What is the reason behind Rollup flagging code-splitting issues even though I am not implementing code-splitting?

In my rollup.config.js file, I have only one output entry defined as follows:

export default {
  input: './src/Index.tsx',
  output: {
    dir: './myBundle/bundle',
    format: 'iife',
    sourcemap: true,
  },
  plugins: [
    typescript(),
    nodeResolve(),
    commonjs(),
    babel(),
    json(),
    terser(),
  ],
};

I'm puzzled as to why Rollup is flagging this as code-splitting:

[!] Error: UMD and IIFE output formats are not supported for code-splitting builds.

Answer №1

While working with Routify, I came across a issue that was resolved by including inlineDynamicImports: true in the rollup.config.js file.

export default {
input: "src/app.js",
output: {
    sourcemap: true,
    format: "iife",
    name: "myApp",
    file: "public/build/mainbundle.js",
    inlineDynamicImports: true, //This line should be added
},

svelte - npm package import error

Answer №2

Ensure that the format is either set to esm or es

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