[3.0.0-beta.3] TypeScript issue when building

[santam85]

• Chart.js version: 3.0.0-beta.3
• TypeScript version: 3.9.7

When attempting to build a TypeScript project importing chart.js, I get the following error when building:

ERROR: node_modules/chart.js/dist/chunks/index.d.ts:1291:1 - error TS1046: Top-level declarations in .d.ts files must start with either a 'declare' or 'export' modifier.

1291 enum ScaleTypeEnum {
     ~~~~

An unhandled exception occurred: node_modules/chart.js/dist/chunks/index.d.ts:1291:1 - error TS1046: Top-level declarations in .d.ts files must start with either a 'declare' or 'export' modifier.

1291 enum ScaleTypeEnum {
     ~~~~

Seems to be related to this long-standing issue in TypeScript: microsoft/TypeScript#3792

[etimberg]

Thanks for reporting this @santam85. When you get the error, what are you importing from Chart.js? I have a project written in Typescript (v3.7.5) that uses Chart.js and I did not run into this when upgrading to beta.3.

[xr0master]

@santam85 use skipLibCheck flag for TS.
@etimberg he is right, we have this issue here. Need to add declare keyword for enums.

[emmcb]

In fact now I added the registry interfaces, I think we can get rid of enum completely and simply use the registry keys. I will propose a PR in this direction.