recordFormWithRecordTypes.js

import { LightningElement, api, wire, track } from 'lwc';
import { getObjectInfo } from 'lightning/uiObjectInfoApi';
import ACCOUNT_OBJECT from '@salesforce/schema/Account';
import ACCOUNT_NAME from '@salesforce/schema/Account.Name';
import INDUSTRY_NAME from '@salesforce/schema/Account.Industry';
import PHONE_VALUE from '@salesforce/schema/Account.Phone';

export default class RecordFormWithRecordTypes extends LightningElement {
    @api recordId;
    @api objectApiName;

    @track objectInfo;

    fields=[ACCOUNT_NAME, INDUSTRY_NAME, PHONE_VALUE];

    @wire(getObjectInfo, {objectApiName: ACCOUNT_OBJECT})
    objectInfo;

    get recordTypeId() {
        const rtis = this.objectInfo.data.recordTypeInfos;
        console.log(' ##### ' + JSON.stringify(rtis));
        console.log(' ##2### ' + Object.keys(rtis).find(rti => rtis[rti].name === 'Partner'));
        return Object.keys(rtis).find(rti => rtis[rti].name === 'Partner');
    }

}