javascript - Why does Webpack build of React web app fail when project is built in a different folder? -


i have react project built using webpack. weird issue when run react app in original folder builds , runs without error. when copy files in folder, paste in new folder , try build same project fails. have tried changing folder name, changing config files reflect new folder name, fails in app.js , points error in render method. few points note:

  • i havent hardcoded paths
  • i have cleaned node modules , rebuilt project groundup including cleaning npm cache.
  • the same project works in original folder without errors.

the error follows:

       version: webpack 2.2.1        time: 1520ms        asset       size  chunks             chunk names        app.js     219 kb       0  [emitted]  main        index.html  636 bytes          [emitted]          chunk    {0} app.js (main) 208 kb [entry] [rendered]        [1] (webpack)/buildin/global.js 509 bytes {0} [built]        [32] ./src/app.js 783 bytes {0} [built] [failed] [1 error]        [33] (webpack)-dev-server/client?http://0.0.0.0:8080 4.16 kb {0}         [built]        [34] ./~/ansi-regex/index.js 135 bytes {0} [built]        [35] ./~/punycode/punycode.js 14.7 kb {0} [built]        [36] ./~/querystring-es3/decode.js 2.51 kb {0} [built]        [38] ./~/querystring-es3/index.js 127 bytes {0} [built]        [40] ./~/sockjs-client/lib/entry.js 244 bytes {0} [built]        [47] ./~/sockjs-client/lib/main.js 11.9 kb {0} [built]        [49] ./~/sockjs-client/lib/transport-list.js 613 bytes {0}         [built]        [66] ./~/strip-ansi/index.js 161 bytes {0} [built]        [68] ./~/url/url.js 23.3 kb {0} [built]        [69] ./~/url/util.js 314 bytes {0} [built]        [70] (webpack)-dev-server/client/socket.js 897 bytes {0} [built]        [72] multi (webpack)-dev-server/client?http://0.0.0.0:8080         ./src/app.js         40 bytes {0} [built]        + 58 hidden modules         error in ./src/app.js        module build failed: syntaxerror: unexpected token (39:2)         37 | // });         38 | reactdom.render(        > 39 |   <div>hello</div>,        |   ^        40 |   document.getelementbyid('content'),        41 | );        42 |          @ multi (webpack)-dev-server/client?http://0.0.0.0:8080         ./src/app.js        child html-webpack-plugin "index.html":        chunk    {0} index.html 542 kb [entry] [rendered]        [0] ./~/lodash/lodash.js 540 kb {0} [built]        [1] (webpack)/buildin/global.js 509 bytes {0} [built]        [2] (webpack)/buildin/module.js 517 bytes {0} [built]        [3] ./~/html-webpack-plugin/lib/loader.js!./src/index.html 1.32         kb         {0} [built]        webpack: failed compile.

the above error doesn't happen when running in original folder. issue here?

your .babelrc file in root of project directory, , thats webpack looks use loaders , presets. can workaround using following config

    {       use: [         {           loader: 'babel-loader',           options: {             babelrc: false,             presets: [require.resolve('babel-preset-react-app')], // <- whatever preset wish             cachedirectory: true,           }         }       ],       test: /\.js$/,       exclude: /node_modules/     },

Comments

Post a Comment

Popular posts from this blog

angular - Ionic slides - dynamically add slides before and after -

hi i'm using ngfor create set of 3 slides while starting in middle i'm guaranteed able slide left or right on start. when slide right can simple listen reachedend , push slide array i'm looping. but have problem adding slide beginning. if same above , use e.g. array.unshift() or spread add item beginning, view think it's on position 0 , snaps view new slide. the code below work animates slide change index 1. slide = [0,1,2] //example loop slidechanged(event) { if(this.slides.isbeginning()){ this.slide = [this.slide[0]-1, ...this.slide]; this.slides.update(); this.slides.slideto(1) } } <ion-slides [initialslide]="1" (ionslidedidchange)="slidechanged($event)"> <ion-slide *ngfor="let item of slide"> <h1>slide {{item}}</h1> </ion-slide> </ion-slides> any appreciated! you can using ionslidenextend , ionslideprevend events slides . please...
Read more

Add a dynamic header in angular 2 http provider -

i have http interceptor built via tutorial https://scotch.io/@kashyapmukkamala/using-http-interceptor-with-angular2 the problem need have dynamic header changes automatically once changes 'mode' in app. service able tell interceptor change header, or have interceptor pull header (which string)from service each request. able throwing away patch method, call http.patch('new header string') set header string. call in service controls 'mode' setting. wondering if there way interceptor pull recent value service each request or if can add method http provider via interceptor? i've tried call service in interceptor each request returns undefined. because creating new instance of service or copying value before service fired , loaded/changed data. i don't want pass header string every http provider call because defeats purpose of having interceptor, id able set once changes or have provider fetch service before makes request. tl;dr : need add autom...
Read more

minify - Minimizing css files -

i want know how css files can minimized. currently, using external sites css minifier compress css files. however, after removing whitespaces, comments, etc, file sizes reduced 10-15%. how frameworks bootstrap manage make minimized versions kilobytes. as example, css is: body { background-color: #ff0; } the reduction goes 28 bytes 22 bytes other css files have lot more characters still smaller this. actually minifying code means it's remove thing code white space characters new line characters comments block delimiters it reduces amount of code has transferred on web , speed site load fastly.but unreadable format.
Read more