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    Activity › Forums › Salesforce® Discussions › What are Local and Global ids with respect to Salesforce Lightning Component?

    Tagged: Client Side Controller, Global Component ID, HTML, Javascript Code, Local Component ID, Metadata, Salesforce Lightning Component, SFDC

    • Salesforce® Discussions

      What are Local and Global ids with respect to Salesforce Lightning Component?

      Posted by Aman on September 23, 2018 at 11:19 PM

      What are Local and Global ids with respect to Salesforce Lightning Component?

      Avnish Yadav replied 7 years, 5 months ago 4 Members · 3 Replies
      • Client Side Controller
      • Global Component ID
      • HTML
      • Javascript Code
      • Local Component ID
      • Metadata
      • Salesforce Lightning Component
      • SFDC
    • 3 Replies
    • shariq

      Member
      September 23, 2018 at 11:19 PM

      Component IDs
      A component has two types of IDs: a local ID and a global ID. You can retrieve a component using its local ID in your JavaScript code. A global ID can be useful to differentiate between multiple instances of a component or for debugging purposes.

      Local IDs
      A local ID is an ID that is only scoped to the component. A local ID is often unique but it’s not required to be unique.
      Create a local ID by using the aura:id attribute. For example:
      Find the button component by calling cmp.find(“button1”) in your client-side controller, where cmp is a reference to the component containing the button.

      Global IDs
      Every component has a unique globalId, which is the generated runtime-unique ID of the component instance. A global ID (1) is not guaranteed to be the same beyond the lifetime of a component, so it should never be relied on. A global ID can be useful to differentiate between multiple instances of a component or for debugging purposes.

    • Parul

      Member
      September 23, 2018 at 11:32 PM

      Every component has a unique globalId, which is the generated run=me-­‐unique  ID of the component instance.

      • A  global  ID is not guaranteed to be the same beyond the life=me of a component, so it should never be relied on.
      • To create a unique ID for an HTML element, use the globalId as a prefix or suffix for the element.
      • Use  the  getGlobalId() function in JavaScript to get a component's global  ID.
      • Get a component from its global ID.

      <div  id="{!globalId  +  '_footer'}"></div>
      var  cmp  =  $A.getComponent(globalId);
      var  globalId  =  cmp.getGlobalId();

    • Avnish Yadav

      Member
      September 25, 2018 at 6:17 AM

      Hello,

      A component has two types of IDs: a local ID and a global ID.
      You can retrieve a component using its local ID in your JavaScript code.
      A global ID can be useful to differentiate between multiple instances of a component or for debugging purposes.
      Local ID is created by using the aura:id attribute.
      example
      To find the local ID for a component in JavaScript, use cmp.getLocalId()
      Every component has a unique globalId, which is the generated runtime-unique ID of the component instance.
      A global ID is not guaranteed to be the same beyond the lifetime of a component, so it should never be relied on

      Thanks

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