Flip/flop

15 files changed, 80 insertions, 79 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1b22c34..2aabec5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Unreleased
 
 - The `function` module gains the `constant` function.
+- The internal `gleam_stdlib.js` module has been renamed to `gleam_stdlib.mjs`.
 
 ## v0.18.0 - 2021-11-23
 ## v0.18.0-rc1 - 2021-11-23
diff --git a/bin/test.sh b/bin/test.sh
index 777c50b..97bd34d 100755
--- a/bin/test.sh
+++ b/bin/test.sh
@@ -3,5 +3,5 @@ set -eu
 OUT=gen/javascript
 rm -fr $OUT
 gleam compile-package --name gleam_stdlib --target javascript --src src --test test --out $OUT
-cp src/*.js $OUT/
+cp src/*.*js $OUT/
 node bin/run-tests.js
diff --git a/src/gleam/base.gleam b/src/gleam/base.gleam
index 5134cc0..7ec1558 100644
--- a/src/gleam/base.gleam
+++ b/src/gleam/base.gleam
@@ -18,7 +18,7 @@ if erlang {
 
 if javascript {
   external fn do_encode64(BitString) -> String =
-    "../gleam_stdlib.js" "encode64"
+    "../gleam_stdlib.mjs" "encode64"
 }
 
 /// Decodes a base 64 encoded string into a `BitString`.
@@ -38,7 +38,7 @@ if erlang {
 
 if javascript {
   external fn do_decode64(String) -> Result(BitString, Nil) =
-    "../gleam_stdlib.js" "decode64"
+    "../gleam_stdlib.mjs" "decode64"
 }
 
 /// Encodes a `BitString` into a base 64 encoded string with URL and filename safe alphabet.
diff --git a/src/gleam/bit_string.gleam b/src/gleam/bit_string.gleam
index a30b40d..eee006c 100644
--- a/src/gleam/bit_string.gleam
+++ b/src/gleam/bit_string.gleam
@@ -15,7 +15,7 @@ if erlang {
 
 if javascript {
   external fn do_from_string(String) -> BitString =
-    "../gleam_stdlib.js" "bit_string_from_string"
+    "../gleam_stdlib.mjs" "bit_string_from_string"
 }
 
 /// Returns an integer which is the number of bytes in the bit string.
@@ -31,7 +31,7 @@ if erlang {
 
 if javascript {
   external fn do_byte_size(BitString) -> Int =
-    "../gleam_stdlib.js" "length"
+    "../gleam_stdlib.mjs" "length"
 }
 
 /// Creates a new bit string by joining two binaries.
@@ -76,7 +76,7 @@ if javascript {
     position: Int,
     length: Int,
   ) -> Result(BitString, Nil) =
-    "../gleam_stdlib.js" "bit_string_slice"
+    "../gleam_stdlib.mjs" "bit_string_slice"
 }
 
 /// Tests to see whether a bit string is valid UTF-8.
@@ -126,7 +126,7 @@ if erlang {
 
 if javascript {
   external fn do_to_string(BitString) -> Result(String, Nil) =
-    "../gleam_stdlib.js" "bit_string_to_string"
+    "../gleam_stdlib.mjs" "bit_string_to_string"
 }
 
 /// Creates a new bit string by joining multiple binaries.
@@ -147,5 +147,5 @@ if erlang {
 
 if javascript {
   external fn do_concat(List(BitString)) -> BitString =
-    "../gleam_stdlib.js" "bit_string_concat"
+    "../gleam_stdlib.mjs" "bit_string_concat"
 }
diff --git a/src/gleam/dynamic.gleam b/src/gleam/dynamic.gleam
index d48bd24..a3c43d8 100644
--- a/src/gleam/dynamic.gleam
+++ b/src/gleam/dynamic.gleam
@@ -34,7 +34,7 @@ if erlang {
 
 if javascript {
   external fn do_from(anything) -> Dynamic =
-    "../gleam_stdlib.js" "identity"
+    "../gleam_stdlib.mjs" "identity"
 }
 
