Explanation<\/p>\n\n
Document Type and Language Declaration:
\n<\/p>\n\n
\n<\/pre>\n\n\n\n告訴瀏覽器這是一個(gè) HTML5 文檔。
\n<\/p>\n\n\n<\/pre>\n\n\n\n開始 HTML 文檔并指定英語作為語言。這有助于搜索引擎和屏幕閱讀器理解文檔的語言。<\/p>\n\n
頭部：
\n<\/p>\n\n\n<\/pre>\n\n\n\n包含對(duì)文檔很重要但用戶不可見的元數(shù)據(jù)和鏈接。
\n<\/p>\n\n\n<\/pre>\n\n\n\n設(shè)置字符編碼，確保與大多數(shù)語言兼容。
\n<\/p>\n\n\n<\/pre>\n\n\n\n通過調(diào)整頁面布局以適應(yīng)不同的設(shè)備，使頁面具有響應(yīng)能力。
\n<\/p>\n\nCalculator<\/title>\n<\/pre>\n\n\n\n<p>設(shè)置瀏覽器選項(xiàng)卡上顯示的標(biāo)題。<br>\n<\/p><pre>\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n <meta charset=\"UTF-8\">\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n <title>Calculator<\/title>\n <link rel=\"stylesheet\" href=\"style.css\">\n<\/head>\n<body> <h1><a href="http://ipnx.cn/">亚洲国产日韩欧美一区二区三区,精品亚洲国产成人av在线,国产99视频精品免视看7,99国产精品久久久久久久成人热,欧美日韩亚洲国产综合乱</a></h1>\n <div>\n\n\n\n<p>Explanation<\/p>\n\n<p>Document Type and Language Declaration:<br>\n<\/p>\n\n<pre><!DOCTYPE html>\n<\/pre>\n\n\n\n<p>指向定義樣式的 CSS 文件的鏈接。<\/p>\n\n<p>計(jì)算器布局：<br>\n<\/p>\n\n<pre><html lang=\"en\">\n<\/pre>\n\n\n\n<p>指向處理計(jì)算器功能的 JavaScript 文件的鏈接。<\/p>\n\n<p>第 2 步：CSS 樣式 - 設(shè)計(jì)計(jì)算器界面<\/p>\n\n<p>現(xiàn)在我們有了結(jié)構(gòu)，讓我們開始設(shè)計(jì)樣式。此 CSS 代碼將使計(jì)算器看起來更現(xiàn)代，添加顏色、圓形按鈕、陰影和響應(yīng)式布局調(diào)整。<br>\n<\/p>\n\n<pre><head>\n<\/pre>\n\n\n\n<p>說明<\/p>\n\n<p>基本重置和字體：<br>\n<\/p>\n\n<pre><meta charset=\"UTF-8\">\n<\/pre>\n\n\n\n<p>刪除默認(rèn)的填充和邊距，將 box-sizing 設(shè)置為 border-box 以保持大小一致，并應(yīng)用現(xiàn)代字體。<\/p>\n\n<p>身體造型：<\/p>\n\n<p>body：使用 Flexbox 將計(jì)算器容器置于屏幕中央并應(yīng)用漸變背景。<\/p>\n\n<p>計(jì)算器容器：<\/p>\n\n<p>.calculator：添加內(nèi)邊距、圓角和陰影，打造整潔的卡片式外觀。<\/p>\n\n<p>顯示輸入：<\/p>\n\n<p>輸入：這種樣式為顯示區(qū)域提供了大字體和右對(duì)齊，類似于真正的計(jì)算器顯示。<\/p>\n\n<p>按鈕樣式：<\/p>\n\n<p>.計(jì)算器按鈕：設(shè)置帶有陰影效果、白色文本顏色和對(duì)齊間距的圓形按鈕。<\/p>\n\n<p>.actionbtn、.clearbtn 和 .enter：特定按鈕的樣式，使它們脫穎而出（例如，綠色表示運(yùn)算符，紅色表示清除，橙色表示等于）。<\/p>\n\n<p>第 3 步：這是所有 JavaScript 邏輯發(fā)生的地方 - 使計(jì)算器發(fā)揮作用<\/p>\n\n<p>結(jié)構(gòu)和風(fēng)格都已完成，讓我們使用 JavaScript 添加功能。該腳本允許我們處理按鈕的點(diǎn)擊、執(zhí)行算術(shù)并顯示結(jié)果。<br>\n<\/p>\n\n<pre><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n<\/pre>\n\n\n\n<p>說明<\/p>\n\n<p>頁面加載事件監(jiān)聽器：<br>\n<\/p>\n\n<pre><title>Calculator<\/title>\n<\/pre>\n\n\n\n<p>確保腳本在加載所有 HTML 內(nèi)容后運(yùn)行。<\/p>\n\n<p>輸入和按鈕變量：<br>\n<\/p>\n\n<pre><link rel=\"stylesheet\" href=\"style.css\">\n<\/pre>\n\n\n\n<p>選擇顯示區(qū)域。<br>\n<\/p>\n\n<pre><div>\n\n\n\n<p>Wraps the entire calculator interface. We’ll apply styles to this container to make it look like a calculator.