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  1. Web technology for developers
  2. Web APIs
  3. Window
  4. Window.length
  • Change language

Table of contents

  • Syntax
  • Example
  • Specifications
  • Browser compatibility

Window.length

Returns the number of frames (either <frame> or <iframe> elements) in the window.

Syntax

framesCount = window.length;
  • framesCount is the number of frames.

Example

if (window.length) {
  // this is a document with subframes
}

Specifications

Specification
HTML Standard (HTML)
# dom-length-dev

Browser compatibility

BCD tables only load in the browser

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Last modified: Sep 14, 2021, by MDN contributors

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Related Topics

  1. Window
  2. Properties
    1. applicationCache
    2. closed
    3. console
    4. customElements
    5. defaultStatus
    6. devicePixelRatio
    7. dialogArguments
    8. document
    9. event
    10. frameElement
    11. frames
    12. fullScreen
    13. history
    14. innerHeight
    15. innerWidth
    16. length
    17. localStorage
    18. location
    19. locationbar
    20. menubar
    21. mozInnerScreenX
    22. mozInnerScreenY
    23. mozPaintCount
    24. name
    25. navigator
    26. onappinstalled
    27. onbeforeinstallprompt
    28. ondevicemotion
    29. ondeviceorientation
    30. ondeviceorientationabsolute
    31. ondragdrop
    32. ongamepadconnected
    33. ongamepaddisconnected
    34. onvrdisplayactivate
    35. onvrdisplayblur
    36. onvrdisplayconnect
    37. onvrdisplaydeactivate
    38. onvrdisplaydisconnect
    39. onvrdisplayfocus
    40. onvrdisplaypointerrestricted
    41. onvrdisplaypointerunrestricted
    42. onvrdisplaypresentchange
    43. opener
    44. outerHeight
    45. outerWidth
    46. pageXOffset
    47. pageYOffset
    48. parent
    49. personalbar
    50. screen
    51. screenLeft
    52. screenTop
    53. screenX
    54. screenY
    55. scrollbars
    56. scrollMaxX
    57. scrollMaxY
    58. scrollX
    59. scrollY
    60. self
    61. sessionStorage
    62. sidebar
    63. speechSynthesis
    64. status
    65. statusbar
    66. toolbar
    67. top
    68. visualViewport
    69. window
  3. Methods
    1. alert()
    2. back()
    3. blur()
    4. cancelAnimationFrame()
    5. cancelIdleCallback()
    6. captureEvents()
    7. clearImmediate()
    8. close()
    9. confirm()
    10. convertPointFromNodeToPage()
    11. convertPointFromPageToNode
    12. dump()
    13. find()
    14. focus()
    15. forward()
    16. getComputedStyle()
    17. getDefaultComputedStyle()
    18. getSelection()
    19. matchMedia()
    20. moveBy()
    21. moveTo()
    22. open()
    23. openDialog()
    24. postMessage()
    25. print()
    26. prompt()
    27. releaseEvents()
    28. requestAnimationFrame()
    29. requestFileSystem()
    30. requestIdleCallback()
    31. resizeBy()
    32. resizeTo()
    33. scroll()
    34. scrollBy()
    35. scrollByLines()
    36. scrollByPages()
    37. scrollTo()
    38. setImmediate()
    39. showDirectoryPicker()
    40. showModalDialog()
    41. showOpenFilePicker()
    42. showSaveFilePicker()
    43. sizeToContent()
    44. stop()
    45. updateCommands()
  4. Events
    1. event
    2. afterprint
    3. animationcancel
    4. animationend
    5. animationiteration
    6. beforeprint
    7. beforeunload
    8. blur
    9. copy
    10. cut
    11. DOMContentLoaded
    12. error
    13. focus
    14. hashchange
    15. languagechange
    16. load
    17. message
    18. messageerror
    19. offline
    20. online
    21. orientationchange
    22. pagehide
    23. pageshow
    24. paste
    25. popstate
    26. rejectionhandled
    27. storage
    28. transitioncancel
    29. unhandledrejection
    30. unload
    31. vrdisplayconnect
    32. vrdisplaydisconnect
    33. vrdisplaypresentchange
  5. Inheritance:
    1. EventTarget
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