The DOM represents it as:
\n<\/p>\n\n
- Document\n - html\n - head\n - title\n - body\n - h1\n - p\n<\/pre>\n\n\n\n\n
\n\n\n \n \n 訪問 DOM<\/strong>\n<\/h3>\n\n
JavaScript 提供了選擇和操作 DOM 元素的方法。 <\/p>\n\n
\n \n \n 常見的選擇方法<\/strong>\n<\/h4>\n\n
\n
- \ngetElementById<\/strong>\n通過 ID 選擇元素。\n<\/li>\n<\/ol>\n\n
const title = document.getElementById(\"title\");\n console.log(title.innerText); \/\/ Output: Hello, DOM!\n<\/pre>\n\n\n\n\n
- \ngetElementsByClassName<\/strong>\n按類名選擇元素（返回集合）。\n<\/li>\n<\/ol>\n\n
const paragraphs = document.getElementsByClassName(\"description\");\n console.log(paragraphs[0].innerText);\n<\/pre>\n\n\n\n\n
- \ngetElementsByTagName<\/strong>\n按標(biāo)簽名稱選擇元素（例如 div、p）。\n<\/li>\n<\/ol>\n\n
const headings = document.getElementsByTagName(\"h1\");\n console.log(headings[0].innerText);\n<\/pre>\n\n\n\n\n
- \n查詢選擇器<\/strong>\n選擇與 CSS 選擇器匹配的第一個(gè)元素。\n<\/li>\n<\/ol>\n\n
const title = document.querySelector(\"#title\");\n<\/pre>\n\n\n\n\n
- \nquerySelectorAll<\/strong>\n選擇與 CSS 選擇器匹配的所有元素（返回 NodeList）。\n<\/li>\n<\/ol>\n\n
const paragraphs = document.querySelectorAll(\".description\");\n<\/pre>\n\n\n\n\n
\n\n\n \n \n DOM 操作<\/strong>\n<\/h3>\n\n
選擇后，您可以動(dòng)態(tài)修改元素、屬性和內(nèi)容。<\/p>\n\n
\n \n \n 1.更改內(nèi)容<\/strong>\n<\/h4>\n\n<\/pre>\n
\n
- \ninnerHTML<\/strong>：設(shè)置或獲取 HTML 內(nèi)容。\n<\/li>\n<\/ul>\n\n
document.getElementById(\"title\").innerHTML = \"Welcome to the DOM!\";\n<\/pre>\n\n\n\n\n
- \ninnerText<\/strong> 或 textContent<\/strong>：設(shè)置或獲取純文本。\n<\/li>\n<\/ul>\n\n
document.getElementById(\"title\").innerText = \"Hello, World!\";\n<\/pre>\n\n\n\n\n \n \n 2.更改屬性<\/strong>\n<\/h4>\n\n
\n
- 使用setAttribute和getAttribute修改元素屬性。\n<\/li>\n<\/ul>\n\n
const link = document.querySelector(\"a\");\n link.setAttribute(\"href\", \"https:\/\/example.com\");\n<\/pre>\n\n\n\n\n
- 直接修改 id、className 或 src 等屬性。\n<\/li>\n<\/ul>\n\n
const image = document.querySelector(\"img\");\n image.src = \"image.jpg\";\n<\/pre>\n\n\n\n\n \n \n 3.改變風(fēng)格<\/strong>\n<\/h4>\n\n
直接修改 CSS 屬性。
\n<\/p>\n\n\n \nDOM Example<\/title>\n <\/head>\n <body> <h1><a href="http://www.miracleart.cn/">国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂</a></h1>\n <h1>\n\n\n\n<p>The DOM represents it as:<br>\n<\/p>\n\n<pre>- Document\n - html\n - head\n - title\n - body\n - h1\n - p\n<\/pre>\n\n\n\n\n<hr>\n\n<h3>\n \n \n <strong>添加和刪除元素<\/strong>\n<\/h3>\n\n<h4>\n \n \n <strong>1.添加元素<\/strong>\n<\/h4>\n\n<\/pre>\n<ul>\n<li>\n<strong>createElement<\/strong>：創(chuàng)建一個(gè)新元素。\n<\/li>\n<li>\n<strong>appendChild<\/strong>：將元素追加到父元素。\n<\/li>\n<\/ul>\n\n<pre> const title = document.getElementById(\"title\");\n console.log(title.innerText); \/\/ Output: Hello, DOM!