Home > Tutorials > HTML5 > HTML5 Device Access > Geolocation API > watchPosition > Continuous Location Updates

Continuous Location Updates

HTML5

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HTML5 Media
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  - key
    
    Get Key by Index
  - length
    
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    5-10 MB
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    Open Database
  - transaction
    
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  - Deprecation
    
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HTML5 Device Access
- Geolocation API
  - getCurrentPosition
    
    Get User Location
  - watchPosition
    
    Continuous Location Updates
  - clearWatch
    
    Stop Watching
  - Position Object
    
    latitude longitude
  - Accuracy
    
    accuracy Property
  - Altitude
    
    altitude Property
  - Speed
    
    speed Property
  - Heading
    
    heading Property
  - Error Handling
    
    Permission Denied
  - Options
    
    enableHighAccuracy
    
    timeout
    
    maximumAge
  - User Permission
    
    Privacy Requirement
  - Reverse Geocoding
    
    Convert to Address
  - Map Integration
    
    Google Maps Leaflet
- Device Orientation
  - deviceorientation
    
    Alpha Beta Gamma
  - Alpha
    
    Compass Direction 0-360
  - Beta
    
    Front Back Tilt -180-180
  - Gamma
    
    Left Right Tilt -90-90
  - deviceorientationabsolute
    
    Absolute Orientation
  - Permission Required
    
    Sensor Permissions
  - Use Cases
    
    Parallax Effect
    
    Panorama Viewer
- Device Motion
  - devicemotion
    
    Acceleration Data
  - acceleration
    
    Acceleration X Y Z
  - accelerationIncludingGravity
    
    With Gravity
  - rotationRate
    
    Rotation Alpha Beta Gamma
  - interval
    
    Update Interval
  - Use Cases
    
    Step Counter
    
    Shake Detection
    
    Mobile Games
- Vibration API
  - navigator.vibrate
    
    Vibrate Device
  - Vibration Pattern
    
    Array Pattern
  - Cancel Vibration
    
    0 or Empty Array
  - Use Cases
    
    Games Haptics
    
    Notifications
- Battery Status API
  - navigator.getBattery
    
    Get Battery Info
  - charging
    
    Is Battery Charging
  - chargingTime
    
    Time to Full Charge
  - dischargingTime
    
    Time to Empty
  - level
    
    Battery Percentage 0-1
  - chargingchange Event
    
    Charging Status Change
  - levelchange Event
    
    Battery Level Change
  - Use Cases
    
    Power Saving Mode
- Network Information API
  - navigator.connection
    
    Network Info
  - effectiveType
    
    4g 3g 2g slow-2g
  - downlink
    
    Download Speed Mbps
  - rtt
    
    Round Trip Time ms
  - saveData
    
    Data Saving Mode
  - change Event
    
    Network Change
  - Use Cases
    
    Adaptive Loading
    
    Quality Adjustment
- Ambient Light Sensor
  - AmbientLightSensor
    
    Light Level Detection
  - illuminance
    
    Light Intensity
  - Use Cases
    
    Adaptive Brightness
- Proximity Sensor
  - Proximity Sensor
    
    Device Distance Detection
  - Use Cases
    
    Screen On Off
HTML5 Communication
- WebSocket API
  - WebSocket Connection
    
    new WebSocket
  - WebSocket Events
    
    onopen onmessage onclose onerror
  - send Method
    
    Send Data to Server
  - close Method
    
    Close Connection
  - readyState
    
    Connection State
  - bufferedAmount
    
    Unsent Data
  - binaryType
    
    Blob or ArrayBuffer
  - WebSocket vs HTTP
    
    Persistent Connection
  - Use Cases
    
    Chat Applications
    
    Real Time Games
    
    Live Updates
- Server Sent Events
  - EventSource
    
    Server to Client Stream
  - new EventSource
    
    Create Connection
  - onmessage
    
    Message Handler
  - Event Types
    
    Data Event
  - Custom Events
    
    Event Name Field
  - onerror
    
    Error Handler
  - close
    
    Close Connection
  - withCredentials
    
    Credentials Support
  - Use Cases
    
    Notifications
    
    Live Scores
    
    Stock Ticker
  - SSE vs WebSocket
    
    One Way vs Two Way
- WebRTC
  - RTCPeerConnection
    
    P2P Connection
  - getUserMedia
    
    Camera Microphone Access
  - getDisplayMedia
    
    Screen Sharing
  - createOffer
    
    Create SDP Offer
  - createAnswer
    
    Create SDP Answer
  - setLocalDescription
    
    Set Local SDP
  - setRemoteDescription
    
    Set Remote SDP
  - addIceCandidate
    
    Add ICE Candidate
  - onicecandidate
    
    ICE Candidate Event
  - ontrack
    
    Track Event
  - Data Channel
    
    P2P Data Transfer
