SFDCWallah

Apex Best Practices:

• Don’t use hardcoded IDs
• No DML or SOQL inside loops
• Exception handling
• Code should be bulkified

Trigger Best Practices:

• There should be one trigger per object
• Should be bulkified and able to process at least 200 records
• Use collections to retrieve records in single query
• Proper naming convention
• Follows apex best practices also

Visualforce Page Best Practices:

• Don’t use hardcoded picklist values
• JavaScript and CSS should be stored in static resource
• Use transient variable, if variable is not used in server call
• View state size must be under 135KB
• Have you notice, In VF pages view state is generated only when you use form tag otherwise it will not generate? Try and comment below.

Test Class Best Practices:

• Should have all the data needed for the method
• Don’t use SeeAllData=true
• Proper assert statements
• Should include both positive and negative test cases
• Use Test.startTest() and Test.stopTest properly
• Use System.runAs() to execute code as a specific user.

Lightning Component Best Practices:

• Don’t fetch same data in different components
• Use LDS wherever is possible
• Data filtering or caching logic should be on the client side
• Limit the use of Application events
• Use base lightning components
• Use SLDS
• Proper use of bound and unbound expressions.

For detailed information follow these links:

https://xperiencepartage.wordpress.com/2018/11/30/what-is-the-purpose-of-using-test-starttest-and-test-stoptest

https://xperiencepartage.wordpress.com/2018/12/24/lightning-data-service

https://xperiencepartage.wordpress.com/2019/02/07/lightning-component-best-practices

https://xperiencepartage.wordpress.com/2019/08/31/gaps-between-salesforce-classic-and-lightning-experience