Lit Element Web Components

Lit Library สร้าง Web Components 5KB Google Standard Web APIs ทุก Framework Template Literals Reactive Properties Shadow DOM Design System Component Library

Levelตำแหน่งทักษะเงินเดือน (บาท)
JuniorFrontend DeveloperHTML CSS JS React20,000-35,000
MidFrontend EngineerTypeScript, Testing, CI/CD35,000-60,000
SeniorSenior FrontendArchitecture, Performance, Mentoring60,000-100,000
LeadTech LeadTeam Leadership, System Design100,000-150,000
StaffStaff EngineerCross-team Architecture, Strategy120,000-200,000+

Lit Element Component

# === Lit Element Setup & Component ===

# npm init @open-wc
# npm install lit
# npm run dev

# src/my-card.ts
# import { LitElement, html, css } from 'lit';
# import { customElement, property, state } from 'lit/decorators.js';
#
# @customElement('my-card')
# export class MyCard extends LitElement {
# static styles = css`
# :host {
# display: block;
# padding: 16px;
# border-radius: 8px;
# background: white;
# box-shadow: 0 2px 8px rgba(0,0,0,0.1);
# }
# h3 { margin: 0 0 8px; color: #1a1a1a; }
# p { margin: 0; color: #666; }
# button {
# margin-top: 12px;
# padding: 8px 16px;
# border: none;
# border-radius: 4px;
# background: #4285f4;
# color: white;
# cursor: pointer;
# }
# `;
#
# @property() title = '';
# @property() description = '';
# @state() private _liked = false;
#
# render() {
# return html`
# 

# # 
# `;
# }
#
# private _toggle() {
# this._liked = !this._liked;
# this.dispatchEvent(new CustomEvent('liked', {
# detail: { liked: this._liked }
# }));
# }
# }

# Usage:
# 

# In React:
# import 'my-card';
# function App() {
# return ;
# }

from dataclasses import dataclass
from typing import List

@dataclass
class WebComponent:
 tag: str
 props: List[str]
 events: List[str]
 size_kb: float

components = [
 WebComponent("my-card", ["title", "description", "image"], ["liked", "shared"], 2.1),
 WebComponent("my-button", ["variant", "size", "disabled"], ["click"], 1.5),
 WebComponent("my-input", ["label", "value", "type", "error"], ["change", "input"], 2.8),
 WebComponent("my-modal", ["open", "title", "closable"], ["close", "confirm"], 3.2),
 WebComponent("my-tabs", ["active", "orientation"], ["tab-change"], 2.5),
]

print("Lit Element Component Library:")
total_size = 0
for c in components:
 total_size += c.size_kb
 print(f" <{c.tag}> ({c.size_kb}KB)")
 print(f" Props: {', '.join(c.props)}")
 print(f" Events: {', '.join(c.events)}")
print(f"\n Total Bundle: {total_size:.1f}KB (+ Lit core 5KB)")

Career Development Path

# career.py — IT Career Development Path
from dataclasses import dataclass, field
from typing import List, Dict

@dataclass
class CareerLevel:
 title: str
 years_exp: str
 salary_range: str
 skills: List[str]
 responsibilities: List[str]
 next_step: str

career_path = {
 "Junior Frontend": CareerLevel(
 "Junior Frontend Developer", "0-2 ปี", "20,000-35,000",
 ["HTML/CSS/JS", "React หรือ Vue", "Git", "Responsive Design"],
 ["เขียน UI ตาม Design", "แก้ Bug", "เขียน Unit Test"],
 "Mid-level Frontend",
 ),
 "Mid Frontend": CareerLevel(
 "Frontend Engineer", "2-5 ปี", "35,000-60,000",
 ["TypeScript", "State Management", "Testing", "Performance", "Web Components"],
 ["ออกแบบ Component", "Code Review", "Technical Decision", "CI/CD"],
 "Senior Frontend",
 ),
 "Senior Frontend": CareerLevel(
 "Senior Frontend Engineer", "5-8 ปี", "60,000-100,000",
 ["Architecture", "Design System", "Accessibility", "Security", "Mentoring"],
 ["ออกแบบ Architecture", "Mentor Junior", "Technical Leadership", "Cross-team Collaboration"],
 "Tech Lead หรือ Staff Engineer",
 ),
 "Tech Lead": CareerLevel(
 "Tech Lead / Engineering Manager", "8-12 ปี", "100,000-150,000",
 ["People Management", "Project Management", "System Design", "Business Understanding"],
 ["นำทีม 5-10 คน", "Hiring", "Performance Review", "Technical Strategy"],
 "Director of Engineering",
 ),
 "Staff Engineer": CareerLevel(
 "Staff / Principal Engineer", "8-15 ปี", "120,000-200,000+",
 ["Cross-org Architecture", "Technical Vision", "RFC/ADR", "Influence without Authority"],
 ["ออกแบบ Architecture ข้าม Team", "Technical Strategy", "แก้ปัญหาซับซ้อน", "Industry Thought Leadership"],
 "Distinguished Engineer",
 ),
}

print("=== IT Career Development Path ===\n")
for level, info in career_path.items():
 print(f" [{info.title}] ({info.years_exp})")
 print(f" Salary: {info.salary_range} บาท")
 print(f" Skills: {', '.join(info.skills[:3])}")
 print(f" Next: {info.next_step}\n")