<br>\n<\/p>\n\n<pre><input type=\"text\" placeholder=\"0\">\n\n\n\n<p>This is the display area of the calculator, where we show the current number or result. It is disabled, so users can’t type directly.<\/p>\n\n<p>Buttons:<br>\n<\/p>\n\n<pre><button>\n\n\n\n<p>Clears the calculator display and resets the current calculation.<br>\n<\/p>\n\n<pre><button>\n\n\n\n<p>Deletes the last entered character.<br>\n<\/p>\n\n<pre><button>\n\n\n\n<p>Toggles between positive and negative values.<br>\n<\/p>\n\n<pre><button>\n\n\n\n<p>The division operator.<\/p>\n\n<p>Remaining button elements represent numbers (0–9), operators (+, -, *, \/), and a decimal point (.). The = button (class=\"enter\") is used to evaluate the expression.<\/p>\n\n<p>JavaScript File:<br>\n<\/p>\n\n<pre> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head> <body data-commit-time="2023-12-28T14:50:12+08:00" class="editor_body body2_2"> <link rel="stylesheet" type="text/css" href="/static/csshw/stylehw.css"> <header> <div id="wjcelcm34c" class="head"> <div id="wjcelcm34c" class="haed_left"> <div id="wjcelcm34c" class="haed_logo"> <a href="http://ipnx.cn/zh/" title="" class="haed_logo_a"> <img src="/static/imghw/logo.png" alt="" class="haed_logoimg"> </a> </div> <div id="wjcelcm34c" class="head_nav"> <div id="wjcelcm34c" class="head_navs"> <a href="javascript:;" title="社區(qū)" class="head_nava head_nava-template1">社區(qū)</a> <div class="wjcelcm34c" id="dropdown-template1" style="display: none;"> <div id="wjcelcm34c" 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</div> </div> </div> </header> <main> <div id="wjcelcm34c" class="Article_Details_main"> <div id="wjcelcm34c" class="Article_Details_main1"> <div id="wjcelcm34c" class="Article_Details_main1M"> <div id="wjcelcm34c" class="phpgenera_Details_mainL1"> <a href="http://ipnx.cn/zh/" title="首頁" class="phpgenera_Details_mainL1a">首頁</a> <img src="/static/imghw/top_right.png" alt="" /> <a href="http://ipnx.cn/zh/web-designer.html" class="phpgenera_Details_mainL1a">web前端</a> <img src="/static/imghw/top_right.png" alt="" /> <a href="http://ipnx.cn/zh/css-tutorial.html" class="phpgenera_Details_mainL1a">css教程</a> <img src="/static/imghw/top_right.png" alt="" /> <span>構(gòu)建一個(gè)簡(jiǎn)單的基于 Web 的計(jì)算器：使用 Html CSS 和 JavaScript 分步 Guild</span> </div> <div id="wjcelcm34c" class="Articlelist_txts"> <div