Getting Started with DOM
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Talk's slide "Getting Started with DOM" given at MercadoLibre.
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Getting Started with DOM
- 1. Getting Started with DOM
- 2. writing HTML documents 1. you encapsulate HTML inside other HTML 2. you set up a hierarchy 3. it is indicated visually by indenting 4. it can be expressed as a tree
- 3. browser’s job 1. when loads the HTML interrupts the process 2. to simulate the markup encapsulation 3. parsing this hierarchy to create a tree of objects
- 4. Contents 1. Node Types 2. Interfaces 3. Inheritance 4. Element Node 5. Text Node 6. Events 7. Document Fragment
- 5. 1.Node Type 9 1 2 3 11 10 document.DOCUMENT_NODE document.ELEMENT_NODE document.ATTRIBUTE_NODE document.TEXT_NODE document.DOCUMENT_FRAGMENT_NODE document.DOCUMENT_TYPE_NODE
- 6. 1. Node Type document.DOCUMENT_NODE === 9 <!doctype html>! <html>! !<head>! !! <tittle></tittle>! !</head>! !<body class=“widget”>! !! Hello World!! !</body>! </html>
- 7. 1. Node Type document.DOCUMENT_NODE === 9 document
- 8. 1. Node Type document.ELEMENT_NODE === 1 <!doctype html>! <html>! !<head>! !! <tittle></tittle>! !</head>! !<body class=“widget”>! !! Hello World!! !</body>! </html>
- 9. 1. Node Type document.ELEMENT_NODE === 1 document.body
- 10. 1. Node Type document.ATTRIBUTE_NODE === 2 <!doctype html>! <html>! !<head>! !! <tittle></tittle>! !</head>! !<body class=“widget”>! !! Hello World!! !</body>! </html>
- 11. 1. Node Type document.ATTRIBUTE_NODE === 2 document.createAttribute(‘class’);
- 12. 1. Node Type document.TEXT_NODE === 3 <!doctype html>! <html>! !<head>! !! <tittle></tittle>! !</head>! !<body class=“widget”>! !! Hello World!! !</body>! </html>
- 13. 1. Node Type document.TEXT_NODE === 3 document.createTextNode(‘Hello World!’);
- 14. 1. Node Type document.DOCUMENT_TYPE_NODE === 10 <!doctype html>! <html>! !<head>! !! <tittle></tittle>! !</head>! !<body class=“widget”>! !! Hello World!! !</body>! </html>
- 15. 1. Node Type document.DOCUMENT_TYPE_NODE === 10 document.doctype
- 16. 1. Node Type document.DOCUMENT_FRAGMENT_NODE === 11 <!doctype html>! <html>! !<head>! !! <tittle></tittle>! !</head>! !<body class=“widget”>! !! Hello World!! !</body>! </html>
- 17. 1. Node Type document.DOCUMENT_FRAGMENT_NODE === 11 document.createDocumentFragment()
- 18. 2. Interfaces
- 19. 2. Interfaces p instanceof HTMLParagraphElement HTMLHtmlElement! HTMLHeadElement! HTMLLinkElement! HTMLTitleElement! HTMLStyleElement! HTMLBodyElement! HTMLFormElement
- 20. 3. Inheritance
- 21. 3. Inheritance document Node HTMLElement
- 22. 4. Element Node
- 23. 4. Element Node Node properties dataset! attributes! tagName! children
- 24. 4. Element Node Node methods createElement()! getAttribute()! setAttribute()! hasAttribute()! removeAttribute()! classList()
- 25. 4. Element Node Working with string innerHTML! innerText! outerHTML! textContent! insertAdjacentHTML()
- 26. 4. Element Node Working with nodes appendChild()! removeChild()! replaceChild()! insertBefore()! cloneNode()
- 27. 4. Element Node Node selection single element multiple elements preconfigured collections
- 28. 4. Element Node Node selection single element multiple elements preconfigured collections querySelector()! getElementById()
- 29. 4. Element Node Node selection single element multiple elements preconfigured collections querySelector()! getElementById() querySelectorAll()! getElementsByTagName()! getElementsByClassName()
- 30. 4. Element Node Node selection single element multiple elements preconfigured collections querySelector()! getElementById() querySelectorAll()! getElementsByTagName()! getElementsByClassName() document.all! document.forms! document.links! document.images
- 31. 4. Element Node Collections types Live Static
- 32. 4. Element Node Collection type: Live Live Static getElementsByTagName()! getElementsByClassName()! document.all! document.links! document.images! querySelector().childNodes! !
