Deprecation Warning on Webpack 5

Expected Behaviour

Clean output without deprecation warning.

Actual Behaviour

After webpack update (from v4 to v5) I’m getting deprecation warnings in my console.

(node:7361) [DEP_WEBPACK_DEPRECATION_ARRAY_TO_SET] DeprecationWarning: Compilation.modules was changed from Array to Set (using Array method 'reduce' is deprecated)

(node:41349) [DEP_WEBPACK_MODULE_ERRORS] DeprecationWarning: Module.errors was removed (use getErrors instead)

Steps to Reproduce the Problem

Using tracing:

node --trace-deprecation node_modules/webpack/bin/webpack.js

Output:

(node:41650) [DEP_WEBPACK_DEPRECATION_ARRAY_TO_SET] DeprecationWarning: Compilation.modules was changed from Array to Set (using Array method 'reduce' is deprecated)
    at Set.set.<computed> [as reduce] (/Users/.../myproject/node_modules/webpack/lib/util/deprecation.js:78:4)
    at determineModules (/Users/.../myproject/node_modules/ts-loader/dist/after-compile.js:58:32)

(node:41650) [DEP_WEBPACK_MODULE_ERRORS] DeprecationWarning: Module.errors was removed (use getErrors instead)
    at /Users/.../myproject/node_modules/ts-loader/dist/after-compile.js:140:45
    at Array.forEach (<anonymous>)

Environment

Node.js v12.16.2
webpack@5.0.0-beta.16
ts-loader@7.0.5

Issue Analytics

State:
Created 3 years ago
Reactions:1
Comments:10 (6 by maintainers)

Top GitHub Comments

5reactions

wosscommented, Sep 20, 2020

i’m still getting this for the versions:

"ts-node": "^8.10.2",
"typescript": "^4.0.2",
"webpack": "^5.0.0-beta.32",

the command is clear; node --trace-deprecation ../../node_modules/webpack/bin/webpack.js --mode=development --config webpack.dev.js since this is lerna monorepo and actual webpack is in the root

After reading comments here and other links, i couldn’t figure out what is actual solution. is there anything i can do? are my package versions incompatible

0reactions

johnnyreillycommented, Oct 15, 2020

Some deprecations have been fixed - some still need to be. All help appreciated! Locking this issue - please continue conversation here instead: https://github.com/TypeStrong/ts-loader/issues/1196

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