Visualforce & Lightning Experience - Explore the Visualforce App Container
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Questions and Answers

What does the Lightning Experience application use to load its resources?

  • Static HTML shell and a lot of JavaScript (correct)
  • Dynamic HTML shell and PHP
  • Static HTML shell and CSS
  • Dynamic HTML shell and JavaScript Frameworks

    • What is the URL used to access the Lightning Experience application?

  • /lightning (correct)
  • /storm
  • /flash
  • /lightning-application

    • In the context of Lightning Experience, which statement is true regarding Visualforce pages?

  • Visualforce pages are independent of Lightning Experience.
  • Visualforce pages control the request.
  • Visualforce pages cannot be used with Lightning Experience.
  • Visualforce pages work within constraints imposed by Lightning Experience. (correct)

    • How does the browser affect the performance of a Visualforce page in Lightning Experience?

    <p>The browser enforces security and JavaScript execution constraints.</p> Signup and view all the answers

    Which of the following describes the relationship between Lightning Experience and Visualforce pages?

    <p>Lightning Experience is the parent context while Visualforce pages are the child context.</p> Signup and view all the answers

    What does the implementation of Lightning Experience imply for developers working with Visualforce?

    <p>Developers must work within evolving constraints set by Lightning Experience.</p> Signup and view all the answers

    Which aspect of JavaScript errors is highlighted in relation to Lightning Experience?

    <p>JavaScript errors are harder to discover but there are general rules for managing them.</p> Signup and view all the answers

    What is the primary type of application that Lightning Experience is characterized as?

    <p>Single-page application (SPA)</p> Signup and view all the answers

    What is one significant change in how Visualforce operates between Salesforce Classic and Lightning Experience?

    <p>Visualforce pages run inside an iframe within the Lightning container.</p> Signup and view all the answers

    Which of the following accurately describes the execution context of Visualforce pages in Lightning Experience?

    <p>They are executed in a shared SPA environment.</p> Signup and view all the answers

    Which of these is a recommended adjustment for Visualforce code when transitioning to Lightning Experience?

    <p>Update code patterns to comply with SPA standards.</p> Signup and view all the answers

    What is a notable difference in default values for Visualforce pages when running in Lightning Experience compared to Salesforce Classic?

    <p>Default access permissions become more restrictive.</p> Signup and view all the answers

    What does the Lightning Experience application structure predominantly represent?

    <p>A single-page application that streams content dynamically.</p> Signup and view all the answers

    Which element of Visualforce's functionality is impacted by its new context in Lightning Experience?

    <p>Interactions with other components in Salesforce.</p> Signup and view all the answers

    Which aspect of page rendering is primarily altered when Visualforce pages move to Lightning Experience?

    <p>Rendering occurs within a contained environment.</p> Signup and view all the answers

    How does Visualforce's role change within Lightning Experience compared to Salesforce Classic?

    <p>It serves only as a sub-component of the application.</p> Signup and view all the answers

    What happens to the standard Salesforce Classic header and sidebar when Visualforce pages run in Lightning Experience?

    <p>They are always suppressed.</p> Signup and view all the answers

    Which attribute controls the inclusion or suppression of standard Salesforce Classic stylesheets in Lightning Experience?

    <p>standardStylesheets</p> Signup and view all the answers

    What effect do the showHeader and sidebar attributes have on Visualforce pages running in Lightning Experience?

    <p>They have no effect at all.</p> Signup and view all the answers

    What distinguishes the sforce.one JavaScript Utility Object?

    <p>It provides navigation-related functions.</p> Signup and view all the answers

    How does the presence of sforce.one affect Visualforce pages in Lightning Experience?

    <p>It enables navigation events without additional setup.</p> Signup and view all the answers

    What will happen if a page is shared between Salesforce Classic and Lightning Experience regarding the attributes showHeader and sidebar?

    <p>They can be set for Salesforce Classic views only.</p> Signup and view all the answers

    Why can't the Lightning Experience header or sidebar be suppressed?

    <p>There are no corresponding attributes for suppression.</p> Signup and view all the answers

    What is the default state of the standardStylesheets attribute when running in Lightning Experience?

    <p>True</p> Signup and view all the answers

    What is the primary role of Lightning Experience in relation to Visualforce pages?

    <p>Lightning Experience acts as the parent context for Visualforce pages.</p> Signup and view all the answers

    What is one disadvantage of Visualforce pages running inside an iframe in Lightning Experience?

    <p>Limited ability to access the top-level browsing context.</p> Signup and view all the answers

    What should you consider updating when a Visualforce page communicates with services besides Salesforce?

    <p>The organization’s CORS settings.</p> Signup and view all the answers

    Which of the following is NOT an element of security that might be affected by the new Visualforce container in Lightning Experience?

    <p>Access control lists (ACL).</p> Signup and view all the answers

    What is the distinction between the browsing context of Lightning Experience and the Visualforce page?

    <p>The Visualforce page runs in an iframe, creating a separate browsing context.</p> Signup and view all the answers

    Which of the following statements regarding JavaScript errors in this context is true?

    <p>Diagnosis of JavaScript errors can be challenging.</p> Signup and view all the answers

    When Visualforce pages operate within Lightning Experience, what aspect is NOT a concern for those pages?