  - Video Call
    
    Real Time Video
  - STUN Server
    
    NAT Traversal
  - TURN Server
    
    Fallback Relay
  - Signaling Server
    
    Setup Connection
  - Use Cases
    
    Video Conferencing
    
    P2P File Sharing
    
    Live Streaming
HTML5 Performance
- Web Workers
  - Dedicated Worker
    
    Single Page Worker
  - Shared Worker
    
    Multi Page Worker
  - Service Worker
    
    PWA Offline
  - new Worker
    
    Create Worker
  - postMessage
    
    Send Data to Worker
  - onmessage
    
    Receive Data from Worker
  - terminate
    
    Stop Worker
  - Worker Limitations
    
    No DOM Access
    
    No Window Object
    
    Limited API Access
  - Use Cases
    
    Heavy Calculations
    
    Image Processing
    
    Data Parsing
- Performance API
  - performance.now
    
    High Resolution Time
  - performance.mark
    
    Create Performance Mark
  - performance.measure
    
    Measure Between Marks
  - performance.getEntries
    
    Get Performance Entries
  - performance.clearMarks
    
    Clear Marks
  - performance.clearMeasures
    
    Clear Measures
  - performance.clearResourceTimings
    
    Clear Resources
- Resource Timing
  - PerformanceResourceTiming
    
    Resource Load Time
  - initiatorType
    
    Resource Type
  - startTime
    
    Start Time
  - responseEnd
    
    End Time
  - transferSize
    
    Transfer Size
- Navigation Timing
  - PerformanceNavigationTiming
    
    Page Load Metrics
  - domInteractive
    
    DOM Ready
  - domContentLoadedEventEnd
    
    DCL
  - loadEventEnd
    
    Page Fully Loaded
- User Timing
  - measure
    
    User Defined Metrics
  - mark
    
    Custom Markers
- Long Tasks API
  - PerformanceLongTaskTiming
    
    Long Task Detection
  - Task Duration
    
    Blocking Time
  - Use Cases
    
    Responsiveness Issues
- Page Visibility API
  - document.hidden
    
    Page Hidden Check
  - document.visibilityState
    
    Visible Hidden Prerender
  - visibilitychange Event
    
    Tab Switch Detection
  - Use Cases
    
    Pause Video on Tab Switch
    
    Stop Animations
- Resource Hints
  - Preload
    
    <link rel="preload">
  - Prefetch
    
    <link rel="prefetch">
  - Preconnect
    
    <link rel="preconnect">
  - DNS Prefetch
    
    <link rel="dns-prefetch">
  - Prerender
    
    <link rel="prerender">
  - as Attribute
    
    Resource Type
  - crossorigin
    
    CORS Support
  - type Attribute
    
    MIME Type
  - media Attribute
    
    Media Condition
- Lazy Loading
  - loading attribute
    
    lazy eager auto
  - Image Lazy Loading
    
    loading="lazy"
  - Iframe Lazy Loading
    
    loading="lazy"
  - Intersection Observer
    
    JS Implementation
  - Fallback
    
    Legacy Browser Support
- Fetch Priority
  - fetchpriority attribute
    
    high low auto
  - LCP Image Priority
    
    fetchpriority="high"
  - Fetch Priority Use
    
    Critical Resources
HTML5 Security
- Content Security Policy
  - CSP Header
    
    Content-Security-Policy
  - default-src
    
    Fallback Policy
  - script-src
    
    Script Sources
  - style-src
    
    Style Sources
  - img-src
    
    Image Sources
  - connect-src
    
    API Endpoints
  - font-src
    
    Font Sources
  - frame-src
    
    Frame Sources
  - report-uri
    
    Report Violations
  - Nonce
    
    Random Nonce for Inline
  - Hash
    
    Script Hash for Inline
  - Strict Dynamic
    
    Trust Propagation
  - Sandbox
    
    Restrict Capabilities
- CORS
  - Cross Origin Resource Sharing
    
    CORS Header
  - Access-Control-Allow-Origin
    
    Allowed Origins
  - Access-Control-Allow-Methods
    
    Allowed Methods
  - Access-Control-Allow-Headers
    
    Allowed Headers
  - Access-Control-Allow-Credentials
    
    Cookies Support
  - Preflight Request
    
    OPTIONS Method
  - Simple Requests
    
    Allowed Without Preflight
  - CORS Errors
    
    Debugging CORS Issues
- Cross Origin Isolation
  - COOP
    
    Cross Origin Opener Policy
  - COEP
    
    Cross Origin Embedder Policy
  - CORP
    
    Cross Origin Resource Policy
  - SharedArrayBuffer
    
    Requires Isolation
- Iframe Security
  - sandbox Attribute
    
    Restrict Iframe
  - allow Attribute
    
    Feature Permissions
  - allow-scripts
    
    Allow JavaScript
  - allow-same-origin
    
    Same Origin Access
  - allow-forms
    
    Allow Form Submission
  - allow-popups
    
    Allow Popups
  - allow-top-navigation
    
    Top Navigation
  - csp Attribute
    
    Iframe CSP
  - referrerpolicy
    
    Referrer Control
HTML5 Web Components
- Custom Elements
  - define Method
    
