my.navigateBack

<!-- AXML -->
<view class="header">
  <view class="back-btn" onTap="goBack">
    <text>Back</text>
  </view>
  <text class="title">Detail</text>
</view>

Page({
  goBack() {
    my.navigateBack();
  }
});

Page({
  async submitForm() {
    try {
      await this.saveData();
      my.showToast({
        content: 'Saved successfully',
        type: 'success'
      });

      // Return to previous page after delay
      setTimeout(() => {
        my.navigateBack();
      }, 1500);
    } catch (err) {
      my.showToast({
        content: 'Save failed',
        type: 'fail'
      });
    }
  }
});

// If page stack is: Home > List > Detail > Edit
// Go directly back to List (skip Detail)
Page({
  onSaveAndReturn() {
    my.navigateBack({
      delta: 2
    });
  }
});