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The new Playground Starter app launches automatically when Salesforce Trailhead Playground is opened. It provides tips, best practices insights and walk-throughs to help users launch packages and applications in Trailhead, and easy access to login credentials.

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Main advantages of using LWC over Lightning Components, are:

• LWC is Fast.
• Improved API support for third-party APIs.
• It is light-weight.

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Constructor() method fires when a component instance is created.

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The ability to create decorators is part of ECMAScript, but these three decorators are unique to Lightning Web Components. @api: To expose a public property, decorate it with @api. Public properties define the API for a component.

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Federation ID is a unique username for each user that can be shared across multiple apps. Sometimes the ID is the user's employee ID.

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Immutability is the idea that data or objects should not be modified after they are created. ... Pat Helland of Salesforce gives a great talk on how “Immutability Changes Everything“.

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The Lightning Web Components programming model has three decorators that add functionality to a property or function.
The ability to create decorators is part of ECMAScript, but these three decorators are unique to Lightning Web Components.

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Decorators dynamically alter the functionality of a property or function. The ability to create decorators is part of ECMAScript, but these three decorators are unique to Lightning Web Components. @api: To expose a public property, decorate it with @api. Public properties define the API for a component.

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From Setup, enter Sharing Settings in the Quick Find box, then select Sharing Settings. Click Edit in the Organization-Wide Defaults area. Select the Manual User Record Sharing checkbox to display the Sharing button on user detail pages, which enables users to share their records with others.

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So when someone “asks” Salesforce to update a record, Salesforce first locks the record so no one else can update it until the lock is released. If someone tries to (asks for an) update the record while it's locked, Salesforce will try up to 10 times to obtain a record lock, before giving up, and throwing an error.

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Salesforce DX adds new tools that streamline the entire development life cycle. It improves team development and collaboration, facilitates automated testing and continuous integration, and makes the release cycle more efficient and agile. But Salesforce DX is so much more than just a new set of tools!

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1. Using Record Type & Page Layouts: Create two different record types say “Open” & “Locked” and change the record type of the record using workflow field update or trigger. And then create a separate page layout for the “Locked” record type with all fields marked as ‘Read-Only’. Remove the ‘Edit’ and ‘Delete’ buttons from the page layout. However, this is not an option if you are using record types for some other purpose and do not want to change it just to meet this requirement. Also, note that using this to lock records is not a fool-proof solution as users will still be able to edit the record from the list view.

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Selects one or more values from a one-dimensional array given a start and, optionally, an end position, and returns a one-dimensional array. An error occurs if the start value is greater than the end value.

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Decorators dynamically alter the functionality of a property or function. The ability to create decorators is part of ECMAScript, but these three decorators are unique to Lightning Web Components. @api: To expose a public property, decorate it with @api. Public properties define the API for a component.

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Import a wire adapter using named import syntax. import { wire} from 'lwc'; Decorate a property or function with @wire and specify the wire adapter. Each wire adapter defines a data type.

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1. Create lightning component.
2. Step 2 : Create lightning component tab.
3. Step 3 : Add component tab on Salesforce1 navigation menu.

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Aura:Method enables you to directly call a method in a component's client-side controller instead of firing / handling a component event. With the help of <aura:method > we can call child component method from parent component. Get Message from Child Component to parent Component.

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1. In the global search bar, enter Edge, and select the Edge Communications account.
2. Click. and select Edit Page.
3. Drag a Flow component to the top of the right column in the canvas.
4. For Flow, select the flow we created earlier: Sample Flow.
5. Save and activate your changes.

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1. Create a new Flow with Salesforce as the Service used for identity.
2. Drag a Data Load element into the Flow.
3. Create a new Data Action.
4. For the Value to load, either select a Value of Kind: Object, Type: Contact or create a new Value of Kind: Object, Type: Contact.
5. Use the Contact binding for loading the data.

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Your data is secure with salesforce.com. Your data will be completely inaccessible to your competitors. ... When you access our site using a supported web browser, Secure Socket Layer (SSL) technology protects your information using both server authentication and data encryption.

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Salesforce provides three layers of security with lots of flexibility to accommodate virtually any business need. Profiles controls object-level and field-level access. Permission sets are used to provide access to additional objects. Field-level security controls provide access to individual fields within an object.

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With Health Check, you can identify and fix vulnerabilities in your security settings, all from a single page. A summary score shows how well your org is aligned with the Salesforce-recommended standard. Typically, if you change your settings to be less restrictive, your score decreases.

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Workflow Action : A workflow action, such as an email alert, field update, outbound message, or task, fires when the conditions of a workflow rule are met. Email Alert : Email alerts are actions that send emails, using a specified email template, to specified recipients

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Increase the 'Maximum Number of Actions Per Workflow Rule' limit. By default, the number of actions per workflow rule is set to 10 for every organization. If you need more than 10 actions when a workflow rule is triggered, you can contact Salesforce Support and request to increase it up to 25.

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Time-dependent actions are executed at a specific time, such as 10 days before a record's close date. When that specific time passes, the workflow rule re-evaluates the record to make sure that it still meets the rule criteria. If the record does, the workflow rule executes those actions. This known as Time Trigger.