Add support for modifying instance methods from PouchDB.prototype

index.js

@@ -26,12 +26,12 @@ function installWrappers (base, handlers = {}) {
  } else {
  base._handlers[method] = [handler]
  // create the new wrapped method
- base[method] = replacementMethod(base, method)
+ base[method] = replacementMethod(method)
  }
  }
 }
 
-function replacementMethod (base, method) {
+function replacementMethod (method) {
  return function (...args) {
  function doMethod () {
  // remove callback from args list if present
@@ -41,26 +41,26 @@ function replacementMethod (base, method) {
  callback = args.pop()
  }
  // compose handlers on top of the base method
- let prev = base._originals[method].bind(base)
- for (const handler of base._handlers[method]) {
- prev = handler.bind(base, prev)
+ let prev = base._originals[method].bind(this)
+ for (const handler of this._handlers[method]) {
+ prev = handler.bind(this, prev)
  }
  // execute wrapped method, nodify result w/ callback
  const result = prev(...args)
  if (result.then && callback) { nodify(result, callback) }
  return result
  }
  // await pouchdb task queue before calling the method
- if (method !== 'changes' && base.taskqueue && !base.taskqueue.isReady) {
+ if (method !== 'changes' && this.taskqueue && !this.taskqueue.isReady) {
  const dbReady = new Promise((resolve, reject) => {
- base.taskqueue.addTask((error) => {
+ this.taskqueue.addTask((error) => {
  // istanbul ignore next
  if (error) { reject(error) } else { resolve() }
  })
  })
- return dbReady.then(doMethod)
+ return dbReady.then(doMethod.bind(this))
  } else {
- return doMethod()
+ return doMethod.call(this)
  }
  }
 }