node12.16.0 Operation error

[ShareQiu1994]

I'm using nodejs 12.16.0 and cesium 1.66

In node 12.16.0, I found that cesium couldn't run：

Error [ERR_REQUIRE_ESM]: Must use import to load ES Module: D:\github\CesiumJS\server.js
�[90m    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1173:13)�[39m
�[90m    at Module.load (internal/modules/cjs/loader.js:1001:32)�[39m
�[90m    at Function.Module._load (internal/modules/cjs/loader.js:900:14)�[39m
�[90m    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)�[39m
�[90m    at internal/main/run_main_module.js:18:47�[39m {
  code: �[32m'ERR_REQUIRE_ESM'�[39m
}

When I switch to node 10.17.0, cesium 1.66 can run

[ShareQiu1994]

Does cesium plan to support the new version of nodejs？

[mramato]

@ShareQiu1994 thanks for opening an issue.

Cesium already supports Node 12 and I am unable to reproduce this problem with 12.6.0. Can you please provide the exact steps to recreate it?

It appears Node 12.6.0 has 6 significant regressions that they quickly patched in 12.6.1: https://github.com/nodejs/node/blob/master/doc/changelogs/CHANGELOG_V12.md#2020-02-18-version-12161-erbium-lts-mylesborins Perhaps you are hitting one of these?

[ShareQiu1994]

@mramato Thank you for your answer.

repro steps:
1.git clone https://github.com/CesiumGS/cesium.git
2.npm install
3.node server.js

My environment：
Nodejs 12.16.1
Cesium 1.66
Windows 10

When I upgraded the node to 12.16.1, I found that the problem still existed.
I don't know if it's a problem with my system environment. I'll try changing the machine.Thank

[mramato]

@ShareQiu1994 My apologize but I can now reproduce this. I accidentally ran with 12.6 instead of 12.16. This is a breaking change during the 12.x line from the NodeJS team. Looks like they changed behavior as of 12.10.

I'm looking into it.

[mramato]

There are 3 issues here:

1. Cesium's dev server is currently broken under Node 12. (Fixed in Make Cesium release server work on Node 12. #8648)
2. Using Cesium as node modules is broken in Node 12 & 13.
3. Cesium's build system is broken in Node 12 & 13.

1 is a showstopper for 1.67, 2 is a showstopper for 1.68, and 3 is stuck waiting on other third party dependencies to update to Node 12.

[mramato]

Updated my above comment but I'm closing this issue in favor of tracking it as part of #8452

[ShareQiu1994]

@mramato Thank you for your efforts, I will continue to pay attention to its changes

[mramato]

This is fixed in master and will be released as part of 1.68 on April 1st.