\n<\/pre>\n\n\n\n<h4>\n \n \n <strong>2.刪除元素<\/strong>\n<\/h4>\n\n<ul>\n<li>\n<strong>removeChild<\/strong>：刪除子元素。\n<\/li>\n<\/ul>\n\n<pre> const paragraphs = document.getElementsByClassName(\"description\");\n console.log(paragraphs[0].innerText);\n<\/pre>\n\n\n\n\n<hr>\n\n<h3>\n \n \n <strong>DOM 中的事件處理<\/strong>\n<\/h3>\n\n<p>事件是瀏覽器檢測(cè)到的操作或事件，例如單擊或按鍵。 <\/p>\n\n<h4>\n \n \n <strong>添加事件監(jiān)聽器<\/strong>\n<\/h4>\n\n<p>使用 addEventListener 將事件綁定到元素。<br>\n<\/p>\n\n<pre> const headings = document.getElementsByTagName(\"h1\");\n console.log(headings[0].innerText);\n<\/pre>\n\n\n\n<h4>\n \n \n <strong>常見事件<\/strong>\n<\/h4>\n\n<ol>\n<li>\n<strong>鼠標(biāo)事件<\/strong>：?jiǎn)螕?、雙擊、鼠標(biāo)懸停、鼠標(biāo)移出\n<\/li>\n<li>\n<strong>鍵盤事件<\/strong>：keydown、keyup\n<\/li>\n<li>\n<strong>表單事件<\/strong>：提交、更改、聚焦\n<\/li>\n<\/ol>\n\n\n<hr>\n\n<h3>\n \n \n <strong>遍歷 DOM<\/strong>\n<\/h3>\n\n<p>您可以使用 DOM 樹中的關(guān)系在元素之間導(dǎo)航。<\/p>\n\n<h4>\n \n \n <strong>家長(zhǎng)和孩子<\/strong>\n<\/h4>\n\n<ul>\n<li>\n<strong>parentNode<\/strong>：獲取父節(jié)點(diǎn)。\n<\/li>\n<li>\n<strong>childNodes<\/strong>：列出所有子節(jié)點(diǎn)。\n<\/li>\n<li>\n<strong>children<\/strong>：列出所有子元素。\n<\/li>\n<\/ul>\n\n<pre> const title = document.querySelector(\"#title\");\n<\/pre>\n\n\n\n<h4>\n \n \n <strong>兄弟姐妹<\/strong>\n<\/h4>\n\n<ul>\n<li>\n<strong>nextSibling<\/strong>：獲取下一個(gè)兄弟節(jié)點(diǎn)。\n<\/li>\n<li>\n<strong>previousSibling<\/strong>：獲取上一個(gè)兄弟節(jié)點(diǎn)。\n<\/li>\n<\/ul>\n\n\n<hr>\n\n<h3>\n \n \n <strong>高級(jí) DOM 功能<\/strong>\n<\/h3>\n\n<h4>\n \n \n <strong>1.克隆元素<\/strong>\n<\/h4>\n\n<p>使用cloneNode創(chuàng)建元素的副本。<br>\n<\/p>\n\n<pre> const paragraphs = document.querySelectorAll(\".description\");\n<\/pre>\n\n\n\n<h4>\n \n \n <strong>2.使用類<\/strong>\n<\/h4>\n\n<p>使用 classList 屬性來操作類。<br>\n<\/p>\n\n<pre> document.getElementById(\"title\").innerHTML = \"Welcome to the DOM!\";\n<\/pre>\n\n\n\n<h4>\n \n \n <strong>3.使用模板<\/strong>\n<\/h4>\n\n<p>HTML 模板允許重復(fù)使用內(nèi)容。<br>\n<\/p>\n\n<pre> document.getElementById(\"title\").innerText = \"Hello, World!\";\n<\/pre>\n\n\n\n\n<hr>\n\n<h3>\n \n \n <strong>DOM 操作的最佳實(shí)踐<\/strong>\n<\/h3>\n\n<ol>\n<li>\n<p><strong>最小化回流和重繪<\/strong>：<\/p>\n\n<ul>\n<li>批量 DOM 更改以避免過度渲染。\n<\/li>\n<li>使用 documentFragment 進(jìn)行多次更新。\n<\/li>\n<\/ul>\n<\/li>\n<li><p><strong>使用事件委托<\/strong>:<br><br>\n將事件附加到父元素而不是單個(gè)子元素。<br>\n<\/p><\/li>\n<\/ol>\n\n<pre><!DOCTYPE html>\n<html>\n <head>\n <title>DOM Example<\/title>\n <\/head>\n <body>\n <h1>\n\n\n\n<p>The DOM represents it as:<br>\n<\/p>\n\n<pre>- Document\n - html\n - head\n - title\n - body\n - h1\n - p\n<\/pre>\n\n\n\n<ol>\n<li>\n<strong>避免內(nèi)聯(lián) JavaScript<\/strong>：\n使用外部腳本或 addEventListener 來干凈地分離代碼。