1 files changed, 15 insertions, 0 deletions
diff --git a/ext/mixed/js/extension.js b/ext/mixed/js/extension.js
index 54862e19..12ed9c1f 100644
--- a/ext/mixed/js/extension.js
+++ b/ext/mixed/js/extension.js
@@ -133,3 +133,18 @@ function promiseTimeout(delay, resolveValue) {
 
     return promise;
 }
+
+function stringReplaceAsync(str, regex, replacer) {
+    let match;
+    let index = 0;
+    const parts = [];
+    while ((match = regex.exec(str)) !== null) {
+        parts.push(str.substring(index, match.index), replacer(...match, match.index, str));
+        index = regex.lastIndex;
+    }
+    if (parts.length === 0) {
+        return Promise.resolve(str);
+    }
+    parts.push(str.substring(index));
+    return Promise.all(parts).then(v => v.join(''));
+}