Class HtmlService

    • HtmlService allows scripts to return HTML and other text content to a browser safely through sanitization.

    • Security measures are in place to prevent scripts from directly returning malicious content.

    • The service includes properties like SandboxMode and XFrameOptionsMode for controlling client-side script behavior and security.

    • Methods are available to create HtmlOutput objects from various sources, including strings, blobs, and files.

    • The service also provides methods for creating HtmlTemplate objects for dynamic content generation.
    Html Service

    Service for returning HTML and other text content from a script.

    Due to security considerations, scripts cannot directly return content to a browser. Instead, they must sanitize the HTML so that it cannot perform malicious actions. See the description of Html Output for what limitations this implies on what can be returned.

    Properties

    Property Type Description
    Sandbox Mode
    		Sandbox Mode An enum representing the sandbox modes that can be used for client-side Html Service scripts.
    XFrameOptionsMode
    		XFrameOptionsMode An enum representing the X-Frame-Options modes that can be used for client-side Html Service scripts.

    Methods

    Method Return type Brief description
    create Html Output()
    		Html Output Creates a new Html Output object that can be returned from the script.
    create Html Output(blob)
    		Html Output Creates a new Html Output object from a Blob Source resource.
    create Html Output(html)
    		Html Output Creates a new Html Output object that can be returned from the script.
    create Html Output From File(filename)
    		Html Output Creates a new Html Output object from a file in the code editor.
    create Template(blob)
    		Html Template Creates a new Html Template object from a Blob Source resource.
    create Template(html)
    		Html Template Creates a new Html Template object that can be returned from the script.
    create Template From File(filename)
    		Html Template Creates a new Html Template object from a file in the code editor.
    get User Agent()
    		String Gets the user-agent string for the current browser.

    Detailed documentation

    create Html Output()

    Creates a new Html Output object that can be returned from the script.

     const 
  
 output 
  
 = 
  
 HtmlService 
 . 
 createHtmlOutput 
 ();

    Return

    Html Output — the new HtmlOutput object

    create Html Output(blob)

    Creates a new Html Output object from a Blob Source resource.

     function 
  
 createFromBlob 
 ( 
 blob 
 ) 
  
 { 
  
 const 
  
 output 
  
 = 
  
 HtmlService 
 . 
 createHtmlOutput 
 ( 
 blob 
 ); 
  
 return 
  
 output 
 ; 
 }

    Parameters

    Name Type Description
    blob
    		Blob Source the object to get HTML out of

    Return

    Html Output — the new Html Output object

    Throws

    Error — if the blob doesn't contain HTML or the HTML is malformed

    create Html Output(html)

    Creates a new Html Output object that can be returned from the script.

     const 
  
 output 
  
 = 
  
 HtmlService 
 . 
 createHtmlOutput 
 ( 
 '<b>Hello world!</b>' 
 );

    Parameters

    Name Type Description
    html
    		String the content to serve

    Return

    Html Output — the new HtmlOutput object

    Throws

    Error — if the html is malformed

    create Html Output From File(filename)

    Creates a new Html Output object from a file in the code editor.

     const 
  
 output 
  
 = 
  
 HtmlService 
 . 
 createHtmlOutputFromFile 
 ( 
 'myPage' 
 );

    Parameters

    Name Type Description
    filename
    		String the name of the file to use

    Return

    Html Output — the new Html Output object

    Throws

    Error — if the file wasn't found or the HTML in it is malformed

    create Template(blob)

    Creates a new Html Template object from a Blob Source resource.

     function 
  
 createFromBlob 
 ( 
 blob 
 ) 
  
 { 
  
 const 
  
 template 
  
 = 
  
 HtmlService 
 . 
 createTemplate 
 ( 
 blob 
 ); 
  
 const 
  
 output 
  
 = 
  
 template 
 . 
 evaluate 
 (); 
  
 return 
  
 output 
 ; 
 }

    Parameters

    Name Type Description
    blob
    		Blob Source The object to get HTML out of.

    Return

    Html Template — the new Html Template object

    Throws

    Error — if the blob doesn't contain HTML

    create Template(html)

    Creates a new Html Template object that can be returned from the script.

     const 
  
 template 
  
 = 
  
 HtmlService 
 . 
 createTemplate 
 ( 
  
 '<b>The time is &lt;?= new Date() ?&gt;</b>' 
 , 
 );

    Parameters

    Name Type Description
    html
    		String the content of the template

    Return

    Html Template — the new Html Template object

    create Template From File(filename)

    Creates a new Html Template object from a file in the code editor.

     const 
  
 template 
  
 = 
  
 HtmlService 
 . 
 createTemplateFromFile 
 ( 
 'myTemplate' 
 );

    Parameters

    Name Type Description
    filename
    		String the name of the file to use

    Return

    Html Template — the new Html Template object

    Throws

    Error — if the file wasn't found

    get User Agent()

    Gets the user-agent string for the current browser. Returns null for most script executions if not used in a web app's do Get() or do Post() function.

    Return

    String — the user-agent string
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