id="wjcelcm34c" class="Articlelist_txts_info"> <h1 class="Articlelist_txts_title">構(gòu)建一個(gè)簡(jiǎn)單的基于 Web 的計(jì)算器：使用 Html CSS 和 JavaScript 分步 Guild</h1> <div id="wjcelcm34c" class="Articlelist_txts_info_head"> <div id="wjcelcm34c" class="author_info"> <a href="http://ipnx.cn/zh/member/1468491.html" class="author_avatar"> <img class="lazy" data-src="https://img.php.cn/upload/avatar/000/000/001/66ea815b78d13863.png" src="/static/imghw/default1.png" alt="Patricia Arquette"> </a> <div id="wjcelcm34c" class="author_detail"> <a href="http://ipnx.cn/zh/member/1468491.html" class="author_name">Patricia Arquette</a> </div> </div> </div> <span id="wjcelcm34c" class="Articlelist_txts_time">Nov 11, 2024 pm 02:20 PM</span> </div> </div> <hr /> <div id="wjcelcm34c" class="article_main php-article"> <div id="wjcelcm34c" 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/000/000/000/173130600787793.jpg" class="lazy" alt="BUILDING A SIMPLE WEB-BASED CALCULATOR: Step-by-step Guild with Html CSS And JavaScript"></p> <p>創(chuàng)建計(jì)算器 Web 應(yīng)用程序是學(xué)習(xí) HTML、CSS 和 JavaScript 的絕佳項(xiàng)目。盡管計(jì)算器很常見或相當(dāng)普通，但從頭開始構(gòu)建計(jì)算器可以幫助初學(xué)者理解 Web 開發(fā)的基本概念，例如使用 HTML 構(gòu)建內(nèi)容、使用 CSS 設(shè)置元素樣式以及使用 JavaScript 添加交互功能。</p> <p>在本概述中，我們將逐步介紹創(chuàng)建功能齊全的計(jì)算器所需的代碼的每個(gè)部分。本指南不僅提供代碼，還將詳細(xì)解釋每一行，確保您了解所有內(nèi)容如何組合在一起。到本項(xiàng)目結(jié)束時(shí)，您將擁有一個(gè)流暢的交互式計(jì)算器，您可以對(duì)其進(jìn)行個(gè)性化設(shè)置，甚至可以使用更高級(jí)的功能進(jìn)行擴(kuò)展。</p> <p>計(jì)算器的功能<br> 該計(jì)算器包括基本功能：</p> <p>顯示當(dāng)前輸入和結(jié)果的顯示區(qū)域。</p> <p>數(shù)字按鈕 (0–9) 和一個(gè)附加的“00”按鈕。</p> <p>算術(shù)運(yùn)算按鈕：加法( )、減法(-)、乘法(*)、除法(/)。</p> <p>特殊按鈕：</p> <ul> <li><p>AC 清除當(dāng)前輸入。</p></li> <li><p>DEL 刪除最后一個(gè)字符。</p></li> <li><p> /- 在正數(shù)和負(fù)數(shù)之間切換。</p></li> <li><p>= 計(jì)算表達(dá)式并顯示結(jié)果。</p></li> </ul> <p>通過這個(gè)項(xiàng)目，您將學(xué)習(xí)如何：</p> <ul> <li><p>使用 HTML 創(chuàng)建用戶界面。</p></li> <li><p>使用 CSS 設(shè)計(jì)元素以提高視覺吸引力。</p></li> <li><p>使用 JavaScript 實(shí)現(xiàn)計(jì)算器邏輯來處理按鈕 <br> 交互并執(zhí)行計(jì)算。</p></li> </ul> <p>第 1 步：HTML 結(jié)構(gòu) - 構(gòu)建計(jì)算器的布局</p> <p>HTML 代碼為我們的計(jì)算器提供了基礎(chǔ)結(jié)構(gòu)。在這一部分中，我們定義了構(gòu)成計(jì)算器的元素，例如按鈕和顯示區(qū)域，您可以使用您選擇的任何編輯器來實(shí)現(xiàn)此效果，我個(gè)人更喜歡 Visual studio 代碼。以下是計(jì)算器的完整 HTML 代碼：<br> </p> <pre class="brush:php;toolbar:false"> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Calculator</title> <link rel="stylesheet" href="style.css"> </head> <body> <div> <p>Explanation</p> <p>Document Type and Language Declaration:<br> </p> <pre class="brush:php;toolbar:false"><!DOCTYPE html> </pre> <p>告訴瀏覽器這是一個(gè) HTML5 文檔。