banner-js-webpack-plugin

append content before webpack entry bundle

inject your JS code before entry of webpack

Install

npm install banner-js-webpack-plugin

Pre

// webpack.config.js
const BannerJSPlugin = require('banner-js-webpack-plugin')

// webpack.config.js
plugins: [
    new BannerJSPlugin(function () {
        // your code
      })
]

also,

// webpack.config.js
plugins: [
    new BannerJSPlugin('function () {}')
]