Summary

close #8649

Runtime Condition

Runtime Condition is used when an export is utilized in one runtime but not in another. Rspack will generate code like this:

if (__webpack_require__.j === 'main') {
var lib = __webpack_require__('./foo');
}

This means that if users enter this code, the execution of 'foo' and its sub-modules will only occur if they go through the main runtime; otherwise, it can be skipped.

In our architecture, modules are connected through various connections. Some connections point to the same module, where one may be active in a particular runtime while others are not. This scenario can occur.

When this happens, we need to ensure that all connections are valid for the concatenated module to function properly.

if (__webpack_require__.j === 'bar') {
var lib = __webpack_require__('./foo');
}
if (__webpack_require__.j === 'foo') {
var lib = __webpack_require__('./foo');
}

We must guarantee that 'lib' can be active for all possible runtimes. In the previous implementation, we incorrectly used only one of valid runtime.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).