 /// Unsafely casts a Dynamic value into any other type.
@@ -55,7 +55,7 @@ if erlang {
 
 if javascript {
   external fn do_unsafe_coerce(Dynamic) -> a =
-    "../gleam_stdlib.js" "identity"
+    "../gleam_stdlib.mjs" "identity"
 }
 
 /// Checks to see whether a `Dynamic` value is a bit_string, and returns that bit string if
@@ -80,7 +80,7 @@ if erlang {
 
 if javascript {
   external fn decode_bit_string(Dynamic) -> Result(BitString, DecodeError) =
-    "../gleam_stdlib.js" "decode_bit_string"
+    "../gleam_stdlib.mjs" "decode_bit_string"
 }
 
 /// Checks to see whether a `Dynamic` value is a string, and returns that string if
@@ -113,7 +113,7 @@ if erlang {
 
 if javascript {
   external fn decode_string(Dynamic) -> Result(String, DecodeError) =
-    "../gleam_stdlib.js" "decode_string"
+    "../gleam_stdlib.mjs" "decode_string"
 }
 
 /// Return a string indicating the type of the dynamic value.
@@ -134,7 +134,7 @@ if erlang {
 
 if javascript {
   external fn do_classify(Dynamic) -> String =
-    "../gleam_stdlib.js" "classify_dynamic"
+    "../gleam_stdlib.mjs" "classify_dynamic"
 }
 
 /// Checks to see whether a `Dynamic` value is an int, and returns that int if it
@@ -159,7 +159,7 @@ if erlang {
 
 if javascript {
   external fn decode_int(Dynamic) -> Result(Int, DecodeError) =
-    "../gleam_stdlib.js" "decode_int"
+    "../gleam_stdlib.mjs" "decode_int"
 }
 
 /// Checks to see whether a `Dynamic` value is a float, and returns that float if
@@ -184,7 +184,7 @@ if erlang {
 
 if javascript {
   external fn decode_float(Dynamic) -> Result(Float, DecodeError) =
-    "../gleam_stdlib.js" "decode_float"
+    "../gleam_stdlib.mjs" "decode_float"
 }
 
 /// Checks to see whether a `Dynamic` value is a bool, and returns that bool if
@@ -209,7 +209,7 @@ if erlang {
 
 if javascript {
   external fn decode_bool(Dynamic) -> Result(Bool, DecodeError) =
-    "../gleam_stdlib.js" "decode_bool"
+    "../gleam_stdlib.mjs" "decode_bool"
 }
 
 /// Checks to see whether a `Dynamic` value is a list, and returns that list if it
@@ -237,7 +237,7 @@ if erlang {
 
 if javascript {
   external fn decode_list(Dynamic) -> Result(List(Dynamic), DecodeError) =
-    "../gleam_stdlib.js" "decode_list"
+    "../gleam_stdlib.mjs" "decode_list"
 }
 
 /// Checks to see whether a `Dynamic` value is a result, and returns that result if
@@ -267,7 +267,7 @@ if erlang {
 
 if javascript {
   external fn decode_result(Dynamic) -> Result(Result(a, e), DecodeError) =
-    "../gleam_stdlib.js" "decode_result"
+    "../gleam_stdlib.mjs" "decode_result"
 }
 
 /// Checks to see whether a `Dynamic` value is a result of a particular type, and
@@ -379,7 +379,7 @@ if javascript {
     Dynamic,
     Decoder(a),
   ) -> Result(Option(a), DecodeError) =
-    "../gleam_stdlib.js" "decode_option"
+    "../gleam_stdlib.mjs" "decode_option"
 }
 
 /// Checks to see if a `Dynamic` value is a map with a specific field, and returns
@@ -407,7 +407,7 @@ if erlang {
 
 if javascript {
   external fn decode_field(Dynamic, name) -> Result(Dynamic, DecodeError) =
-    "../gleam_stdlib.js" "decode_field"
+    "../gleam_stdlib.mjs" "decode_field"
 }
 
