invert

Author: GeoffreyBooth

doc/api/esm.md

@@ -1087,7 +1087,7 @@ _isImports_, _conditions_)
 >     1. If _packageType_ is not **null**, then
 >        1. Return _packageType_.
 >     2. If `--experimental-detect-module` is enabled and the result of
->        **CONTAINS\_MODULE\_SYNTAX**(_source_) is true, then
+>        **DETECT\_MODULE\_SYNTAX**(_source_) is true, then
 >        1. Return _"module"_.
 >     3. Return _"commonjs"_.
 > 11. If _url_ does not have any extension, then
@@ -1124,20 +1124,16 @@ _isImports_, _conditions_)
 >    1. Throw an _Invalid Package Configuration_ error.
 > 4. Return the parsed JSON source of the file at _pjsonURL_.
 
-**CONTAINS\_MODULE\_SYNTAX**(_source_)
-
-> 1. Parse _source_ as a CommonJS module.
-> 2. If the parse is successful, return **false**.
-> 3. Else inspect the error message thrown. Return **true** if it is a syntax
->    error thrown by any of the following:
->    * `import` statement (static only, _not_ dynamic `import()`)
->    * `export` statement
->    * `import.meta`
->    * `await` at the top level
->    * A lexical redeclaration of any of the CommonJS wrapper variables
->      (`require`, `exports`, `module`, `__filename`, `__dirname`) at the top
->      level
-> 4. Else return **false**.
+**DETECT\_MODULE\_SYNTAX**(_source_)
+
+> 1. Parse _source_ as an ECMAScript module.
+> 2. If the parse is successful, then
+>    1. If _source_ contains top-level `await`, static `import` or `export`
+        statements, or `import.meta`, return *true*.
+>    2. If _source_ contains a top-level lexical declaration (`const`, `let`,
+        or `class`) of any of the CommonJS wrapper variables (`require`,
+       `exports`, `module`, `__filename`, or `__dirname`) then return *true*.
+> 3. Else return *false*.
 
 ### Customizing ESM specifier resolution algorithm