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fix: avoid false-positive WebView transpile guard failures

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Keep chrome69 downleveling for Android 9 WebViews, but only hard-fail on
logical assignment after transpile. Regex/polyfill feature detects and
minified ternaries can contain `??`/`?.` character sequences that are not
optional chaining or nullish coalescing operators.
This commit is contained in:
kuekhaoyang
2026-07-25 14:48:28 +08:00
parent e04b306334
commit 1179148031
2 changed files with 10 additions and 6 deletions
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scripts/transpile-client-assets.mjs
+6 -4
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@@ -6,9 +6,11 @@ import { transform } from 'esbuild';
// Android 9 / Amlogic TV WebViews are often Chrome 66–74.
// chrome83 still emits `??` (Chrome 80+), which white-screens those devices.
// chrome69 downlevels `??` / `?.` / logical assignment in application code.
const TARGET = 'chrome69';
// Logical assignment + nullish coalescing + optional chaining break old WebViews.
const UNSUPPORTED_MODERN_SYNTAX = /(\?\?=|\|\|=|&&=|\?\?|\?\.)/;
// Hard-fail only on logical assignment: unambiguous and never appears in polyfill
// feature-detect regexes (e.g. `/()??/`) or minified ternaries (`E?.3:1`).
const UNSUPPORTED_LOGICAL_ASSIGNMENT = /(\?\?=|\|\|=|&&=)/;
async function pathExists(filePath) {
try {
@@ -50,8 +52,8 @@ async function transpileFile(filePath) {
await fs.writeFile(filePath, result.code);
if (UNSUPPORTED_MODERN_SYNTAX.test(result.code)) {
throw new Error(`${filePath} still contains modern syntax unsupported by ${TARGET} after transpilation.`);
if (UNSUPPORTED_LOGICAL_ASSIGNMENT.test(result.code)) {
throw new Error(`${filePath} still contains logical assignment syntax after ${TARGET} transpilation.`);
}
}