 /// Checks to see if a `Dynamic` value is a tuple large enough to have a certain
@@ -487,13 +487,13 @@ if erlang {
 
 if javascript {
   external fn decode_tuple(Dynamic) -> Result(UnknownTuple, DecodeError) =
-    "../gleam_stdlib.js" "decode_tuple"
+    "../gleam_stdlib.mjs" "decode_tuple"
 
   external fn tuple_get(UnknownTuple, Int) -> Result(Dynamic, DecodeError) =
-    "../gleam_stdlib.js" "tuple_get"
+    "../gleam_stdlib.mjs" "tuple_get"
 
   external fn tuple_size(UnknownTuple) -> Int =
-    "../gleam_stdlib.js" "length"
+    "../gleam_stdlib.mjs" "length"
 }
 
 /// Checks to see if a `Dynamic` value is a 2-element tuple.
@@ -840,7 +840,7 @@ if erlang {
 
 if javascript {
   external fn decode_map(Dynamic) -> Result(Map(Dynamic, Dynamic), DecodeError) =
-    "../gleam_stdlib.js" "decode_map"
+    "../gleam_stdlib.mjs" "decode_map"
 }
 
 if erlang {
diff --git a/src/gleam/float.gleam b/src/gleam/float.gleam
index e714bcb..3f5399e 100644
--- a/src/gleam/float.gleam
+++ b/src/gleam/float.gleam
@@ -22,7 +22,7 @@ if erlang {
 
 if javascript {
   external fn do_parse(String) -> Result(Float, Nil) =
-    "../gleam_stdlib.js" "parse_float"
+    "../gleam_stdlib.mjs" "parse_float"
 }
 
 /// Returns the string representation of the provided `Float`.
@@ -115,7 +115,7 @@ if erlang {
 
 if javascript {
   external fn do_ceiling(Float) -> Float =
-    "../gleam_stdlib.js" "ceiling"
+    "../gleam_stdlib.mjs" "ceiling"
 }
 
 /// Rounds the value to the next lowest whole number as a `Float`.
@@ -136,7 +136,7 @@ if erlang {
 
 if javascript {
   external fn do_floor(Float) -> Float =
-    "../gleam_stdlib.js" "floor"
+    "../gleam_stdlib.mjs" "floor"
 }
 
 /// Rounds the value to the nearest whole number as an `Int`.
@@ -167,7 +167,7 @@ if javascript {
   }
 
   external fn js_round(Float) -> Int =
-    "../gleam_stdlib.js" "round"
+    "../gleam_stdlib.mjs" "round"
 }
 
 /// Returns the value as an `Int`, truncating all decimal digits.
@@ -188,7 +188,7 @@ if erlang {
 
 if javascript {
   external fn do_truncate(Float) -> Int =
-    "../gleam_stdlib.js" "truncate"
+    "../gleam_stdlib.mjs" "truncate"
 }
 
 /// Returns the absolute value of the input as a `Float`.
@@ -230,7 +230,7 @@ if erlang {
 
 if javascript {
   external fn do_power(Float, Float) -> Float =
-    "../gleam_stdlib.js" "power"
+    "../gleam_stdlib.mjs" "power"
 }
 
 /// Returns the square root of the input as a `Float`.
diff --git a/src/gleam/int.gleam b/src/gleam/int.gleam
index 756e0eb..fa794d3 100644
--- a/src/gleam/int.gleam
+++ b/src/gleam/int.gleam
@@ -38,7 +38,7 @@ if erlang {
 
 if javascript {
   external fn do_parse(String) -> Result(Int, Nil) =
-    "../gleam_stdlib.js" "parse_int"
+    "../gleam_stdlib.mjs" "parse_int"
 }
 
 /// Prints a given int to a string.
@@ -59,7 +59,7 @@ if erlang {
 
 if javascript {
   external fn do_to_string(Int) -> String =
-    "../gleam_stdlib.js" "to_string"
+    "../gleam_stdlib.mjs" "to_string"
 }
 
 /// For use in `to_base_string` when base is outside of the allowed range.
@@ -102,7 +102,7 @@ if erlang {
 
 if javascript {
   external fn do_to_base_string(Int, Int) -> String =
-    "../gleam_stdlib.js" "int_to_base_string"
+    "../gleam_stdlib.mjs" "int_to_base_string"
 }
 
