TypeError: Cannot read property 'hash' of undefined

[mthines]

Hey!
Awesome project!

I've been trying to setup the prerender, but i keep getting the following error:

/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/react-scripts/node_modules/webpack/lib/Compilation.js:2285
                        hash.update(child.hash);
                                          ^
TypeError: Cannot read property 'hash' of undefined

Show full error message

/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/react-scripts/node_modules/webpack/lib/Compilation.js:2285
                        hash.update(child.hash);
                                          ^

TypeError: Cannot read property 'hash' of undefined
    at Compilation.createHash (/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/react-scripts/node_modules/webpack/lib/Compilation.js:2285:22)
    at hooks.optimizeTree.callAsync.err (/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/react-scripts/node_modules/webpack/lib/Compilation.js:1288:9)
    at AsyncSeriesHook.eval [as callAsync] (eval at create (/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:6:1)
    at AsyncSeriesHook.lazyCompileHook (/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/tapable/lib/Hook.js:154:20)
    at Compilation.seal (/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/react-scripts/node_modules/webpack/lib/Compilation.js:1244:27)
    at hooks.make.callAsync.err (/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/react-scripts/node_modules/webpack/lib/Compiler.js:624:17)
    at _err0 (eval at create (/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/tapable/lib/HookCodeFactory.js:33:10), <anonymous>:11:1)
    at _addModuleChain (/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/react-scripts/node_modules/webpack/lib/Compilation.js:1095:12)
    at processModuleDependencies.err (/Users/madsthines/Workspace/Adapt/react_boilerplate/node_modules/react-scripts/node_modules/webpack/lib/Compilation.js:1007:9)
    at process._tickCallback (internal/process/next_tick.js:61:11)

My setup

I'm using CRA 3, Typescript and the Html Webpack Plugin.
I've installed the module with Yarn, and double checked it's in the package.json and in the actually node_modules folder.

// Use the correct index.html template.
new HtmlWebpackPlugin({
  inject: false,
  template: `!!prerender-loader?string&entry=./src/index.tsx!${paths.appHtml}`,
  favicon: `${paths.appPublic}/favicons/favicon.ico`,
  manifest: `/manifest.json`,
}),

I thought I might had the same issue as issue 25, but adding the entry, didn't help me.

Any thoughts on why I get this issue?

[vitaliyhayda]

same issue

[vitaliyhayda]

After correctly specifying entry, I was able to get another error:

ERROR in   Error: Child compilation failed:
      Module build failed (from ./node_modules/prerender-loader/dist/prerender-loader.js):
      NonErrorEmittedError: (Emitted value instead of an instance of Error) TypeError: window.URL.createObjectURL is not a function

[shuwenjunn]

Have you fixed it

[PLQin]

see mzgoddard/hard-source-webpack-plugin#416

It might solve your problem

[Hypnosphi]

@PLQin I tried rm -rf node_modules/.cache as suggested there, but it doesn't fix the problem

@vitaliyhayda how exactly did you fix your entry?