Using uiObjectInfoApi api will allow us to retrieve the available metadata about a specific object. Like object label,  fields, recordtypes etc… all that and without writing a single line of APEX. 

How to use:

1. Import getObjectInfo method.
2. Pass the object api name as a parameter or import the object name from the schema.

Example:

import { LightningElement, wire } from 'lwc';
import { getObjectInfo } from 'lightning/uiObjectInfoApi';
import ACCOUNT_OBJECT from '@salesforce/schema/Account';

export default class Example extends LightningElement {
    @wire(getObjectInfo, { objectApiName: ACCOUNT_OBJECT })
    accountInfo;
}

Pulling the ACCOUNT_OBJECT using the @salesforce/schema will provide compile-time safety to ensure the sObject is available on the schema. But, we are allowed to replaced it with a String for dynamic purposes.

Response:

{
  "data": {
    "apiName": "Account",
    "childRelationships": [
      {
        "childObjectApiName": "Account",
        "fieldName": "ParentId",
        "junctionIdListNames": [],
        "junctionReferenceTo": [],
        "relationshipName": "ChildAccounts"
      },
      ...
    ],
    "createable": true,
    "custom": false,
    "defaultRecordTypeId": "012000000000000AAA",
    "deletable": true,
    "dependentFields": {},
    "feedEnabled": true,
    "fields": {
      "Name": {
        "apiName": "Name",
        "calculated": false,
        "compound": true,
        "compoundComponentName": null,
        "compoundFieldName": "Name",
        "controllerName": null,
        "controllingFields": [],
        "createable": true,
        "custom": false,
        "dataType": "String",
        "extraTypeInfo": "SwitchablePersonName",
        "filterable": true,
        "filteredLookupInfo": null,
        "highScaleNumber": false,
        "htmlFormatted": false,
        "inlineHelpText": null,
        "label": "Account Name",
        "length": 255,
        "nameField": true,
        "polymorphicForeignKey": false,
        "precision": 0,
        "reference": false,
        "referenceTargetField": null,
        "referenceToInfos": [],
        "relationshipName": null,
        "required": true,
        "scale": 0,
        "searchPrefilterable": false,
        "sortable": true,
        "unique": false,
        "updateable": true
      },
      ...
    },
    "keyPrefix": "001",
    "label": "Account",
    "labelPlural": "Accounts",
    "layoutable": true,
    "mruEnabled": true,
    "nameFields": [
      "Name"
    ],
    "queryable": true,
    "recordTypeInfos": {
      "012000000000000AAA": {
        "available": true,
        "defaultRecordTypeMapping": true,
        "master": true,
        "name": "Master",
        "recordTypeId": "012000000000000AAA"
      }
    },
    "searchable": true,
    "themeInfo": {
      "color": "7F8DE1",
      "iconUrl": "https://ability-java-7718-dev-ed.cs26.my.salesforce.com/img/icon/t4v35/standard/account_120.png"
    },
    "updateable": true
  }
}

The Call will return the following result data – I have removed all fields and child relationship from this json for brevity.

Once we have the response we can access and get any metadata value we need…

Common use cases:

Get Record Type Ids

    // GET DEFAULT RECORD TYPE ID
    get defaultRecordTypeId() {
        return this.accountInfo.data.defaultRecordTypeId;
    }
   
    // GET DEFAULT RECORD TYPE BY NAME
    fetchRecordTypeIdByName(recordTypeName) {
        // Returns a map of record type Ids 
        const rtis = this.objectInfo.data.recordTypeInfos;
        return Object.keys(rtis).find(rti => rtis[rti].name === recordTypeName);
    }

Get Child Relationships from a parent object

get childReletionshipsInfo(){
        return this.accountInfo.data.childRelationships;
}

Get Object Label and Plural Label

// label
get objectLabel(){
     return this.accountInfo.data.label;
}
// plural label
get objectPluralLabel(){
    return this.accountInfo.data.labelPlural;
}

Resources:

• getObjectInfo – Documentation