shrink panic workaround version range

src/components/Features.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
   import type { TransformOptions } from 'esbuild'
   import { Mode, parseOptions } from '../helpers/options'
+  import { version_in_range } from '../helpers/versions'
   import { version, input, options, status, output } from '../stores'
   import { tick } from 'svelte'
   import Editor from './Editor.svelte'
@@ -131,9 +132,11 @@
       }
       if (this.cancelled) return
 
+      const skip_object_accessors =  && version_in_range(esbuild.version, '0.21.0', '0.21.4')
+
       for (const feat of features) {
-        // Bypass a bug where esbuild >= 0.21.0 will panic without the 'object-accessors' feature.
-        if (feat === 'object-accessors' && esbuild.version >= '0.21.0') {
+        // Bypass a bug where esbuild 0.21.0..0.21.4 will panic without the 'object-accessors' feature.
+        if (skip_object_accessors && feat === 'object-accessors') {
           continue
         }
         options.supported = { [feat]: false }

src/helpers/versions.ts

@@ -21,3 +21,30 @@ export async function fetch_versions(name: string): Promise<string[]> {
 
   throw new Error(`Failed to fetch versions for ${name}`)
 }
+
+export function version_in_range(v: string, left: string, right: string): boolean {
+  const a = parse(v)
+  const b = parse(left)
+  const c = parse(right)
+  return ge(a, b) && le(a, c)
+}
+
+function parse(v: string): number[] {
+  return v.split('.').map((v) => parseInt(v, 10))
+}
+
+function ge(a: number[], b: number[]): boolean {
+  for (let i = 0; i < a.length; i++) {
+    if (a[i] < b[i]) return false
+    if (a[i] > b[i]) return true
+  }
+  return true
+}
+
+function le(a: number[], b: number[]): boolean {
+  for (let i = 0; i < a.length; i++) {
+    if (a[i] > b[i]) return false
+    if (a[i] < b[i]) return true
+  }
+  return true
+}