fix: shallow-copied locals options for posthtml-expressions

Author: nokazn

lib/index.js

@@ -20,7 +20,7 @@ module.exports = (options = {}) => {
       let content;
       let subtree;
       let source;
-      const posthtmlExpressionsOptions = options.posthtmlExpressionsOptions || {locals: false};
+      let posthtmlExpressionsOptions = options.posthtmlExpressionsOptions || {locals: false};
       if (options.delimiters) {
         posthtmlExpressionsOptions.delimiters = options.delimiters;
       }
@@ -32,7 +32,10 @@ module.exports = (options = {}) => {
         try {
           const localsRaw = node.attrs.locals || (node.content ? node.content.join().replace(/\n/g, '') : false);
           const localsJson = JSON.parse(localsRaw);
-          posthtmlExpressionsOptions.locals = posthtmlExpressionsOptions.locals ? Object.assign(localsJson, posthtmlExpressionsOptions.locals) : localsJson;
+          posthtmlExpressionsOptions = {
+            ...posthtmlExpressionsOptions,
+            locals: posthtmlExpressionsOptions.locals ? Object.assign(localsJson, posthtmlExpressionsOptions.locals) : localsJson
+          };
         } catch {}
 
         if (posthtmlExpressionsOptions.locals) {