复制＆＃34;未选中chrome.runtime.lastError＆＃34;警告

Question

我需要复制chrome.runtime.lastError功能。如何在自定义函数中未捕获chrome.runtime.lastError时触发警告？

＆＃13;

＆＃13;

if(self.chrome == null) {
 self.chrome = { runtime: { } }
}

chrome.test = function(option, callback) {
 if(option) {
  callback("done")
 } else {
  chrome.runtime.lastError = { message: "Needs something." }
  callback()
  chrome.runtime.lastError = undefined
} }

chrome.test(false, function(result) {
 console.log(result)
})

＆＃13;

＆＃13;

＆＃13;

Answer 1

我能够使用Proxies并覆盖chrome.runtime来实现此功能。

if(self.chrome == null) {
 self.chrome = { runtime: { } }
}

chrome.test = function(option, callback) {
 if(option) {
  callback("done")
 } else {
  let error = "Needs something."
  let unchecked = true
  chrome.oldruntime = chrome.runtime
  chrome.runtime = new Proxy(chrome.runtime, {
   get(target, key) {
    if(key == "lastError") {
     unchecked = false
     return({ message: error })
    } else {
     return(target[key])
  } } })
  callback()
  chrome.runtime = chrome.oldruntime
  if(unchecked) {
   console.error("Unchecked runtime.lastError while running chrome.test: " + error)
} } }

chrome.test(false, function(result) {
  console.log(result)
})