Symbol with id "filter" already exists. It happens when you require SVGs with the same file name from different folders.

[kush1960]

Hi after much trial and error I've managed to get extract-svg-sprite-webpack-plugin to successfully build a spritesheet from a folder of SVGs and transpile my SCSS path to the correct symbol reference.

However I get this annoying warning every-time the build task runs: WARNING in ./src/svg/filter.svg Module Warning (from ./node_modules/extract-svg-sprite-webpack-plugin/lib/loader.js): Symbol with id "filter" already exists. It happens when you require SVGs with the same file name from different folders. Set "symbolId" option to more specific, e.g. "[path]-[name]-[hash]" @ ./src/sass/style.scss (./node_modules/css-loader/dist/cjs.js!./node_modules/extract-svg-sprite-webpack-plugin/lib/css-loader.js!./node_modules/sass-loader/dist/cjs.js!./src/sass/style.scss) 7:36-64

In my use case, this warning doesn't make sense since there is only one reference to the SVG, but I wonder if I have my config wrong and it's somehow running twice?

FYI I'm using Webpack with Wordpress, so I'm only interested in building a sprite sheet from a folder of icons and fixing my CSS references to the icon id... As I said, that's all working. It's just I get this annoying error!

Here's my webpack.config.js:

const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const BrowserSyncPlugin = require('browser-sync-webpack-plugin');
const StyleLintPlugin = require('stylelint-webpack-plugin');
const SpritePlugin = require('extract-svg-sprite-webpack-plugin');

module.exports = {
  context: __dirname,
  entry: {
    frontend: ['./src/index.js', './src/sass/style.scss'],
    //customizer: './src/customizer.js'
  },
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: '[name]-bundle.js'
  },
  mode: 'development',
  devtool: 'cheap-eval-source-map',
  module: {
    rules: [
      {
        enforce: 'pre',
        exclude: /node_modules/,
        test: /\.jsx$/,
        loader: 'eslint-loader'
      },
      {
        test: /\.jsx?$/,
        loader: 'babel-loader'
            },
            {
                test: /\.svg$/,
                loader: SpritePlugin.loader,
            },          
      {
        test: /\.s?css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', SpritePlugin.cssLoader, 'sass-loader']
            },
            {
        test: /\.(jpe?g|png|gif|svg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        loader: 'image-webpack-loader',
        enforce: 'pre'
            },   
      {
            test: /\.(jpe?g|png|gif)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              outputPath: 'img/',
              name: '[name].[ext]'
            }
          },
          'img-loader'
        ]
      },
      {
        test: /\.(woff(2)?|ttf|eot)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              outputPath: 'fonts/',
              name: '[name].[ext]'
            }
          }
        ]
      }
    ]
  },
    plugins: [
        new SpritePlugin(
            {
                //symbolId: 'icon-[path]-[name]-[hash]'
                //plainSprite: true
            }
    ),
    new StyleLintPlugin(),
    new MiniCssExtractPlugin({
    filename: '[name].css'
    }),
  new BrowserSyncPlugin({
        files: '**/*.php',
        proxy: 'https://base.six',
        open: false
    })
  ],
  optimization: {
    minimizer: [new UglifyJsPlugin(), new OptimizeCssAssetsPlugin()]
  },
  performance: {
    maxEntrypointSize: 512000,
    maxAssetSize: 512000
  }
};

If anyone can help me, I'll gladly send buy you a coffee/beer!

Thank you, I'm at the end of my knowledge with this :(

[kush1960]

Looking into this further, it appears that SpritePlugin.loader is generating the sprite sheet twice. If I remove one of the entry points below:

entry: {
        frontend: ['./src/sass/style.scss', './src/index.js'],
}

It works without errors.

[kush1960]

Ignore me, I just noticed I had this in my index.js file require.context('./svg', true, /\.svg$/);