    Register Custom Element
  - HTMLElement
    
    Extend HTMLElement
  - Lifecycle Callbacks
    
    connectedCallback disconnectedCallback
  - Attribute Observation
    
    observedAttributes
  - attributeChangedCallback
    
    Attribute Change Handler
  - adoptedCallback
    
    DOM Adoption Handler
  - Customized Built-in Elements
    
    Extend Native Elements
  - Naming Rules
    
    Must Contain Hyphen
  - is Attribute
    
    Is for Built-in
- Shadow DOM
  - attachShadow
    
    Create Shadow Root
  - mode
    
    open vs closed
  - Shadow Host
    
    Parent Element
  - Shadow Root
    
    Root of Shadow Tree
  - Slot Element
    
    Content Projection
  - Named Slots
    
    slot="name"
  - Default Slot
    
    Unnamed Slot
  - Slotted Pseudo Element
    
    ::slotted()
  - Part Attribute
    
    Style from Outside
  - ::part() Pseudo Class
    
    Target Part
- HTML Templates
  - <template> Tag
    
    Inert HTML Content
  - cloneNode
    
    Clone Template Content
  - importNode
    
    Import Node
  - Content Property
    
    Document Fragment
- HTML Slots
  - slot Element
    
    Content Insertion Point
  - slotchange Event
    
    Slot Content Change
  - assignedNodes
    
    Get Assigned Nodes
- Element Internals
  - attachInternals
    
    Attach Internal API
  - setFormValue
    
    Form Integration
  - setValidity
    
    Custom Validation
  - Form Associated
    
    Form Participation
  - ARIA Reflection
    
    Accessibility Properties
- Examples
  - Custom Button
    
    Simple Custom Button
  - Custom Card
    
    Reusable Card Component
  - Custom Tooltip
    
    Tooltip on Hover
  - Custom Rating
    
    Star Rating Component
  - Custom Tabs
    
    Tabs Component
  - Custom Modal
    
    Modal Dialog Component
HTML5 Microdata
- Microdata Introduction
  - Semantic Annotation
    
    Rich Snippets
- Microdata Attributes
  - itemscope
    
    Define Item
  - itemtype
    
    Schema URL
  - itemprop
    
    Property Name
  - itemid
    
    Item Identifier
  - itemref
    
    Reference External
- Schemas
  - Person Schema
    
    Name Job Works For
  - Product Schema
    
    Name Price Description
  - Event Schema
    
    Name Date Location
  - Organization Schema
    
    Name Logo Contact
  - Recipe Schema
    
    Name Ingredients Instructions
  - Review Schema
    
    Item Rating Author
- JSON-LD
  - JSON-LD Format
    
    <script type="application/ld+json">
  - @context
    
    Schema.org URL
  - @type
    
    Schema Type
  - @id
    
    Item ID
  - Benefits
    
    Easy to Implement
- RDFa
  - RDFa Attributes
    
    Alternative to Microdata
  - vocab
    
    Prefix
- Open Graph
  - og:title
    
    Social Media Title
  - og:description
    
    Social Description
  - og:image
    
    Social Thumbnail
  - og:url
    
    Canonical URL
  - og:type
    
    Page Type
- Twitter Cards
  - twitter:card
    
    Card Type
  - twitter:site
    
    Twitter Handle
  - twitter:creator
    
    Author Handle
HTML5 Drag and Drop
- Drag and Drop API
  - draggable Attribute
    
    Make Element Draggable
  - Drag Events
    
    dragstart drag dragend
  - Drop Events
    
    dragenter dragover dragleave drop
  - setData
    
    Store Drag Data
  - getData
    
    Retrieve Drag Data
  - dataTransfer
    
    Data Transfer Object
  - effectAllowed
    
    Copy Move Link
  - dropEffect
    
    Drop Effect
  - setDragImage
    
    Custom Drag Image
  - File Drag and Drop
    
    Drop Files from Desktop
  - Use Cases
    
    Drag Drop Upload
    
    Task Board
HTML5 History API
- History API
  - pushState
    
    Add History Entry
  - replaceState
    
    Replace Current Entry
  - popstate Event
    
    Back Forward Button
  - state
    
    Get State Object
  - back
    
    Go Back
  - forward
    
    Go Forward
  - go
    
    Go to Specific Entry
  - SPA Routing
    
    Single Page App Navigation
  - Use Cases
    
    AJAX Navigation
HTML5 Web Storage
- Local Storage
  - localStorage
    
    Persistent Storage
  - sessionStorage
    
    Temporary Storage
- Web Storage API
  - setItem
    
    Store Item
  - getItem
    
    Get Item
  - removeItem
    
    Remove Item
  - clear
    
    Clear All
  - key
    
    Get Key by Index
  - length
    
    Storage Length
  - Storage Event
    
    Cross Tab Sync
  - JSON Storage
    
    Objects Storage
  - Storage Limit
    
    5-10 MB
HTML5 Conclusion
- HTML5 Summary
  - Complete Coverage
    
    All HTML5 Features
  - Browser Support
    
    Modern Browsers
  - Resources
    
    MDN CanIUse HTML5 Please
  - Next Steps
    
    Learn CSS3 ES6 PWA