<my-custom-component></my-custom-component>

<div data-user-id="12345"></div>

<template>
  <div class="profile-card-header">Hello</div>
</template>

npm install -g prettier prettier-plugin-apex @prettier/plugin-xml\

console.log("変数値", this.variable);

System.debug('変数値: ' + this.variable);

console.log(JSON.stringify({ 変数値: this.variable }));

System.debug('[DEBUG] variableList: ' + JSON.serialize(variableList));

console.log('[LOG] ファイル名 関数名 1');

className supplie = new className();
supplie.supplierName = 'テスト株式会社';

DaoclassName dao = new DaoclassName();
String query = dao.getSalesOrderDetailQuery(supplie, Date.today(), false);

List<SObject> records = Database.query(query);
System.debug('取得件数: ' + records.size());

global class SearchFilterItem {
    @AuraEnabled
    public String fieldA { get; set; }
    @AuraEnabled
    public String fieldB { get; set; }
    @AuraEnabled
    public String fieldC { get; set; }

    // コンストラクタはグローバルで初期化値を空文字にする
    global SearchFilterItem() {
        fieldA = '';
        fieldB = '';
        fieldC = '';
    }
}

connectedCallback() {

}

<template>
    <div onchildnotification={ghostMethod}>
        <div onchildnotification={handleChildNotification}>
            <lightning-textarea value="Parent Component"></lightning-textarea>
            <c-child-comp></c-child-comp>
        </div>
    </div>
</template>

import { LightningElement } from 'lwc';

export default class ParentComp extends LightningElement {
    handleChildNotification() {
        console.log('Child Event arrived');
    }
}

<template>
    <lightning-button label="Notify Parent Comp" onclick={notifyParent}></lightning-button>
</template>

import { LightningElement } from 'lwc';

export default class ChildComp extends LightningElement {
    notifyParent() {
        const event = new CustomEvent('childnotification', { bubbles: true });
        this.dispatchEvent(event);
    }
}

<div onchildnotification={ghostMethod}>
    <div onchildnotification={handleChildNotification}>
        <lightning-textarea value="Parent Component"></lightning-textarea>
        <c-child-comp></c-child-comp>
    </div>
</div>

const event = new CustomEvent('childnotification', { bubbles: true, composed: true });

    /* eslint-disable no-await-in-loop */

    /* eslint-enable no-await-in-loop */

const userid = event.target.value;

const userid = event.target.value ?? a;

const userid = event.target.value ? event.target.value : a;

  /**
   * 現在ログインしているユーザー名
   */
  @AuraEnabled(cacheable=true)
  public static User getCurrentUser() {
    return [SELECT Id, Name, Email FROM User WHERE Id = :UserInfo.getUserId()];
  }

import getCurrentUser from "@salesforce/apex/Apexクラス名.getCurrentUser";

  @wire(getCurrentUser)
  wiredUser({ error, data }) {
    if (data) {
      this.currentUser = data;
      console.log("ユーザー名:", this.currentUser.Name);
    } else if (error) {
      console.error(error);
    }
  }

Id currentUserId = UserInfo.getUserId();
System.debug('ユーザーID: ' + currentUserId);

import USER_ID from '@salesforce/user/Id';
console.log('ログインユーザーID:', this.userId);

return { ...existingData, updatedProperty: newValue };

<template>
  <c-child-component message="こんにちは"></c-child-component>
</template>

import { LightningElement, api } from 'lwc';

export default class ChildComponent extends LightningElement {
  @api message;  // 親から受け取るプロパティ
}

public with sharing class AccountPaginationController {
    @AuraEnabled(cacheable=true)
    public static List<Account> getAccounts(Integer pageSize, Integer pageNumber) {
        Integer offsetSize = (pageNumber - 1) * pageSize;
        return [
            SELECT Id, Name
            FROM Account
            ORDER BY Name
            LIMIT :pageSize OFFSET :offsetSize
        ];
    }

