LWC: Fetch picklist values

<!-- fetchPicklistValues.html -->
<template>
    <lightning-card title="WireGetPicklistValues" icon-name="custom:custom67">
        <template if:true={picklistValues.data}>
            <div class="slds-m-around_medium">
                <template for:each={picklistValues.data.values} for:item="item">
                    <lightning-input
                        key={item.value}
                        label={item.label}
                        data-value={item.value}
                        type="checkbox"
                        onchange={handleCheckboxChange}
                    ></lightning-input>
                </template>
            </div>
        </template>
    </lightning-card>
</template>

// fetchPicklistValues.js
import { LightningElement, wire } from 'lwc';
import { getPicklistValues } from 'lightning/uiObjectInfoApi';
import TYPE_FIELD from '@salesforce/schema/Account.Type';

import { getObjectInfo } from 'lightning/uiObjectInfoApi';
import ACCOUNT_OBJECT from '@salesforce/schema/Account';

export default class FetchPicklistValues extends LightningElement {

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

    @wire(getPicklistValues, {
        recordTypeId: '$objectInfo.data.defaultRecordTypeId',
        fieldApiName: TYPE_FIELD
    })
    picklistValues;

    handleCheckboxChange(event) {
        console.log(event.target.dataset.value);
        console.log(event.target.checked);
    }
}

As per documentation, use getPicklistValues wire adapter (from lightning/uiObjectInfoApi module) to fetch picklist values for a specified field.

Parameters:

• recordTypeId—(Required) The ID of the record type. Use the Object Info defaultRecordTypeId property, which is returned from getObjectInfo or getRecordUi.
• fieldApiName—(Required) The API name of the picklist field on a supported object.
• propertyOrFunction—A private property or function that receives the stream of data from the wire service. If a property is decorated with @wire, the results are returned to the property’s data property or error property. If a function is decorated with  @wire, the results are returned in an object with a data property and an error property.

Find out more about the data inside objectInfo and picklistValues variable:

Using Dynamic Apex to retrieve Picklist Values

USECASE: Fetch the picklist values from Industry field of Account sObject.

List<SelectOption> options = new List<SelectOption>();

Schema.DescribeFieldResult fieldResult = Account.Industry.getDescribe();
List<Schema.PicklistEntry> picklistEntries = fieldResult.getPicklistValues();

for (Schema.PicklistEntry picklistEntry : picklistEntries) {
    options.add(new SelectOption(picklistEntry.getLabel(), picklistEntry.getValue()));
}

return options;

OR

List<SelectOption> options = new List<SelectOption>();

Map<String, Schema.SObjectField> fieldMap = Account.getSObjectType().getDescribe().fields.getMap();
List<Schema.PicklistEntry> picklistEntries = fieldMap.get('Industry').getDescribe().getPickListValues();

for (Schema.PicklistEntry picklistEntry : picklistEntries) {
    options.add(new SelectOption(picklistEntry.getLabel(), picklistEntry.getValue()));
}

return options;