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? ? ????? JS ???? JavaScript HTML DOM ???: ?? ? ??? ???? ??

JavaScript HTML DOM ???: ?? ? ??? ???? ??

Dec 20, 2024 am 02:57 AM

Mastering the JavaScript HTML DOM: Building Dynamic and Interactive Webpages

JavaScript HTML DOM: ?? ???

?? ?? ??(DOM)? ? ??? ????? ????????. ?? ????? ??? ?? ??? ????? ???? JavaScript? ???? HTML ? CSS? ??? ? ????. DOM? ????? ??? ??? ????? ?? ? ????.

DOM?? ??????

DOM? HTML ??? ????? ??? ????. ?? ?? JavaScript? ????? ??, ?? ? ???? ???? ????? ??? ? ????.

?:

? HTML? ??:

<!DOCTYPE html>
<html>
  <head>
    <title>DOM Example</title>
  </head>
  <body>
    <h1>



<p>The DOM represents it as:<br>
</p>

<pre class="brush:php;toolbar:false">- Document
  - html
    - head
      - title
    - body
      - h1
      - p

DOM ???

JavaScript? DOM ??? ???? ???? ??? ?????.

???? ?? ??

  1. getElementById ID? ??? ?????. 
   const title = document.getElementById("title");
   console.log(title.innerText); // Output: Hello, DOM!
  1. getElementsByClassName ??? ???? ??? ?????(??? ??). 
   const paragraphs = document.getElementsByClassName("description");
   console.log(paragraphs[0].innerText);
  1. getElementsByTagName ?? ??(?: div, p)?? ??? ?????. 
   const headings = document.getElementsByTagName("h1");
   console.log(headings[0].innerText);
  1. ????? CSS ???? ???? ? ?? ??? ?????. 
   const title = document.querySelector("#title");
  1. querySelectorAll CSS ???? ???? ?? ??? ???????(NodeList ??). 
   const paragraphs = document.querySelectorAll(".description");

DOM ??

??? ??? ??, ?? ? ???? ???? ??? ? ????.

1. ??? ??

  • innerHTML: HTML ???? ????? ?????. 
  document.getElementById("title").innerHTML = "Welcome to the DOM!";
  • innerText ?? textContent: ?? ???? ????? ?????. 
  document.getElementById("title").innerText = "Hello, World!";

2. ?? ??

  • ?? ??? ????? setAttribute ? getAttribute? ?????. 
  const link = document.querySelector("a");
  link.setAttribute("href", "https://example.com");
  • id, className, src? ?? ??? ?? ?????. 
  const image = document.querySelector("img");
  image.src = "image.jpg";

3. ??? ???

CSS ??? ?? ?????.

<!DOCTYPE html>
<html>
  <head>
    <title>DOM Example</title>
  </head>
  <body>
    <h1>



<p>The DOM represents it as:<br>
</p>

<pre class="brush:php;toolbar:false">- Document
  - html
    - head
      - title
    - body
      - h1
      - p

?? ?? ? ??

1. ?? ??

  • createElement: ? ??? ?????.
  • appendChild: ?? ??? ??? ?????. 
   const title = document.getElementById("title");
   console.log(title.innerText); // Output: Hello, DOM!

2. ?? ??

  • removeChild: ?? ??? ?????. 
   const paragraphs = document.getElementsByClassName("description");
   console.log(paragraphs[0].innerText);

DOM??? ??? ??

???? ???? ? ???? ?? ?????? ??? ???? ?????.

??? ??? ??

addEventListener? ???? ???? ??? ??????.

   const headings = document.getElementsByTagName("h1");
   console.log(headings[0].innerText);

????

  1. ??? ???: ??, dblclick, ?????, ?????
  2. ??? ???: keydown, keyup
  3. ?? ???: ??, ??, ??

DOM ??

DOM ??? ??? ???? ?? ?? ??? ? ????.

??? ??

  • parentNode: ?? ??? ?????.
  • childNodes: ?? ?? ??? ?????.
  • children: ?? ?? ??? ?????. 
   const title = document.querySelector("#title");

??

  • nextSibling: ?? ?? ??? ?????.
  • previousSibling: ?? ?? ??? ?????.

?? DOM ??

1. ?? ??

cloneNode? ???? ??? ???? ????.

   const paragraphs = document.querySelectorAll(".description");

2. ??? ??

???? ????? classList ??? ?????.

  document.getElementById("title").innerHTML = "Welcome to the DOM!";

3. ??? ??

HTML ???? ??? ??? ???? ?????.

  document.getElementById("title").innerText = "Hello, World!";

DOM ?? ?? ??

  1. ???? ? ?? ??? ???:

    • ??? ???? ???? ?? DOM ??? ?? ?????.
    • ?? ?????? documentFragment? ?????.

  2. ??? ?? ??:

    ?? ?? ?? ?? ?? ??? ???? ?????.

<!DOCTYPE html>
<html>
  <head>
    <title>DOM Example</title>
  </head>
  <body>
    <h1>



<p>The DOM represents it as:<br>
</p>

<pre class="brush:php;toolbar:false">- Document
  - html
    - head
      - title
    - body
      - h1
      - p
  1. ??? JavaScript? ????: ??? ???? ????? ?? ????? addEventListener? ?????.

??

JavaScript HTML DOM? ??? ??? ? ???? ??? ?? ??? ?????. ???? DOM ??, ??? ?? ? ?? ??? ???? ???? ??? ??? ????? ???? ???? ??? ???? ??????? ??? ? ????.

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?? ?????? ??? ?? ??? ?? ?? ??? ?? ??? ??????. ?? ????? ?? ???? ??? ???? ??????? ???? ?? ??? ????? ?? ? ?????? ???? ?????.
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? ??? JavaScript HTML DOM ???: ?? ? ??? ???? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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