<\/li>\n<\/ol>\n\n\n<hr>\n\n<h3>\n \n \n <strong>結(jié)論<\/strong>\n<\/h3>\n\n<p>JavaScript HTML DOM 是創(chuàng)建動(dòng)態(tài)和交互式網(wǎng)頁(yè)的強(qiáng)大工具。通過掌握 DOM 操作、事件處理和最佳實(shí)踐，開發(fā)人員可以構(gòu)建響應(yīng)迅速且用戶友好的應(yīng)用程序，從而增強(qiáng)整體用戶體驗(yàn)。<\/p>\n\n<p><strong>嗨，我是 Abhay Singh Kathayat！<\/strong><br>\n我是一名全棧開發(fā)人員，精通前端和后端技術(shù)。我使用各種編程語(yǔ)言和框架來構(gòu)建高效、可擴(kuò)展且用戶友好的應(yīng)用程序。<br>\n請(qǐng)隨時(shí)通過我的商務(wù)電子郵件與我聯(lián)系：kaashshorts28@gmail.com。<\/p>\n\n\n \n\n \n <\/pre>"} </script> <meta http-equiv="Cache-Control" 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<div id="377j5v51b" class="Articlelist_txts_info_head"> <div id="377j5v51b" class="author_info"> <a href="http://www.miracleart.cn/zh/member/1468492.html" class="author_avatar"> <img class="lazy" data-src="https://img.php.cn/upload/avatar/000/000/001/66ea8147b1057383.png" src="/static/imghw/default1.png" alt="Mary-Kate Olsen"> </a> <div id="377j5v51b" class="author_detail"> <a href="http://www.miracleart.cn/zh/member/1468492.html" class="author_name">Mary-Kate Olsen</a> </div> </div> </div> <span id="377j5v51b" class="Articlelist_txts_time">Dec 20, 2024 am 02:57 AM</span> </div> </div> <hr /> <div id="377j5v51b" class="article_main php-article"> <div id="377j5v51b" class="article-list-left detail-content-wrap content"> <ins class="adsbygoogle" style="display:block; text-align:center;" data-ad-layout="in-article" data-ad-format="fluid" data-ad-client="ca-pub-5902227090019525" data-ad-slot="3461856641"> </ins> <p><img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/173463463582725.jpg" class="lazy" alt="Mastering the JavaScript HTML DOM: Building Dynamic and Interactive Webpages"></p> <h3> <strong>JavaScript HTML DOM：完整指南</strong> </h3> <p><strong>文檔對(duì)象模型 (DOM)</strong> 是 Web 文檔的編程接口。它將網(wǎng)頁(yè)的結(jié)構(gòu)表示為對(duì)象樹，使開發(fā)人員能夠使用 JavaScript 操作 HTML 和 CSS。通過掌握 DOM，您可以創(chuàng)建動(dòng)態(tài)的交互式網(wǎng)頁(yè)。</p> <hr> <h3> <strong>什么是 DOM？</strong> </h3> <p>DOM 是 HTML 文檔的結(jié)構(gòu)化表示。它允許 JavaScript 動(dòng)態(tài)訪問和操作網(wǎng)頁(yè)的元素、屬性和內(nèi)容。 </p> <h4> 例子： </h4> <p>對(duì)于此 HTML：<br> </p> <pre class="brush:php;toolbar:false"><!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 </pre> <hr> <h3> <strong>訪問 DOM</strong> </h3> <p>JavaScript 提供了選擇和操作 DOM 元素的方法。 </p> <h4> <strong>常見的選擇方法</strong> </h4> <ol> <li> <strong>getElementById</strong> 通過 ID 選擇元素。 </li> </ol> <pre class="brush:php;toolbar:false"> const title = document.getElementById("title"); console.log(title.innerText); // Output: Hello, DOM! </pre> <ol> <li> <strong>getElementsByClassName</strong> 按類名選擇元素（返回集合）。 </li> </ol> <pre class="brush:php;toolbar:false"> const paragraphs = document.getElementsByClassName("description"); console.log(paragraphs[0].innerText); </pre> <ol> <li> <strong>getElementsByTagName</strong> 按標(biāo)簽名稱選擇元素（例如 div、p）。 </li> </ol> <pre class="brush:php;toolbar:false"> const headings = document.getElementsByTagName("h1"); console.log(headings[0].innerText); </pre> <ol> <li> <strong>查詢選擇器</strong> 選擇與 CSS 選擇器匹配的第一個(gè)元素。 </li> </ol> <pre class="brush:php;toolbar:false"> const title = document.querySelector("#title"); </pre> <ol> <li> <strong>querySelectorAll</strong> 選擇與 CSS 選擇器匹配的所有元素（返回 NodeList）。 </li> </ol> <pre class="brush:php;toolbar:false"> const paragraphs = document.querySelectorAll(".description"); </pre> <hr> <h3> <strong>DOM 操作</strong> </h3> <p>選擇后，您可以動(dòng)態(tài)修改元素、屬性和內(nèi)容。</p> <h4> <strong>1.更改內(nèi)容</strong> </h4> </pre> <ul> <li> <strong>innerHTML</strong>：設(shè)置或獲取 HTML 內(nèi)容。 </li> </ul> <pre class="brush:php;toolbar:false"> document.getElementById("title").innerHTML = "Welcome to the DOM!"; </pre> <ul> <li> <strong>innerText</strong> 或 <strong>textContent</strong>：設(shè)置或獲取純文本。 </li> </ul> <pre class="brush:php;toolbar:false"> document.getElementById("title").innerText = "Hello, World!"; </pre> <h4> <strong>2.更改屬性</strong> </h4> <ul> <li>使用setAttribute和getAttribute修改元素屬性。 </li> </ul> <pre class="brush:php;toolbar:false"> const link = document.querySelector("a"); link.setAttribute("href", "https://example.com"); </pre> <ul> <li>直接修改 id、className 或 src 等屬性。 </li> </ul> <pre class="brush:php;toolbar:false"> const image = document.querySelector("img"); image.src = "image.jpg"; </pre> <h4> <strong>3.改變風(fēng)格</strong> </h4> <p>直接修改 CSS 屬性。<br> </p> <pre class="brush:php;toolbar:false"><!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 </pre> <hr> <h3> <strong>添加和刪除元素</strong> </h3> <h4> <strong>1.添加元素</strong> </h4> </pre> <ul> <li> <strong>createElement</strong>：創(chuàng)建一個(gè)新元素。 </li> <li> <strong>appendChild</strong>：將元素追加到父元素。 </li> </ul> <pre class="brush:php;toolbar:false"> const title = document.getElementById("title"); console.log(title.innerText); // Output: Hello, DOM! </pre> <h4> <strong>2.刪除元素</strong> </h4> <ul> <li> <strong>removeChild</strong>：刪除子元素。 </li> </ul> <pre class="brush:php;toolbar:false"> const paragraphs = document.getElementsByClassName("description"); console.log(paragraphs[0].innerText); </pre> <hr> <h3> <strong>DOM 中的事件處理</strong> </h3> <p>事件是瀏覽器檢測(cè)到的操作或事件，例如單擊或按鍵。 </p> <h4> <strong>添加事件監(jiān)聽器</strong> </h4> <p>使用 addEventListener 將事件綁定到元素。