 /// Prints a given int to a string using base2.
@@ -173,7 +173,7 @@ if erlang {
 
 if javascript {
   external fn do_to_float(a: Int) -> Float =
-    "../gleam_stdlib.js" "identity"
+    "../gleam_stdlib.mjs" "identity"
 }
 
 /// Restricts an int between a lower and upper bound.
diff --git a/src/gleam/io.gleam b/src/gleam/io.gleam
index 3139e73..4b3e998 100644
--- a/src/gleam/io.gleam
+++ b/src/gleam/io.gleam
@@ -23,7 +23,7 @@ if erlang {
 
 if javascript {
   external fn do_print(String) -> Nil =
-    "../gleam_stdlib.js" "print"
+    "../gleam_stdlib.mjs" "print"
 }
 
 /// Writes a string to standard output, appending a newline to the end.
@@ -47,7 +47,7 @@ if erlang {
 
 if javascript {
   external fn do_println(String) -> Nil =
-    "../gleam_stdlib.js" "log"
+    "../gleam_stdlib.mjs" "log"
 }
 
 /// Prints a value to standard output using Erlang syntax.
@@ -85,7 +85,7 @@ if erlang {
 
 if javascript {
   external fn debug_print(anything) -> Nil =
-    "../gleam_stdlib.js" "debug"
+    "../gleam_stdlib.mjs" "debug"
 }
 
 if erlang {
diff --git a/src/gleam/map.gleam b/src/gleam/map.gleam
index 41decf1..ad3b184 100644
--- a/src/gleam/map.gleam
+++ b/src/gleam/map.gleam
@@ -42,7 +42,7 @@ if erlang {
 
 if javascript {
   external fn do_size(Map(k, v)) -> Int =
-    "../gleam_stdlib.js" "map_size"
+    "../gleam_stdlib.mjs" "map_size"
 }
 
 /// Converts the map to a list of 2-element tuples `#(key, value)`, one for
@@ -69,7 +69,7 @@ if erlang {
 
 if javascript {
   external fn do_to_list(Map(key, value)) -> List(#(key, value)) =
-    "../gleam_stdlib.js" "map_to_list"
+    "../gleam_stdlib.mjs" "map_to_list"
 }
 
 /// Converts a list of 2-element tuples `#(key, value)` to a map.
@@ -130,7 +130,7 @@ if erlang {
 
 if javascript {
   external fn do_new() -> Map(key, value) =
-    "../gleam_stdlib.js" "new_map"
+    "../gleam_stdlib.mjs" "new_map"
 }
 
 /// Fetches a value from a map for a given key.
@@ -157,7 +157,7 @@ if erlang {
 
 if javascript {
   external fn do_get(Map(key, value), key) -> Result(value, Nil) =
-    "../gleam_stdlib.js" "map_get"
+    "../gleam_stdlib.mjs" "map_get"
 }
 
 /// Inserts a value into the map with the given key.
@@ -184,7 +184,7 @@ if erlang {
 
 if javascript {
   external fn do_insert(key, value, Map(key, value)) -> Map(key, value) =
-    "../gleam_stdlib.js" "map_insert"
+    "../gleam_stdlib.mjs" "map_insert"
 }
 
 /// Updates all values in a given map by calling a given function on each key
@@ -401,7 +401,7 @@ if erlang {
 
 if javascript {
   external fn do_delete(k, Map(k, v)) -> Map(k, v) =
-    "../gleam_stdlib.js" "map_remove"
+    "../gleam_stdlib.mjs" "map_remove"
 }
 
 /// Creates a new map from a given map with all the same entries except any with
diff --git a/src/gleam/regex.gleam b/src/gleam/regex.gleam
index 99d8dd6..79c6620 100644
--- a/src/gleam/regex.gleam
+++ b/src/gleam/regex.gleam
@@ -62,7 +62,7 @@ if erlang {
 
 if javascript {
   external fn do_compile(String, with: Options) -> Result(Regex, CompileError) =
-    "../gleam_stdlib.js" "compile_regex"
+    "../gleam_stdlib.mjs" "compile_regex"
 }
 
