diff --git a/html/src/repository/shared.js b/html/src/repository/shared.js
new file mode 100644
index 00000000..4d5f78fb
--- /dev/null
+++ b/html/src/repository/shared.js
@@ -0,0 +1,110 @@
+// requires binding of SharedVariable
+
+function transformKey(key) {
+    return String(key).toLowerCase();
+}
+
+function get(key, defaultValue = null) {
+    key = transformKey(key);
+    var value = SharedVariable.Get(key);
+    if (value === undefined) {
+        return defaultValue;
+    }
+    return value;
+}
+
+function set(key, value) {
+    key = transformKey(key);
+    value = String(value);
+    SharedVariable.Set(key, value);
+}
+
+function getBool(key, defaultValue = null) {
+    var value = get(key, null);
+    if (value === null) {
+        return defaultValue;
+    }
+    return value === 'true';
+}
+
+function setBool(key, value) {
+    set(key, value ? 'true' : 'false');
+}
+
+function getInt(key, defaultValue = null) {
+    var value = get(key, null);
+    if (value === null) {
+        return defaultValue;
+    }
+    value = parseInt(value, 10);
+    if (isNaN(value) === true) {
+        return defaultValue;
+    }
+    return value;
+}
+
+function setInt(key, value) {
+    set(key, value);
+}
+
+function getFloat(key, defaultValue = null) {
+    var value = get(key, null);
+    if (value === null) {
+        return defaultValue;
+    }
+    value = parseFloat(value);
+    if (isNaN(value) === true) {
+        return defaultValue;
+    }
+    return value;
+}
+
+function setFloat(key, value) {
+    set(key, value);
+}
+
+function getObject(key, defaultValue = null) {
+    var value = get(key, null);
+    if (value === null) {
+        return defaultValue;
+    }
+    try {
+        value = JSON.parse(value);
+    } catch (err) {
+    }
+    if (value !== Object(value)) {
+        return defaultValue;
+    }
+    return value;
+}
+
+function setObject(key, value) {
+    set(key, JSON.stringify(value));
+}
+
+function getArray(key, defaultValue = null) {
+    var value = getObject(key, null);
+    if (Array.isArray(value) === false) {
+        return defaultValue;
+    }
+    return value;
+}
+
+function setArray(key, value) {
+    setObject(key, value);
+}
+
+export default {
+    get,
+    set,
+    getBool,
+    setBool,
+    getInt,
+    setInt,
+    getFloat,
+    setFloat,
+    getObject,
+    setObject,
+    getArray,
+    setArray
+};