What are the numbers in the file names in next bundle analyzer?

Question

Just started using next bundle analyzer. I cannot understand what these random numbers are, which are being given to specific pages of the Next app.

For eg: 1883.js. What is 1883?

Answer 1

They're the different sizes for that specific webpack chunk.

From the webpack-bundle-analyzer documentation (used internally by next-bundle-analyzer):

webpack-bundle-analyzer reports three values for sizes. defaultSizes can be used to control which of these is shown by default. The different reported sizes are:

• stat This is the "input" size of your files, before any transformations like minification. It is called "stat size" because it's obtained from Webpack's stats object.

• parsed This is the "output" size of your files. If you're using a Webpack plugin such as Uglify, then this value will reflect the minified size of your code.

• gzip This is the size of running the parsed bundles/modules through gzip compression.