 /// Creates a new `Regex`.
@@ -110,7 +110,7 @@ if erlang {
 
 if javascript {
   external fn do_check(Regex, String) -> Bool =
-    "../gleam_stdlib.js" "regex_check"
+    "../gleam_stdlib.mjs" "regex_check"
 }
 
 /// Splits a string.
@@ -136,7 +136,7 @@ if javascript {
   }
 
   external fn js_split(String, Regex) -> List(String) =
-    "../gleam_stdlib.js" "split"
+    "../gleam_stdlib.mjs" "split"
 }
 
 /// Collects all matches of the regular expression.
@@ -167,5 +167,5 @@ if erlang {
 
 if javascript {
   external fn do_scan(Regex, String) -> List(Match) =
-    "../gleam_stdlib.js" "regex_scan"
+    "../gleam_stdlib.mjs" "regex_scan"
 }
diff --git a/src/gleam/string.gleam b/src/gleam/string.gleam
index ff41a6c..d54a0f6 100644
--- a/src/gleam/string.gleam
+++ b/src/gleam/string.gleam
@@ -53,7 +53,7 @@ if erlang {
 
 if javascript {
   external fn do_length(String) -> Int =
-    "../gleam_stdlib.js" "string_length"
+    "../gleam_stdlib.mjs" "string_length"
 }
 
 /// Reverses a `String`.
@@ -115,7 +115,7 @@ if erlang {
 
 if javascript {
   external fn do_lowercase(String) -> String =
-    "../gleam_stdlib.js" "lowercase"
+    "../gleam_stdlib.mjs" "lowercase"
 }
 
 /// Creates a new `String` with all the graphemes in the input `String` converted to
@@ -139,7 +139,7 @@ if erlang {
 
 if javascript {
   external fn do_uppercase(String) -> String =
-    "../gleam_stdlib.js" "uppercase"
+    "../gleam_stdlib.mjs" "uppercase"
 }
 
 /// Compares two `String`s to see which is "larger" by comparing their graphemes.
@@ -172,7 +172,7 @@ if erlang {
 
 if javascript {
   external fn less_than(String, String) -> Bool =
-    "../gleam_stdlib.js" "less_than"
+    "../gleam_stdlib.mjs" "less_than"
 }
 
 /// Takes a substring given a start and end grapheme indexes. Negative indexes
@@ -218,7 +218,7 @@ if erlang {
 
 if javascript {
   external fn do_slice(String, Int, Int) -> String =
-    "../gleam_stdlib.js" "slice_string"
+    "../gleam_stdlib.mjs" "slice_string"
 }
 
 /// Drops contents of the first `String` that occur before the second `String`.
@@ -246,7 +246,7 @@ if erlang {
 
 if javascript {
   external fn do_crop(String, String) -> String =
-    "../gleam_stdlib.js" "crop_string"
+    "../gleam_stdlib.mjs" "crop_string"
 }
 
 /// Drops *n* graphemes from the left side of a `String`.
@@ -307,7 +307,7 @@ if javascript {
   }
 
   external fn index_of(String, String) -> Int =
-    "../gleam_stdlib.js" "index_of"
+    "../gleam_stdlib.mjs" "index_of"
 }
 
 /// Checks whether the first `String` starts with the second one.
@@ -328,7 +328,7 @@ if erlang {
 
 if javascript {
   external fn do_starts_with(String, String) -> Bool =
-    "../gleam_stdlib.js" "starts_with"
+    "../gleam_stdlib.mjs" "starts_with"
 }
 
 /// Checks whether the first `String` ends with the second one.
@@ -349,7 +349,7 @@ if erlang {
 
 if javascript {
   external fn do_ends_with(String, String) -> Bool =
-    "../gleam_stdlib.js" "ends_with"
+    "../gleam_stdlib.mjs" "ends_with"
 }
 
 /// Creates a list of `String`s by splitting a given string on a given substring.
@@ -405,7 +405,7 @@ if javascript {
     x: String,
     substring: String,
   ) -> Result(#(String, String), Nil) =
-    "../gleam_stdlib.js" "split_once"
+    "../gleam_stdlib.mjs" "split_once"
 }
 
