From 2fafc801db268fbd79cab2bd607d03f89998329c Mon Sep 17 00:00:00 2001 From: Julian Dehm Date: Wed, 20 Mar 2024 17:45:39 +0100 Subject: [PATCH] docs: add a common_errors file to hopefully help avoid debugging the same problems over and over again --- docs/common_errors.md | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 docs/common_errors.md diff --git a/docs/common_errors.md b/docs/common_errors.md new file mode 100644 index 000000000..b510943ac --- /dev/null +++ b/docs/common_errors.md @@ -0,0 +1,20 @@ +# Common Errors + +## Javascript + +### Error when writing tests for components in a project importing adhocracy4 + +When writing tests with Jest (and/or testing-libray) in a project which uses adhocracy4 and the component being +tested imports a newly developed component from adhocracy4 you might encounter the following +issue: + +``` +Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. +``` + +One possible cause is that you used `npm link` to link to your local a4. +If you get the above error try deleting your `node_modules` +folder (e.g. by running `make clean`) and then properly install a4 via `npm +install liqd/adhocracy4#` (assuming you already +pushed your changes in a4, otherwise create a branch). +It doesn't seem to be enough to install it from a local folder via `npm install ` for some reason.