console.log(target)