<br> </p> <pre class="brush:php;toolbar:false"><html lang="en"> </pre> <p>開始 HTML 文檔并指定英語作為語言。這有助于搜索引擎和屏幕閱讀器理解文檔的語言。</p> <p>頭部：<br> </p> <pre class="brush:php;toolbar:false"><head> </pre> <p>包含對(duì)文檔很重要但用戶不可見的元數(shù)據(jù)和鏈接。<br> </p> <pre class="brush:php;toolbar:false"><meta charset="UTF-8"> </pre> <p>設(shè)置字符編碼，確保與大多數(shù)語言兼容。<br> </p> <pre class="brush:php;toolbar:false"><meta name="viewport" content="width=device-width, initial-scale=1.0"> </pre> <p>通過調(diào)整頁面布局以適應(yīng)不同的設(shè)備，使頁面具有響應(yīng)能力。<br> </p> <pre class="brush:php;toolbar:false"><title>Calculator</title> </pre> <p>設(shè)置瀏覽器選項(xiàng)卡上顯示的標(biāo)題。<br> </p><pre class="brush:php;toolbar:false"> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Calculator</title> <link rel="stylesheet" href="style.css"> </head> <body> <div> <p>Explanation</p> <p>Document Type and Language Declaration:<br> </p> <pre class="brush:php;toolbar:false"><!DOCTYPE html> </pre> <p>指向定義樣式的 CSS 文件的鏈接。</p> <p>計(jì)算器布局：<br> </p> <pre class="brush:php;toolbar:false"><html lang="en"> </pre> <p>指向處理計(jì)算器功能的 JavaScript 文件的鏈接。</p> <p>第 2 步：CSS 樣式 - 設(shè)計(jì)計(jì)算器界面</p> <p>現(xiàn)在我們有了結(jié)構(gòu)，讓我們開始設(shè)計(jì)樣式。此 CSS 代碼將使計(jì)算器看起來更現(xiàn)代，添加顏色、圓形按鈕、陰影和響應(yīng)式布局調(diào)整。<br> </p> <pre class="brush:php;toolbar:false"><head> </pre> <p>說明</p> <p>基本重置和字體：<br> </p> <pre class="brush:php;toolbar:false"><meta charset="UTF-8"> </pre> <p>刪除默認(rèn)的填充和邊距，將 box-sizing 設(shè)置為 border-box 以保持大小一致，并應(yīng)用現(xiàn)代字體。</p> <p>身體造型：</p> <p>body：使用 Flexbox 將計(jì)算器容器置于屏幕中央并應(yīng)用漸變背景。</p> <p>計(jì)算器容器：</p> <p>.calculator：添加內(nèi)邊距、圓角和陰影，打造整潔的卡片式外觀。</p> <p>顯示輸入：</p> <p>輸入：這種樣式為顯示區(qū)域提供了大字體和右對(duì)齊，類似于真正的計(jì)算器顯示。</p> <p>按鈕樣式：</p> <p>.計(jì)算器按鈕：設(shè)置帶有陰影效果、白色文本顏色和對(duì)齊間距的圓形按鈕。</p> <p>.actionbtn、.clearbtn 和 .enter：特定按鈕的樣式，使它們脫穎而出（例如，綠色表示運(yùn)算符，紅色表示清除，橙色表示等于）。</p> <p>第 3 步：這是所有 JavaScript 邏輯發(fā)生的地方 - 使計(jì)算器發(fā)揮作用</p> <p>結(jié)構(gòu)和風(fēng)格都已完成，讓我們使用 JavaScript 添加功能。該腳本允許我們處理按鈕的點(diǎn)擊、執(zhí)行算術(shù)并顯示結(jié)果。<br> </p> <pre class="brush:php;toolbar:false"><meta name="viewport" content="width=device-width, initial-scale=1.0"> </pre> <p>說明</p> <p>頁面加載事件監(jiān)聽器：<br> </p> <pre class="brush:php;toolbar:false"><title>Calculator</title> </pre> <p>確保腳本在加載所有 HTML 內(nèi)容后運(yùn)行。</p> <p>輸入和按鈕變量：<br> </p> <pre class="brush:php;toolbar:false"><link rel="stylesheet" href="style.css"> </pre> <p>選擇顯示區(qū)域。