    @AuraEnabled(cacheable=true)
    public static Integer getTotalCount() {
        return [SELECT count() FROM Account];
    }
}

import { LightningElement, track } from 'lwc';
import getAccounts from '@salesforce/apex/AccountPaginationController.getAccounts';
import getTotalCount from '@salesforce/apex/AccountPaginationController.getTotalCount';

export default class PaginationSample extends LightningElement {
    @track accounts = [];
    @track currentPage = 1;
    pageSize = 10;
    totalRecords = 0;
    totalPages = 0;

    connectedCallback() {
        this.loadData();
    }

    loadData() {
        getTotalCount()
            .then(count => {
                this.totalRecords = count;
                this.totalPages = Math.ceil(count / this.pageSize);
                this.fetchAccounts();
            });
    }

    fetchAccounts() {
        getAccounts({ pageSize: this.pageSize, pageNumber: this.currentPage })
            .then(result => {
                this.accounts = result;
            });
    }

    handleNext() {
        if (this.currentPage < this.totalPages) {
            this.currentPage++;
            this.fetchAccounts();
        }
    }

    handlePrev() {
        if (this.currentPage > 1) {
            this.currentPage--;
            this.fetchAccounts();
        }
    }
}

<template>
    <template if:true={accounts}>
        <template for:each={accounts} for:item="acc">
            <p key={acc.Id}>{acc.Name}</p>
        </template>
    </template>

    <div>
        <button onclick={handlePrev} disabled={currentPage <= 1}>Previous</button>
        <span>Page {currentPage} of {totalPages}</span>
        <button onclick={handleNext} disabled={currentPage >= totalPages}>Next</button>
    </div>
</template>

検索結果の上限を超えています。検索条件を変更ください。Apex CPU time limit exceededApex CPU time limit exceeded

<!-- ↓子コンポーネントのパブリックプロパティに値を渡す。 -->
<c-child name-value={name}></c-child>

// JS側で名前を設定
name = 'Taro';

 <!-- 親から渡された値を使用して、名前を出力。 -->
<div class="sample" style={backgroundStyle}>
    <span>Child: {nameValue}</span>
</div>

// @apiをつけることで親コンポーネントからアクセス可能。
import { LightningElement, api } from 'lwc';

export default class Child extends LightningElement {
    @api nameValue;
}

<!-- 子要素がクリックされたときに handleClick を実行 -->
<a onclick={handleClick}>
    <div class="sample">
        <span>{itemLabel}</span>
    </div>
</a>

import { LightningElement, api } from 'lwc';

export default class Child extends LightningElement {
    @api itemLabel;

    handleClick() {
        const itemSelectedEvent = new CustomEvent('itemselect', {
            detail: this.itemLabel
        });
        this.dispatchEvent(itemSelectedEvent);
    }
}

const customEvent = new CustomEvent('itemselect', {
    detail: this.itemLabel,
    bubbles: true,     // 親へバブル
    composed: true     // シャドウDOMを超えて伝播
});
this.dispatchEvent(customEvent);

<!-- 子コンポーネントからのイベント「itemselect」をハンドリング -->
<c-child
    item-label="Item A"
    onitemselect={handleItemSelect}
    class="slds-m-horizontal_small">
</c-child>

<c-child
    item-label="Item B"
    onitemselect={handleItemSelect}
    class="slds-m-horizontal_small">
</c-child>

import { LightningElement } from 'lwc';

export default class Parent extends LightningElement {
    selectedItem;

    handleItemSelect(event) {
        this.selectedItem = event.detail;
    }
}

System.assertNotEquals(expected, actual, [message]);

System.assertNotEquals(5, 10, '5 と 10 は異なる');

System.assertNotEquals(null, 'Some Value', 'null ではない');

Account acc = new Account(Name = 'Test Account');
insert acc;

System.assertNotEquals(null, acc, 'Accountが正常に作成された');