<br> </p> <pre class="brush:php;toolbar:false"> const headings = document.getElementsByTagName("h1"); console.log(headings[0].innerText); </pre> <h4> <strong>常見事件</strong> </h4> <ol> <li> <strong>鼠標(biāo)事件</strong>：?jiǎn)螕簟㈦p擊、鼠標(biāo)懸停、鼠標(biāo)移出 </li> <li> <strong>鍵盤事件</strong>：keydown、keyup </li> <li> <strong>表單事件</strong>：提交、更改、聚焦 </li> </ol> <hr> <h3> <strong>遍歷 DOM</strong> </h3> <p>您可以使用 DOM 樹中的關(guān)系在元素之間導(dǎo)航。</p> <h4> <strong>家長(zhǎng)和孩子</strong> </h4> <ul> <li> <strong>parentNode</strong>：獲取父節(jié)點(diǎn)。 </li> <li> <strong>childNodes</strong>：列出所有子節(jié)點(diǎn)。 </li> <li> <strong>children</strong>：列出所有子元素。 </li> </ul> <pre class="brush:php;toolbar:false"> const title = document.querySelector("#title"); </pre> <h4> <strong>兄弟姐妹</strong> </h4> <ul> <li> <strong>nextSibling</strong>：獲取下一個(gè)兄弟節(jié)點(diǎn)。 </li> <li> <strong>previousSibling</strong>：獲取上一個(gè)兄弟節(jié)點(diǎn)。 </li> </ul> <hr> <h3> <strong>高級(jí) DOM 功能</strong> </h3> <h4> <strong>1.克隆元素</strong> </h4> <p>使用cloneNode創(chuàng)建元素的副本。<br> </p> <pre class="brush:php;toolbar:false"> const paragraphs = document.querySelectorAll(".description"); </pre> <h4> <strong>2.使用類</strong> </h4> <p>使用 classList 屬性來操作類。<br> </p> <pre class="brush:php;toolbar:false"> document.getElementById("title").innerHTML = "Welcome to the DOM!"; </pre> <h4> <strong>3.使用模板</strong> </h4> <p>HTML 模板允許重復(fù)使用內(nèi)容。<br> </p> <pre class="brush:php;toolbar:false"> document.getElementById("title").innerText = "Hello, World!"; </pre> <hr> <h3> <strong>DOM 操作的最佳實(shí)踐</strong> </h3> <ol> <li> <p><strong>最小化回流和重繪</strong>：</p> <ul> <li>批量 DOM 更改以避免過度渲染。 </li> <li>使用 documentFragment 進(jìn)行多次更新。 </li> </ul> </li> <li><p><strong>使用事件委托</strong>:<br><br> 將事件附加到父元素而不是單個(gè)子元素。<br> </p></li> </ol> <pre class="brush:php;toolbar:false"><!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 </pre> <ol> <li> <strong>避免內(nèi)聯(lián) JavaScript</strong>： 使用外部腳本或 addEventListener 來干凈地分離代碼。</li> </ol> <hr> <h3> <strong>結(jié)論</strong> </h3> <p>JavaScript HTML DOM 是創(chuàng)建動(dòng)態(tài)和交互式網(wǎng)頁(yè)的強(qiáng)大工具。通過掌握 DOM 操作、事件處理和最佳實(shí)踐，開發(fā)人員可以構(gòu)建響應(yīng)迅速且用戶友好的應(yīng)用程序，從而增強(qiáng)整體用戶體驗(yàn)。</p> <p><strong>嗨，我是 Abhay Singh Kathayat！</strong><br> 我是一名全棧開發(fā)人員，精通前端和后端技術(shù)。我使用各種編程語(yǔ)言和框架來構(gòu)建高效、可擴(kuò)展且用戶友好的應(yīng)用程序。<br> 請(qǐng)隨時(shí)通過我的商務(wù)電子郵件與我聯(lián)系：kaashshorts28@gmail.com。</p> </pre><p>以上是掌握 JavaScript HTML DOM：構(gòu)建動(dòng)態(tài)和交互式網(wǎng)頁(yè)的詳細(xì)內(nèi)容。更多信息請(qǐng)關(guān)注PHP中文網(wǎng)其他相關(guān)文章！</p> </div> </div> <div id="377j5v51b" class="wzconShengming_sp"> <div id="377j5v51b" class="bzsmdiv_sp">本站聲明</div> <div>本文內(nèi)容由網(wǎng)友自發(fā)貢獻(xiàn)，版權(quán)歸原作者所有，本站不承擔(dān)相應(yīng)法律責(zé)任。如您發(fā)現(xiàn)有涉嫌抄襲侵權(quán)的內(nèi)容，請(qǐng)聯(lián)系admin@php.cn</div> </div> </div> <ins 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