var demo = COSDocPreviewSDK.config({
    mode: 'normal', 
})

COSDocPreviewSDK.config({
    // Common option, which is applicable to all types of files.
    commonOptions: {
      isShowTopArea: false, // Hide the top area (header and toolbar).
      isShowHeader: false // Hide the header area.

    },
    // Word file configurations.
    wordOptions: {
      isShowDocMap: false,
      isBestScale: true
    },
    // PDF file configurations.
    pdfOptions: {
      isShowComment: true,
      isInSafeMode: false
    },
    // Presentation file configurations.
    pptOptions: {
      isShowBottomStatusBar: true
    }
})

COSDocPreviewSDK.config({
    // Common option, which is applicable to all types of files.
    commandBars: [
      {
        cmbId: 'Print', // Component ID
        attributes:{
          visible: false, // Whether to show the component. Valid values: `false` (no), `true` (yes). Default value: `true`.
          enable: false, // Whether to enable the component. Default value: `true`.
        },
      },
    ]
})