    <p>Interacting with external APIs seamlessly.</p> Signup and view all the answers

    What is one of the main advantages of running Visualforce pages inside an iframe from Lightning Experience's perspective?

    <p>They help maintain a consistent appearance similar to Salesforce Classic.</p> Signup and view all the answers

    What happens if a Visualforce page needs to access external services while running inside an iframe?

    <p>It may encounter issues due to cross-origin restrictions.</p> Signup and view all the answers

    Which statement best summarizes the parent-child relationship between Lightning Experience and Visualforce pages?

    <p>Visualforce pages must operate within the constraints set by Lightning Experience.</p> Signup and view all the answers

    What is the purpose of the $Api.Session_ID global variable?

    <p>It holds a unique session token for browser requests.</p> Signup and view all the answers

    What happens to the session ID when crossing hostname boundaries?

    <p>A new session ID is generated.</p> Signup and view all the answers

    Why should developers avoid manipulating window.location in Lightning Experience?

    <p>It can interfere with DOM access from other contexts.</p> Signup and view all the answers

    What is the recommended method for interacting across frame boundaries in Lightning Experience?

    <p>Using window.postMessage for cross-context communication.</p> Signup and view all the answers

    What principle should developers adhere to regarding JavaScript scope in Lightning Experience?

    <p>Avoid accessing or modifying DOM elements outside your context.</p> Signup and view all the answers

    What change occurs automatically when Visualforce pages run within Lightning Experience?

    <p>Low-level environment changes enable compatibility.</p> Signup and view all the answers

    What is a common misconception regarding session management in Lightning Experience?

    <p>Session IDs remain unchanged across requests.</p> Signup and view all the answers

    How does the same-origin policy affect Visualforce and Lightning Experience?

    <p>It creates security barriers preventing code access across domains.</p> Signup and view all the answers

    What is an action developers should not take regarding session IDs?

    <p>Pass session IDs between different domains manually.</p> Signup and view all the answers

    What should experienced JavaScript developers be cautious of when working with Visualforce in Lightning Experience?

    <p>Using certain code patterns like contentWindow that may lead to issues.</p> Signup and view all the answers

    Study Notes

    Lightning Experience Overview

    • Lightning Experience is a single-page application (SPA) accessed via the /lightning URL.
    • Upon loading, the application code takes over the environment after the resources (HTML and JavaScript) load.

    Application Startup Process

    • The startup process for a SPA is both interesting and complex, typically involving a static HTML shell and a large amount of JavaScript.
    • Familiarity with frameworks like AngularJS or React can provide insights into how Lightning Experience operates.

    Visualforce Interaction

    • Lightning Experience governs the request, meaning that it is the parent context while the Visualforce page functions as the child context.
    • Visualforce pages must adhere to constraints imposed by Lightning Experience, as children are expected to obey their parents.

    Constraints on Visualforce Pages

    • Some constraints come directly from Lightning Experience, such as the size of the frame used to display Visualforce pages.
    • Implicit constraints may arise from the browser itself, focusing on security and JavaScript execution.
    • Most pages are generally unaffected by security constraints; those that are usually fail early with clear error messages.
    • JavaScript errors can be more nuanced, making them harder to diagnose, but general rules exist to mitigate these issues.

    Visualforce in Salesforce Classic vs. Lightning Experience

    • Visualforce pages in Salesforce Classic own the page and environment, while in Lightning Experience, they run inside an iframe in a larger container.
    • Lightning Experience is a single-page application (SPA) that manages the request, creating specific constraints for Visualforce pages.
    • The execution context changes how Visualforce pages interact with the overall Salesforce application.

    Changes in Visualforce Page Functionality

    • Visualforce runs in an iframe, isolating it from the parent Lightning Experience context, which means some pages may require updates to access top-level browsing context.
    • Common code patterns needing updates include session handling and JavaScript scope adjustments due to the iframe boundaries and security policies.

    Security and Scope Impacts

    • Session maintenance and renewal must be considered due to differing session IDs between the Visualforce iframe and Lightning Experience.
    • Cross-domain requests can lead to issues, necessitating proper configuration for CORS settings.
    • JavaScript code in Visualforce cannot manipulate DOM elements in the Lightning Experience context directly; it must follow the principle of not affecting other contexts.

    Visualforce Defaults in Lightning Experience

    • The standard Salesforce Classic header and sidebar are suppressed when Visualforce runs in Lightning Experience.
    • Attributes showHeader and sidebar are always set to false and cannot be overridden for Lightning Experience.
    • The standardStylesheets attribute defaults to true but can be altered.

    sforce.one JavaScript Utility Object

    • The sforce.one utility object is automatically added in Lightning Experience for navigation purposes, providing multiple useful functions.
    • It is not available in Salesforce Classic, highlighting a key difference in capabilities between the two environments.

    Considerations for Developers

    • Developers must analyze how their existing Visualforce code will behave in the new iframe context and adjust accordingly.
    • Understanding and adhering to security constraints will mitigate issues with cross-domain requests and API interactions.
    • To maintain effective navigation across frame boundaries, using methods like window.postMessage is necessary rather than relying on direct JavaScript access.

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    Description

    Explore the intricacies of the Lightning Experience application, a single-page application (SPA) accessed via the /lightning URL. This quiz examines how SPA structures load resources, focusing on the role of static HTML and JavaScript. Ideal for those familiar with JavaScript frameworks like AngularJS.

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