webpack only one instance of babel-polyfill is allowe
今天在接手了之前的專案，但是在起專案的時候報了以下錯誤
然後就看了下他的配置檔案，這個專案是用vue-cli2搭建的，主要引起錯誤的原因如下圖所示：
用了這種方式後，babel-polyfill與其他的外掛造成了衝突，也就是說有兩個地方都用到了babel-polyfill
於是我的解決方案如下所示:
第一步去掉配置檔案的babel-polyfill
entry: {
app: './src/main.js',
}第二步，在main.js加上以下程式碼
if (!global._babelPolyfill) { require('babel-polyfill'); }
這就樣就完美的解決了這個問題，希望對大家有用~
相關推薦
webpack only one instance of babel-polyfill is allowe
技術標籤：Webpackwebpack 今天在接手了之前的專案，但是在起專案的時候報了以下錯誤
hive多條元資料 The query returned more than one instance BUT either unique is set to true or only aggregates are to be returned, so should have returned one result maximum
kylin構建報錯，日誌如下： java.lang.RuntimeException: cannot get HiveTableMeta at org.apache.kylin.source.hive.HiveTable.<init>(HiveTable.java:50)
findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of DomWrapper which is inside StrictMode.
1. 警告資訊 Warning: findDOMNode is deprecated in StrictMode. findDOMNode was passed an instance of DomWrapper which is inside StrictMode. Instead, add a ref directly to the element you want to refe
error: one of the uplinks is down, refuse to publish
技術標籤：程式設計師成長-錯題集npm 問題場景 verdaccio搭建本地npm私庫後，上傳包到私庫報錯： http <-- 503, user: xx, req: ‘PUT /helloworld’, error: one of the uplinks is down, refuse to publish
Could not autowire. There is more than one bean of ‘RedisTemplate‘ type原因
技術標籤：javajavaspring 程式碼如下： @RunWith(SpringRunner.class) @SpringBootTest class RedisdemoApplicationTests {
Jackson：Cannot construct instance of **** (although at least one Creator exists):
技術標籤：jsonjava Jackson：nested exception is java.lang.IllegalArgumentException: Cannot construct instance of **** (although at least one Creator exists):
Pymongo: TypeError: if no direction is specified, key_or_list must be an instance of list
使用pymongo對某一欄位進行sort時，報錯 TypeError: if no direction is specified, key_or_list must be an instance of list
CORS errors: The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed.
背景 今天在除錯專案的時候，碰到了一個跟跨域相關的問題——CORS errors。 場景如下：前端向第三方平臺發起一個請求，使用了 Nginx 做代理轉發去處理跨域問題。
解決大於5.7版本mysql的分組報錯Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated
原因: MySQL 5.7.5和up實現了對功能依賴的檢測。如果啟用了only_full_group_by SQL模式(在預設情況下是這樣)，那麼MySQL就會拒絕選擇列表、條件或順序列表引用的查詢，這些查詢將引用組中未命名的非聚合列，而不
MySQL： 1055 Expression #3 of SELECT list is not in GROUP BY clause and contains nonaggregated column
group by有一個原則，就是select後面所有的列中，沒有使用聚合函式的列，必須出現在group by子句中。
java.lang.UnsupportedOperationException: Unable to create instance of org.fisco.bcos.web3j.abi.datatypes.generated.Int256
Contract Address : 0x967f92adc229b77dda64b42af21ea1ff1b0702eb Unable to create instance of org.fisco.bcos.web3j.abi.datatypes.generated.Int256
R語言ggsurvplot繪製生存曲線報錯 : object of type ‘symbol‘ is not subsettable
原文連結：http://tecdat.cn/?p=14683 預期 繪製生存曲線圖 實際 object of type ‘symbol‘ is not subsettable
java.lang.IllegalStateException: No fallbackFactory instance of type class
1，微服務之間是通過Fegin進行呼叫，建立了一個呼叫介面，當開啟熔斷機制之後，會造成無法啟動和編譯
java.sql.SQLException: Parameter index out of range (3 ＞ number of parameters, which is 2)的解決方法
轉載請標明出處：https://blog.csdn.net/men_ma/article/details/106847165. 本文出自 不怕報錯 就怕不報錯的小猿猿 的部落格
Caused by: java.sql.SQLSyntaxErrorException: Expression #16 of SELECT list is not in GROUP BY clause
現象是這樣的，前端訪問應用稽核功能，系統出現數據庫錯誤，前端的message將錯誤資訊也展示出來了。
babel polyfill 的一些理解
前言 為了支援業務中少量的es6+的高階特性，最近在研究了一下babel的墊片，現將此整理為文字，如下。
急！報錯:NullReferenceException: Object reference not set to an instance of an object
技術標籤：解決問題unityc# 急！報錯:NullReferenceException: Object reference not set to an instance of an object
ValueError: only one element tensors can be converted to Python scalars
問題原因： a,b=torch.tensor([1,2,3]),torch.tensor([1,2,3]) lis.append(a) lis.append(b) torch.tensor(lis)
Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column
技術標籤：資料庫 執行報錯： Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column ‘test.dept_emp.emp_no’ which is not functionally dependent on columns in GROU
ERROR in TypeError: The ‘compilation‘ argument must be an instance of Compilation
技術標籤：npmtypescript 我是webpack5.6.0，老版本html-webpack-plugin不行了，解除安裝舊版本