fix #1594: update manual compat table overrides

CHANGELOG.md

@@ -1,5 +1,21 @@
 # Changelog
 
+## Unreleased
+
+* Update JavaScript syntax feature compatibility tables ([#1594](https://github.com/evanw/esbuild/issues/1594))
+
+    Most JavaScript syntax feature compatibility data is able to be obtained automatically via https://kangax.github.io/compat-table/. However, they are missing data for quite a few new JavaScript features (see ([kangax/compat-table#1034](https://github.com/kangax/compat-table/issues/1034))) so data on these new features has to be added manually. This release manually adds a few new entries:
+
+    * Top-level await
+
+        This feature lets you use `await` at the top level of a module, outside of an `async` function. Doing this holds up the entire module instantiation operation until the awaited expression is resolved or rejected. This release marks this feature as supported in Edge 89, Firefox 89, and Safari 15 (it was already marked as supported in Chrome 89 and Node 14.8). The data source for this is https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await.
+
+    * Arbitrary module namespace identifier names
+
+        This lets you use arbitrary strings as module namespace identifier names as long as they are valid UTF-16 strings. An example is `export { x as "🍕" }` which can then be imported as `import { "🍕" as y } from "./example.js"`. This release marks this feature as supported in Firefox 87 (it was already marked as supported in Chrome 90 and Node 16). The data source for this is https://bugzilla.mozilla.org/show_bug.cgi?id=1670044.
+
+    I would also like to add data for Safari. They have recently added support for arbitrary module namespace identifier names (https://bugs.webkit.org/show_bug.cgi?id=217576) and `export * as` (https://bugs.webkit.org/show_bug.cgi?id=214379). However, I have no idea how to determine which Safari release these bugs correspond to so this compatibility data for Safari has been omitted.
+
 ## 0.12.26
 
 * Add `--analyze` to print information about the bundle ([#1568](https://github.com/evanw/esbuild/issues/1568))

internal/compat/js_table.go

@@ -87,8 +87,9 @@ func (features JSFeature) Has(feature JSFeature) bool {
 
 var jsTable = map[JSFeature]map[Engine][]int{
 	ArbitraryModuleNamespaceNames: {
-		Chrome: {90},
-		Node:   {16},
+		Chrome:  {90},
+		Firefox: {87},
+		Node:    {16},
 	},
 	ArraySpread: {
 		Chrome:  {46},
@@ -419,8 +420,11 @@ var jsTable = map[JSFeature]map[Engine][]int{
 		Safari:  {9},
 	},
 	TopLevelAwait: {
-		Chrome: {89},
-		Node:   {14, 8},
+		Chrome:  {89},
+		Edge:    {89},
+		Firefox: {89},
+		Node:    {14, 8},
+		Safari:  {15},
 	},
 	UnicodeEscapes: {
 		Chrome:  {44},

scripts/compat-table.js

@@ -165,6 +165,9 @@ mergeVersions('ExportStarAs', {
   es2020: true,
   firefox80: true,
   node12: true, // From https://developer.mozilla.org/en-US/docs/web/javascript/reference/statements/export
+
+  // This feature has been implemented in Safari but I have no idea what version
+  // this bug corresponds to: https://bugs.webkit.org/show_bug.cgi?id=214379
 })
 
 // Manually copied from https://caniuse.com/#search=import.meta
@@ -180,7 +183,10 @@ mergeVersions('ImportMeta', {
 // Manually copied from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await
 mergeVersions('TopLevelAwait', {
   chrome89: true,
+  edge89: true,
+  firefox89: true,
   node14_8: true,
+  safari15: true,
 })
 
 // Manually copied from https://caniuse.com/es6-module-dynamic-import
@@ -193,15 +199,23 @@ mergeVersions('DynamicImport', {
   safari11_1: true,
 })
 
-// From https://github.com/tc39/ecma262/pull/2154#issuecomment-825201030
 mergeVersions('ArbitraryModuleNamespaceNames', {
+  // From https://github.com/tc39/ecma262/pull/2154#issuecomment-825201030
   chrome90: true,
   node16: true,
+
+  // From https://bugzilla.mozilla.org/show_bug.cgi?id=1670044
+  firefox87: true,
+
+  // This feature has been implemented in Safari but I have no idea what version
+  // this bug corresponds to: https://bugs.webkit.org/show_bug.cgi?id=217576
 })
 
-// From https://www.chromestatus.com/feature/5765269513306112
 mergeVersions('ImportAssertions', {
+  // From https://www.chromestatus.com/feature/5765269513306112
   chrome91: true,
+
+  // Not yet in Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1668330
 })
 
 for (const test of [...es5.tests, ...es6.tests, ...stage4.tests, ...stage1to3.tests]) {