diff --git a/zh-cn/application-dev/reference/apis/js-apis-media.md b/zh-cn/application-dev/reference/apis/js-apis-media.md
index c70cfa79355d4b6f60caa6f2a6f429d40d5ac317..00e2cf4e9007c4857b3ab8d96e29918ba067522c 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-media.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-media.md
@@ -2004,7 +2004,7 @@ eventEmitter.on('prepare', () => {
 });
 
 media.createVideoRecorder((err, recorder) => {
-    if (err == null && recorder) != null) {
+    if (err == null && recorder != null) {
         videoRecorder = recorder;
         console.info('createVideoRecorder success');
         eventEmitter.emit('prepare');                                        // prepare事件触发