- 33. 4. Element Node Collection type: Static Live Static getElementsByTagName()! getElementsByClassName()! document.all! document.links! document.images! querySelector().childNodes! ! querySelectorAll()
- 34. 4. Element Node Collections types HTMLCollection NodeList StyleSheetList querySelector().children! ! querySelector().childNodes! ! document.styleSheets
- 35. 4. Element Node Width without borders querySelector().clientWidth
- 36. 4. Element Node Width with borders querySelector().getBoudingClientRect().width
- 37. 4. Element Node First parent positioned querySelector().offsetParent
- 38. 4. Element Node Top to the offsetParent querySelector().offsetTop
- 39. 4. Element Node Left to the offsetParent querySelector().offsetLeft
- 40. 4. Element Node Real height querySelector().scrollHeight
- 41. 4. Element Node Scrolled top difference querySelector().scrollTop
- 42. 4. Element Node Real width querySelector().scrollWidth
- 43. 4. Element Node Scrolled left difference querySelector().scrollLeft
- 44. 5. Text Node
- 45. 5. Text Node Node properties data! textContent! nodeValue
- 46. splitText()! normalize()! appendData(‘!’)! deleteData(3,5)! insertData(2,’Text’)! replaceData(1,2,’Text’)! substringData(2,3) 5. Text Node Node methods
- 47. 5. Text Node Text nodes <p>This is <code>TEXT_NODE</code>.</p>
- 48. 6. Events It is a predefined or a custom moment in time that occurs in relationship to an element in the DOM, de document object or the window object.
- 49. 6. Events Setting Events 1. Inline Event Handler 2. Property Event Handler 3. addEventListener() method
- 50. DOM Event Types Event! UIEvent! MouseEvent! FocusEvent! WheelEvent! TouchEvent! HashChangeEvent! NavigatorOnLine! PageTransitionEvent! DragEvent 6. Events
- 51. 6. Events Event type readystatechange! DOMContentLoaded
- 52. 6. Events UIEvent type load! abort! unload! error! resize! scroll
- 53. MouseEvent type contextMenu! click! dbclick! mousedown! mouseenter! mouseleave! mousemove! mouseout! mouseup! mouseover 6. Events
- 54. 6. Events FocusEvent type blur! focus! focusin! focusout
- 55. 6. Events Form Events type change! reset! submit! select
- 56. 6. Events WheelEvent type wheel/mousewheel
- 57. 6. Events KeyboardEvent type keydown! keypress! keyup
- 58. 6. Events TouchEvent type touchstart! touchend! touchmove! touchenter! touchleave! touchcancel
- 59. 6. Events HashChangeEvent type hashchange
- 60. 6. Events NavigatorOnLine type online! offline
- 61. 6. Events PageTransitionEvent type pagehide! pageshow
- 62. DragEvent type drag! dragstart! dragend! dragenter! dragleave! dragover! drop 6. Events
- 63. 6. Events The Event Flow is composed by two phases ! 1. Capture Event Phase 2. Propagation/Bubbling Event Phase
- 64. 6. Events Capture Event Phase
- 65. 6. Events Capture Event Phase window.addEventListener(…,…,true) document.addEventListener(…,…,true) document.body.addEventListener(…,…,true) document.querySelector(‘div’).addEventListener(…,…,true)
- 66. 6. Events Capture Event Phase
- 67. 6. Events Capture Event Phase window.addEventListener(…,…,true)
- 68. 6. Events Capture Event Phase window.addEventListener(…,…,true) document.addEventListener(…,…,true)
- 69. 6. Events Capture Event Phase window.addEventListener(…,…,true) document.addEventListener(…,…,true) document.body.addEventListener(…,…,true)
- 70. 6. Events Capture Event Phase window.addEventListener(…,…,true) document.addEventListener(…,…,true) document.body.addEventListener(…,…,true) document.querySelector(‘div’).addEventListener(…,…,true)
- 71. 6. Events Propagation Event Phase
- 72. 6. Events Propagation Event Phase document.querySelector(‘div’).addEventListener(…,…,false) document.body.addEventListener(…,…,false) document.addEventListener(…,…,false) window.addEventListener(…,…,false)
- 73. 6. Events Propagation Event Phase document.querySelector(‘div’).addEventListener(…,…,false)
- 74. 6. Events Propagation Event Phase document.querySelector(‘div’).addEventListener(…,…,false) document.body.addEventListener(…,…,false)
- 75. 6. Events Propagation Event Phase document.querySelector(‘div’).addEventListener(…,…,false) document.body.addEventListener(…,…,false) document.addEventListener(…,…,false)
- 76. 6. Events Propagation Event Phase document.querySelector(‘div’).addEventListener(…,…,false) document.body.addEventListener(…,…,false) document.addEventListener(…,…,false) window.addEventListener(…,…,false)
- 77. 7. Document Fragment It is a empty document template It acts just like the live DOM tree It only lives in memory It can’t contain <body> and <html> node It’s not added to the DOM when a fragment is appended
- 78. 7. Document Fragment innerHTML hack var div = document.createElement(‘div’);! var frag = document.createDocumentFragment();! div.innerHTML = ‘<p>It is <strong>better</strong>.</p>’;! ! frag.appendChild(div);! document.body.appendChild(frag);
- 79. The end!