Build Error in Vue 2.7.15 After Latest locale.js Update

[mnvivek]

Hi Team,

We are currently using Vue version 2.7.15. After the latest update made this morning in locale.js, we are encountering the following build error:

ERROR in ./node_modules/d3-format/src/locale.js
Module parse failed: Unexpected token (48:26)
You may need an appropriate loader to handle this file type.
|     // Compute the prefix and suffix.
|     // For SI-prefix, the suffix is lazily computed.
|     var prefix = (options?.prefix !== undefined ? options.prefix : "") + (symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : ""),
|         suffix = (symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : "") + (options?.suffix !== undefined ? options.suffix : "");
| 

It appears that the issue is related to optional chaining (?.) syntax, which is not being transpiled correctly in our current build setup.

Kindly check and help resolve this issue at the earliest.

Thanks & Regards,
Vivek MN

[mbostock]

Okay, you must be using a JavaScript runtime that is older than ES2020 if it doesn’t support optional chaining. I can rewrite this for now. In the near future we will introduce a major version bump that allows us to use modern JavaScript syntax.

[mnvivek]

Thank you for the quick update and fix. We appreciate your support and the workaround.