SFDCWallah

Lightning Application:

• Standalone lightning app has custom URL can be hosted and run using the URL.
• Can have components.
• Standalone apps .app extension.
• Checkbox lightning out dependency app used to make available the LEX App for VF Pages.
• <aura: application extends=”force:slds”> used to apply LEX UI.
• It’s not possible to use lightning out app in LEX experience.

Component Attributes:

• Attributes makes your component more dynamic and can store value of different type.
• Attribute name must start with letter or underscore.
• Attribute name must have 2 or more characters.
• It’s a best practice to declare all the attribute names at the top of the component as that makes your code more readable.
• Three access specifiers for attributes:
  • Global: can be used in any namespace
  • Public: within the same namespace only
  • Private: only within the container app, interface, component or event

• <aura: attribute name=”buttonLabel” type=”String” default=”Search”>
• These data types are available:
  • Boolean
  • String
  • Integer
  • Double
  • Long
  • Decimal
  • List
  • Set
  • Map
  • Object
  • Date
  • DateTime
• Getting and Setting Attribute value:
  • get attribute value: var value=component.get(“v.attritbuteName”);
  • set attribute value: component.set(“v.attributeName”,value);
  • calling controller function: onclick or some event: {!c.functionName}
  • Finding component by id: component.find(“id”).set(“new_value”); or get(“v.value”);

Expressions:

• Allows you to access attribute values
• Expression doesn’t support function calls
• Can be used for dynamic output
• {!expression}: called as bound expression. Fetch new value of attribute automatically as soon as attribute value is modified by component.
• {#expression}: called as unbound expression. It doesn’t refresh value automatically.
• Use {!v.attribute} or {#v.attribute}

To clear the cache:

Go to Setup->Type Component->Click Lightning Component->Enable Checkbox “Enable Debug Mode”