<br> </p> <pre class="brush:php;toolbar:false"><div> <p>Wraps the entire calculator interface. We’ll apply styles to this container to make it look like a calculator.<br> </p> <pre class="brush:php;toolbar:false"><input type="text" placeholder="0"> <p>This is the display area of the calculator, where we show the current number or result. It is disabled, so users can’t type directly.</p> <p>Buttons:<br> </p> <pre class="brush:php;toolbar:false"><button> <p>Clears the calculator display and resets the current calculation.<br> </p> <pre class="brush:php;toolbar:false"><button> <p>Deletes the last entered character.<br> </p> <pre class="brush:php;toolbar:false"><button> <p>Toggles between positive and negative values.<br> </p> <pre class="brush:php;toolbar:false"><button> <p>The division operator.</p> <p>Remaining button elements represent numbers (0–9), operators (+, -, *, /), and a decimal point (.). The = button (class="enter") is used to evaluate the expression.</p> <p>JavaScript File:<br> </p> <pre class="brush:php;toolbar:false"><script src="script.js"></script> </pre> <p>將所有按鈕收集在一個(gè)數(shù)組中以便于操作。</p> <p>按鈕點(diǎn)擊事件：<br> </p> <pre class="brush:php;toolbar:false">*{ padding: 0; margin: 0; box-sizing: border-box; font-family: 'poppins', sans-serif; } body{ width: 100vw; height: 100vh; display: flex; justify-content: center; align-items: center; background: linear-gradient(45deg, #0a0a0a, #3a4452); } .calculator{ border: 1px solid #a2a2a2; padding: 20px; border-radius: 20px; background: transparent; box-shadow: 0px 3px 15px rgba(113, 115, 119, 0.5); } input{ width: 272px; min-height: 100px; border: none; padding: 5px; margin: 10px; background: transparent; font-size: 40px; text-align: right; cursor: text; outline: none; color: #fff; } input::placeholder{ color: #fff; } .calculator button{ width: 50px; height: 50px; margin: 10px; border-radius: 50%; border: none; box-shadow: -5px 3px 10px rgba(9, 9, 9, 0.5); background: transparent; color: #fff; cursor: pointer; outline: none; } .calculator .actionbtn{ color: #1afe17; } .calculator .clearbtn{ background: #f31d1f; } .calculator .enter{ background: #f5881a; } </pre> <p>為每個(gè)按鈕添加點(diǎn)擊事件。根據(jù)按鈕的不同，執(zhí)行不同的操作：</p> <p>顯示字體大小調(diào)整：當(dāng)輸入長(zhǎng)度超過 10 個(gè)字符時(shí)縮小字體大小。</p> <p>等號(hào) (=)：使用 eval() 計(jì)算表達(dá)式并顯示結(jié)果。如果出現(xiàn)錯(cuò)誤（例如無效語法），則會(huì)顯示“錯(cuò)誤”。</p> <p>清除 (AC)：重置字符串并清除顯示。