DevTools failed to parse SourceMap

Question

I am trying to get my Webpack project to have a source map file.

I finally got the settings right so that it would do that, but now I am getting this error:

Answer 1

From experience, I wouldn't expect a client to tell you why it couldn't parse a SourceMap (although that would be nice). I have run into issues with some tools being unable to parse large source maps (probably memory constraints), and given your large asset size, I would look at that first.

Webpack supports several different values for the devtool config field, and some of them are less faithful than the default. Have you tried, for example, 'cheap-module-source-map'? Getting line numbers only (no columns) is a fine trade off for a usable source map IMO.

But it will probably serve you better to reduce the asset size. Webpack's code splitting and 'chunk' management options make it pretty straightforward to split your code into multiple files that are loaded async at runtime. In this case you would have two or more JS files, and each would have its own source map, so the browser will no longer choke trying to process one big file.