 /// Creates a new `String` by joining two `String`s together.
@@ -559,7 +559,7 @@ if erlang {
 
 if javascript {
   external fn do_trim(string: String) -> String =
-    "../gleam_stdlib.js" "trim"
+    "../gleam_stdlib.mjs" "trim"
 }
 
 /// Removes whitespace on the left of a `String`.
@@ -581,7 +581,7 @@ if erlang {
 
 if javascript {
   external fn do_trim_left(string: String) -> String =
-    "../gleam_stdlib.js" "trim_left"
+    "../gleam_stdlib.mjs" "trim_left"
 }
 
 /// Removes whitespace on the right of a `String`.
@@ -603,7 +603,7 @@ if erlang {
 
 if javascript {
   external fn do_trim_right(string: String) -> String =
-    "../gleam_stdlib.js" "trim_right"
+    "../gleam_stdlib.mjs" "trim_right"
 }
 
 /// Splits a non-empty `String` into its head and tail. This lets you
@@ -627,7 +627,7 @@ if erlang {
 
 if javascript {
   external fn do_pop_grapheme(string: String) -> Result(#(String, String), Nil) =
-    "../gleam_stdlib.js" "pop_grapheme"
+    "../gleam_stdlib.mjs" "pop_grapheme"
 }
 
 /// Converts a `String` to a list of graphemes.
@@ -649,7 +649,7 @@ if erlang {
 
 if javascript {
   external fn unsafe_int_to_utf_codepoint(Int) -> UtfCodepoint =
-    "../gleam_stdlib.js" "codepoint"
+    "../gleam_stdlib.mjs" "codepoint"
 }
 
 /// Converts an integer to a `UtfCodepoint`.
diff --git a/src/gleam/string_builder.gleam b/src/gleam/string_builder.gleam
index f1cc22a..e6562a0 100644
--- a/src/gleam/string_builder.gleam
+++ b/src/gleam/string_builder.gleam
@@ -62,7 +62,7 @@ if erlang {
 
 if javascript {
   external fn do_append(StringBuilder, StringBuilder) -> StringBuilder =
-    "../gleam_stdlib.js" "add"
+    "../gleam_stdlib.mjs" "add"
 }
 
 /// Converts a list of strings into a builder.
@@ -80,7 +80,7 @@ if erlang {
 
 if javascript {
   external fn do_from_strings(List(String)) -> StringBuilder =
-    "../gleam_stdlib.js" "join"
+    "../gleam_stdlib.mjs" "join"
 }
 
 /// Joins a list of builders into a single builder.
@@ -98,7 +98,7 @@ if erlang {
 
 if javascript {
   external fn do_concat(List(StringBuilder)) -> StringBuilder =
-    "../gleam_stdlib.js" "join"
+    "../gleam_stdlib.mjs" "join"
 }
 
 /// Converts a string into a builder.
@@ -116,7 +116,7 @@ if erlang {
 
 if javascript {
   external fn do_from_string(String) -> StringBuilder =
-    "../gleam_stdlib.js" "identity"
+    "../gleam_stdlib.mjs" "identity"
 }
 
 /// Turns an `StringBuilder` into a `String`
@@ -135,7 +135,7 @@ if erlang {
 
 if javascript {
   external fn do_to_string(StringBuilder) -> String =
-    "../gleam_stdlib.js" "identity"
+    "../gleam_stdlib.mjs" "identity"
 }
 
 /// Returns the size of the `StringBuilder` in bytes.
@@ -151,7 +151,7 @@ if erlang {
 
 if javascript {
   external fn do_byte_size(StringBuilder) -> Int =
-    "../gleam_stdlib.js" "length"
+    "../gleam_stdlib.mjs" "length"
 }
 
 /// Creates a builder containing the textual representation of a given float.
@@ -167,7 +167,7 @@ if erlang {
 
 if javascript {
   external fn do_from_float(Float) -> StringBuilder =
-    "../gleam_stdlib.js" "float_to_string"
+    "../gleam_stdlib.mjs" "float_to_string"
 }
 