</p> <p>刪除 (DEL)：從字符串中刪除最后一個(gè)字符并更新顯示。</p> <p>數(shù)字和運(yùn)算符按鈕：將按鈕的值添加到字符串并更新顯示。</p> <p>切換符號(hào) ( /-):<br> </p> <pre class="brush:php;toolbar:false">* { padding: 0; margin: 0; box-sizing: border-box; font-family: 'Poppins', sans-serif; } </pre> <p>將當(dāng)前數(shù)字乘以 -1 以在正值和負(fù)值之間切換。</p><p>最后，使用 HTML、CSS 和 JavaScript 構(gòu)建一個(gè)簡(jiǎn)單但功能強(qiáng)大的計(jì)算器 Web 應(yīng)用程序?qū)τ诔鯇W(xué)者和經(jīng)驗(yàn)豐富的開發(fā)人員來說都是一個(gè)很棒的項(xiàng)目。通過仔細(xì)結(jié)合 HTML 提供的結(jié)構(gòu)基礎(chǔ)、CSS 賦予的風(fēng)格元素以及 JavaScript 提供的交互功能，我們可以創(chuàng)建一個(gè)直觀的工具，它不僅能滿足其主要目的，還能演示核心 Web 開發(fā)概念。</p> <p>此外，該項(xiàng)目為進(jìn)一步探索和增強(qiáng)開辟了廣泛的可能性。這里吸取的經(jīng)驗(yàn)教訓(xùn)為更復(fù)雜的項(xiàng)目提供了全面的基礎(chǔ)。 Web 開發(fā)是一個(gè)持續(xù)的學(xué)習(xí)過程，該項(xiàng)目展示了每一行代碼如何為功能性、引人入勝的體驗(yàn)做出貢獻(xiàn)。</p> <p>隨著您不斷提高自己的技能，請(qǐng)考慮如何使這個(gè)計(jì)算器更加用戶友好和強(qiáng)大。嘗試不同的布局，嘗試實(shí)現(xiàn)額外的數(shù)學(xué)函數(shù)。您所做的每一次更改都會(huì)加深您對(duì)編碼原則的理解并增強(qiáng)您的開發(fā)資源。</p> <p>編碼快樂！</p> </pre></pre><p>以上是構(gòu)建一個(gè)簡(jiǎn)單的基于 Web 的計(jì)算器：使用 Html CSS 和 JavaScript 分步 Guild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="wjcelcm34c" class="wzconShengming_sp"> <div id="wjcelcm34c" 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 class="adsbygoogle" style="display:block" data-ad-format="autorelaxed" data-ad-client="ca-pub-5902227090019525" 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href="http://ipnx.cn/zh/faq/1796832540.html" title="揭開CSS單元的神秘面紗：PX，EM，REM，VW，VH比較" class="phphistorical_Version2_mids_img"> <img onerror="this.onerror=''; this.src='/static/imghw/default1.png'" src="/static/imghw/default1.png" class="lazy" data-src="https://img.php.cn/upload/article/001/253/068/175191219061804.jpg?x-oss-process=image/resize,m_fill,h_207,w_330" alt="揭開CSS單元的神秘面紗：PX，EM，REM，VW，VH比較" /> </a> <a href="http://ipnx.cn/zh/faq/1796832540.html" title="揭開CSS單元的神秘面紗：PX，EM，REM，VW，VH比較" class="phphistorical_Version2_mids_title">揭開CSS單元的神秘面紗：PX，EM，REM，VW，VH比較</a> <span id="wjcelcm34c" class="Articlelist_txts_time">Jul 08, 2025 am 02:16 AM</span> <p class="Articlelist_txts_p">CSS單位的選擇取決于設(shè)計(jì)需求和響應(yīng)式要求。1.px用于固定尺寸，適合精確控制但缺乏彈性；2.em是相對(duì)單位，受父元素影響易導(dǎo)致級(jí)聯(lián)問題，rem則基于根元素更穩(wěn)定，適合全局縮放；3.vw/vh基于視口大小，適合響應(yīng)式設(shè)計(jì)，但需注意極端屏幕下的表現(xiàn)；4.選擇時(shí)應(yīng)根據(jù)是否需要響應(yīng)式調(diào)整、元素層級(jí)關(guān)系及視口依賴程度來決定，合理搭配使用可提升布局靈活性與維護(hù)性。</p> </div> <div id="wjcelcm34c" 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