ブログ記事100件
状況ReactでTypeScriptを使ってKotlinのSpringServerに通信するためにFormdata()の形を利用しました。その時通信をしようと思ったらエラーが出てました。415UnsupportedError前にこういうエラーが出たときはサヴァの中で変換してデ-タを入れたんですけど今回はそれができませんでしただとしてこれがフロントの問題かじゃないとバックの問題かが一番わかりずらかったんです。Resolved[org.springframework.w
Facebook'sofficialReactstatemanagementlibraryRecoilcouldreplaceReduxReduxiswell-knownforstatemanagementinReact,andasamasspanderer,IamusingReduxasusual.However,thereareafewareaswhereI…
HowtouseConcurrentModeofReactwithTypeScriptThisisanoteonhowtotryReact'sConcurrentModeinTypeScript,whichisnotyetofficiallyreleasedatthistime.Sincetype-relateder…
MemoonhowtouseSQLitewithJavaScriptThisisamemoonhowtouseSQLitewithJavaScript.Wedidnotelaboratetoomuch,butfocusedontheminimumnecessaryfunctions.Iwilln…
ThoughtsonswitchingfromJavaScripttotheGolanguageProgramswritteninJavaScript(TypeScript)wererewrittenintheGolanguage.Iwillwriteaboutthemotivationandtheresultsoftherewr…
HowtoexecuteJavaScriptconcurrentlywhilespecifyingthenumberofconcurrentexecutionsTherearetimeswhenyouhavemanytasksthatyouwanttoprocessinparallel,butexecutingalloftheminparallelwouldbetooheavy,so…
Docker'spuppeteersuddenlystoppedworking.IusuallyusepuppeteerforwebcrawlingandIuseDockertorunpuppeteer.IhadtoaddacrawlitemandwhenImodifiedtheprogramandbu…
MemoonhowtousestreaminNode.jsWhenprocessingdata,wetendtobelazyandreadallthedataintomemorybeforeprocessingit.Thisisnotaproblemwhenthedatasizeis…
HowtogetasubdirectorylistingofGoogleCloudStoragewithNode.jsWepreviouslyusedtheGCPPyhtonlibrarytogetalistofGoogleCloudStoragesubdirectories,andthisistheNode.jsversionofthat.Pyt…
HowtoreadCSVfileswithnewlinesandcommasoutputbyExcelinJavaScriptCSVfileshavebeenloadedusingSheetJS.However,therewasaCSVfilethatIjustcouldn'tgettoreadproperlybecauseofgarbledcharact…
CollectingdatawithTwitterAPIItriedtogetdatafromTwitterusingtheTwitterAPItoseeifIcoulduseittolearnabouttrendsintheworld.Asitturnsout,Ihadh…
MemoonhowtouseMoment.js,aJavaScriptdatecalculationlibraryWhenperformingdateoperationsinJavaScript,thebuilt-inDatefunctionisdifficulttohandle,sosomekindoflibraryisgenerallyused.…
MemoonhowtoreadExcelfilesinJavaScriptusingSheetJS(xlsx)IuseSheetJS(xlsx)toloadExcelfilesinJavaScript(TypeScript).TheusageisabitpeculiarandIforgethowtouseiteasily,sothis…
HowtouseMicrosoftSQLServerwithJavaScriptThisisamemoonhowtouseMicrosoftSQLServer(MSSQL)withJavaScript.Thelibraryistedious,whichisalsorecommendedbyMicrosoft.t…
MemoonhowtousetheMarkdownparserremarkIhavereadMarkdown,editeditinvariouswaysasIwanted,andwantedtooutputittoMarkdownagain.IusedaJavaScriptMarkdownparser…
IwanttohandleJavaScriptarraysinSQL.IusuallyuseSQL,butwhenIamworkingwitharraydatainJavaScript,IsometimeswishIcouldwritequeriesinSQLforJavaScriptarrays.…
NotesonhowtousePlaywrightSinceIhavebeenexperimentingwithPlaywrightrecently,IthoughtIwouldmakeanoteofhowtousePlaywrightsothatIcanrememberhow…
IwaswrongaboutJavaScriptPromisebeinganasynchronousfunction.IlearnedfromthefollowingarticlethatPromiseinJavaScriptiscalledsynchronously.https://zenn.dev/yuhua_shi/articles/331569ef2fe886…
ThoughtsonusingbothSeleniumandPlaywrightIusePuppeteerforwebcrawling.IhadhopedtosomedayputtogetheraguideonhowtousePuppeteer,butinthemeantime,Ihavebeenhear…
CreateasitelooselywithChakraUIWhencreatingasamplesiteusingReact,youmaywanttocreateitquicklyandeasilybycombiningexistingsettingswithoutthinkingtoomu…
MemoonhowtocreateaminimalauthenticationsitewithAWSAmplify+ReactIwantedtocreateaReactsitewithanauthenticationfunctioneasily,butIgaveupbecauseitwastoomuchtroubletobuildabackendeac…
HowtowriteAWSAmplifyLambdaFunctioninTypeScriptWhenyouaddaLambdaFunctioninAWSAmplify,atemplateisgeneratedinJavaScript,sothisisamemoonhowtoturnitintoTypeScript.T…
ChangetheTypeScriptversionofVSCodeWhenIcreateaTypeScriptReactappwithcreate-react-appapp-name--templatetypescriptandtrytoedititinVSCode,Igetthefollowing…
I'mstartingtothinkthatusingCloudFormationfromAWSCDKistherightwaytogo.IpreviouslytriedtohandwriteanAWSCloudFormationtemplateandfailed....www.ekwbtblog.comWhatIlearnedatthattimewasthatCloudFo…
HowtodecryptdataencryptedwithPHP'smcryptusingNode.jsIgotintotroublewhenItriedtodecryptdataencryptedwithPHP'smcryptusingNode.js,sohereisanoteonthecauseandsolution.situ…
AESencryptionanddecryptioninNode.jsIhadachancetodoAESencryption/decryptioninNode.js,soherearemynotes.Theencryptionalgorithm"AES-256-CBC"wasused.AboutAES…
HowtooutputdatafromaTabletagtableinPuppeteercrawlingtoCSVWeusePuppeteerasacrawler.SometimesyouarecrawlingandwanttoretrievedatafromatablecreatedbyaTabletagonyoursite.WithP…
Passport.jsUsageNotesIhadachancetousePassport.js,sohereismypersonalmemoonhowtousePassport.jsincaseIneeditagain.WhatisPassport.js?Passp…
BuildingaNode.jsenvironmentinWSLwithnvmAswithBuildingaPythonenvironment,thisisanotefromwhenIre-installedtheNode.jsenvironmentonanewversionofWSL'sUbuntu.Sin…
WhatIgotintoormisunderstoodwhenlearningNode.jsforthefirsttimeIuseNode.js,butmyimpressionofNode.jswasquitedifferentbeforeandafterlearningNode.js,soIhavecompiledabriefexplanationof…