 /// Converts a builder to a new builder where the contents have been
@@ -184,7 +184,7 @@ if erlang {
 
 if javascript {
   external fn do_lowercase(StringBuilder) -> StringBuilder =
-    "../gleam_stdlib.js" "lowercase"
+    "../gleam_stdlib.mjs" "lowercase"
 }
 
 /// Converts a builder to a new builder where the contents have been
@@ -201,7 +201,7 @@ if erlang {
 
 if javascript {
   external fn do_uppercase(StringBuilder) -> StringBuilder =
-    "../gleam_stdlib.js" "uppercase"
+    "../gleam_stdlib.mjs" "uppercase"
 }
 
 /// Converts a builder to a new builder with the contents reversed.
@@ -217,7 +217,7 @@ if erlang {
 
 if javascript {
   external fn do_reverse(StringBuilder) -> StringBuilder =
-    "../gleam_stdlib.js" "string_reverse"
+    "../gleam_stdlib.mjs" "string_reverse"
 }
 
 /// Splits a builder on a given pattern into a list of builders.
@@ -244,7 +244,7 @@ if javascript {
     builder: StringBuilder,
     pattern: String,
   ) -> List(StringBuilder) =
-    "../gleam_stdlib.js" "split"
+    "../gleam_stdlib.mjs" "split"
 }
 
 /// Replaces all instances of a pattern with a given string substitute.
@@ -277,7 +277,7 @@ if erlang {
 
 if javascript {
   external fn do_replace(StringBuilder, String, String) -> StringBuilder =
-    "../gleam_stdlib.js" "string_replace"
+    "../gleam_stdlib.mjs" "string_replace"
 }
 
 /// Compares two builders to determine if they have the same textual content.
@@ -306,7 +306,7 @@ if erlang {
 
 if javascript {
   external fn do_is_equal(StringBuilder, StringBuilder) -> Bool =
-    "../gleam_stdlib.js" "equal"
+    "../gleam_stdlib.mjs" "equal"
 }
 
 /// Inspects a builder to determine if it is equivalent to an empty string.
diff --git a/src/gleam/uri.gleam b/src/gleam/uri.gleam
index 3b1c731..514a7ff 100644
--- a/src/gleam/uri.gleam
+++ b/src/gleam/uri.gleam
@@ -206,7 +206,7 @@ if erlang {
 
 if javascript {
   external fn do_parse_query(String) -> Result(List(#(String, String)), Nil) =
-    "../gleam_stdlib.js" "parse_query"
+    "../gleam_stdlib.mjs" "parse_query"
 }
 
 /// Encodes a list of key value pairs as a URI query string.
@@ -258,7 +258,7 @@ if erlang {
 
 if javascript {
   external fn do_percent_encode(String) -> String =
-    "../gleam_stdlib.js" "percent_encode"
+    "../gleam_stdlib.mjs" "percent_encode"
 }
 
 /// Decodes a percent encoded string.
@@ -282,7 +282,7 @@ if erlang {
 
 if javascript {
   external fn do_percent_decode(String) -> Result(String, Nil) =
-    "../gleam_stdlib.js" "percent_decode"
+    "../gleam_stdlib.mjs" "percent_decode"
 }
 
 fn do_remove_dot_segments(
diff --git a/src/gleam_stdlib.js b/src/gleam_stdlib.mjs
index 96fa4f1..96fa4f1 100644
--- a/src/gleam_stdlib.js
+++ b/src/gleam_stdlib.mjs
diff --git a/test/gleam/should.gleam b/test/gleam/should.gleam
index 483b1a3..3cedbcd 100644
--- a/test/gleam/should.gleam
+++ b/test/gleam/should.gleam
@@ -25,7 +25,7 @@ if javascript {
     "../gleam.js" "inspect"
 
   external fn crash(String) -> anything =
-    "../gleam_stdlib.js" "crash"
+    "../gleam_stdlib.mjs" "crash"
 
   pub fn equal(a, b) {
     case a == b {