Obliterate an object

obliterate.js

// recursively deletes all properties within an `object` or `function`
// TODO option to also handle non-enumerable but configurable descriptors
function obliterate(obj: object) {
  const visited = new WeakSet

  _obliterate(obj)

  async function _obliterate(obj) {
    if (!obj || !(typeof obj === 'object' || typeof obj === 'function')) return

    // stop traversing if we already visited this object higher up
    if (visited.has(obj)) return

    visited.add(obj)

    for (const [key, value] of Object.entries(obj)) {
      try {
        _obliterate(value)
      } catch(e) {
        if (e instanceof RangeError) {
          await new Promise(resolve => setTimeout(resolve))
          _obliterate(value)
        }
      }

      // NOTE unsuccessful deletions (f.e. for non-configurable properties) throw
      // in strict mode
      try { delete obj[key] } catch(e) {}
    }

    if (Array.isArray(obj))
      try { obj.length = 0 } catch(e) {} // some length props are readonly
  }
}