# Skills Roadmap
roadmap = {
 "Year 1": ["HTML/CSS/JS", "React/Vue", "Git", "REST API", "Responsive"],
 "Year 2": ["TypeScript", "Testing (Jest)", "State Management", "CSS-in-JS"],
 "Year 3": ["Web Components (Lit)", "Performance", "Accessibility", "CI/CD"],
 "Year 4": ["System Design", "Design System", "GraphQL", "Micro-frontend"],
 "Year 5+": ["Architecture", "Technical Leadership", "Mentoring", "Open Source"],
}

print("=== Skills Roadmap ===")
for year, skills in roadmap.items():
 print(f" {year}: {', '.join(skills)}")

Portfolio และ Interview

# portfolio.py — Portfolio & Interview Preparation
portfolio_projects = {
 "Design System": {
 "desc": "สร้าง Component Library ด้วย Lit Element",
 "tech": "Lit, TypeScript, Storybook, npm publish",
 "impact": "แสดง Web Components + Open Source skills",
 },
 "Dashboard App": {
 "desc": "สร้าง Dashboard แสดงข้อมูล Real-time",
 "tech": "React/Vue, Chart.js, WebSocket, REST API",
 "impact": "แสดง Data Visualization + API Integration",
 },
 "E-commerce": {
 "desc": "สร้าง E-commerce ครบ Cart Checkout Payment",
 "tech": "Next.js, Stripe, Tailwind, Database",
 "impact": "แสดง Full-stack + Payment Integration",
 },
 "CLI Tool": {
 "desc": "สร้าง CLI Tool ที่มีประโยชน์",
 "tech": "Node.js, Commander, Chalk",
 "impact": "แสดง Problem Solving + Tooling skills",
 },
}

print("=== Portfolio Projects ===")
for project, info in portfolio_projects.items():
 print(f"\n [{project}]")
 for k, v in info.items():
 print(f" {k}: {v}")

# Interview Topics
interview_topics = {
 "Frontend": [
 "Virtual DOM vs Real DOM",
 "Web Components vs React Components",
 "CSS Specificity, Flexbox, Grid",
 "Event Loop, Promises, async/await",
 "Performance: Lazy Loading, Code Splitting",
 "Accessibility (WCAG, ARIA)",
 ],
 "System Design": [
 "Design a Component Library",
 "Design a Real-time Chat",
 "Micro-frontend Architecture",
 "CDN and Caching Strategy",
 ],
 "Behavioral": [
 "Tell me about a difficult bug you fixed",
 "How do you handle disagreements in code review",
 "How do you mentor junior developers",
 "Describe a project you're most proud of",
 ],
}

print(f"\n\n=== Interview Topics ===")
for category, topics in interview_topics.items():
 print(f"\n [{category}]")
 for topic in topics:
 print(f" - {topic}")

# Salary Negotiation
tips = [
 "รู้ Market Rate ก่อนเจรจา (Glassdoor, LinkedIn)",
 "เน้น Value ที่ให้ ไม่ใช่แค่ขอเงินเพิ่ม",
 "เตรียม Counter Offer อย่างน้อย 2 บริษัท",
 "เจรจา Total Compensation ไม่ใช่แค่เงินเดือน",
 "Stock Options, Bonus, WFH, Learning Budget",
 "อย่ารับ Offer แรก ขอเวลาคิด 2-3 วัน",
]

print(f"\n\n=== Salary Negotiation Tips ===")
for i, tip in enumerate(tips, 1):
 print(f" {i}. {tip}")

เคล็ดลับ

  • Lit: เล็ก เร็ว ใช้ Standard Web APIs ทำงานทุก Framework
  • Portfolio: สร้าง 3-4 โปรเจคที่หลากหลาย Publish บน GitHub
  • T-Shaped: เชี่ยวชาญ 1 ด้าน (Frontend) แต่รู้กว้าง (Backend, DevOps)
  • Community: เข้าร่วม Meetup เขียน Blog แชร์ความรู้
  • Remote: ฝึกภาษาอังกฤษ ทำงาน Remote บริษัทต่างประเทศ เงินเดือน 2-5x

Lit Element คืออะไร

Library สร้าง Web Components 5KB Google Standard Web APIs Template Literals Reactive Properties Shadow DOM ทุก Framework