{"id":88309,"date":"2024-04-07T17:28:04","date_gmt":"2024-04-07T09:28:04","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/88309.html"},"modified":"2024-04-07T17:28:05","modified_gmt":"2024-04-07T09:28:05","slug":"%e5%89%8d%e7%ab%af%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e5%8a%a8%e6%80%81%e4%b8%bb%e9%a2%98","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/88309.html","title":{"rendered":"\u524d\u7aef\u5982\u4f55\u5b9e\u73b0\u52a8\u6001\u4e3b\u9898"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/02172656\/6149fc86-f111-427d-8825-0ffc756f342f.webp\" alt=\"\u524d\u7aef\u5982\u4f55\u5b9e\u73b0\u52a8\u6001\u4e3b\u9898\" \/><\/p>\n<p><p>\u524d\u7aef\u5b9e\u73b0\u52a8\u6001\u4e3b\u9898\u4e3b\u8981\u4f9d\u9760<strong>CSS \u53d8\u91cf\u3001JavaScript \u64cd\u7eb5 DOM<\/strong>\u3001<strong>Web \u5b58\u50a8 API<\/strong>\uff0c\u4ee5\u53ca<strong>CSS \u5a92\u4f53\u67e5\u8be2<\/strong>\u3002\u8fd9\u4e9b\u6280\u672f\u8054\u5408\u4f7f\u7528\uff0c\u53ef\u4ee5\u7075\u6d3b\u5730\u5728\u7528\u6237\u754c\u9762\u4e0a\u5207\u6362\u4e3b\u9898\u8272\u5f69\u548c\u6837\u5f0f\uff0c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002\u5176\u4e2d\uff0cCSS \u53d8\u91cf\u7684\u4f7f\u7528\u5c24\u4e3a\u5173\u952e\uff0c\u5b83\u5141\u8bb8\u6211\u4eec\u5728\u6837\u5f0f\u8868\u4e2d\u5b9a\u4e49\u53ef\u91cd\u7528\u7684\u503c\uff0c\u8fd9\u4e9b\u503c\u53ef\u4ee5\u5728\u591a\u4e2a\u5730\u65b9\u5f15\u7528\uff0c\u5e76\u4e14\u53ef\u4ee5\u901a\u8fc7 JavaScript \u52a8\u6001\u5730\u4fee\u6539\u8fd9\u4e9b\u503c\u6765\u5b9e\u73b0\u4e3b\u9898\u7684\u5207\u6362\u3002\u8fd9\u6837\uff0c\u5f53\u9700\u8981\u66f4\u6539\u4e3b\u9898\u65f6\uff0c\u6211\u4eec\u53ea\u9700\u8981\u66f4\u6539\u4e00\u7ec4\u53d8\u91cf\u7684\u503c\uff0c\u800c\u4e0d\u662f\u66ff\u6362\u6574\u4e2a\u6837\u5f0f\u8868\uff0c\u8fd9\u5927\u5927\u7b80\u5316\u4e86\u4e3b\u9898\u5207\u6362\u7684\u5b9e\u73b0\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001CSS \u53d8\u91cf\u7684\u5b9a\u4e49\u4e0e\u5e94\u7528<\/h3>\n<\/p>\n<p><p>CSS \u53d8\u91cf\uff0c\u4e5f\u79f0\u4e3a\u81ea\u5b9a\u4e49\u5c5e\u6027\uff0c\u662f CSS \u7684\u4e00\u9879\u5f3a\u5927\u529f\u80fd\uff0c\u5b83\u5141\u8bb8\u5f00\u53d1\u8005\u5b9a\u4e49\u4e00\u4e2a\u503c\u5e76\u5728\u6574\u4e2a\u6587\u6863\u4e2d\u91cd\u590d\u4f7f\u7528\u8be5\u503c\u3002\u5b9a\u4e49 CSS \u53d8\u91cf\u901a\u5e38\u5728 <code>:root<\/code> \u4f2a\u7c7b\u4e2d\u8fdb\u884c\uff0c\u8fd9\u6837\u786e\u4fdd\u4e86\u5728\u5168\u5c40\u8303\u56f4\u5185\u90fd\u80fd\u8bbf\u95ee\u5230\u8fd9\u4e9b\u53d8\u91cf\u3002<\/p>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u5b9a\u4e49\u4e00\u7ec4\u57fa\u7840\u7684\u4e3b\u9898\u53d8\u91cf\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-css\">:root {<\/p>\n<p>  --primary-color: #007bff;<\/p>\n<p>  --background-color: #fff;<\/p>\n<p>  --text-color: #333;<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u968f\u540e\uff0c\u5728CSS\u4e2d\u5f15\u7528\u8fd9\u4e9b\u53d8\u91cf\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-css\">body {<\/p>\n<p>  background-color: var(--background-color);<\/p>\n<p>  color: var(--text-color);<\/p>\n<p>}<\/p>\n<p>.button {<\/p>\n<p>  background-color: var(--primary-color);<\/p>\n<p>  color: var(--background-color);<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u5f53\u6211\u4eec\u9700\u8981\u5207\u6362\u4e3b\u9898\u65f6\uff0c\u53ea\u9700\u901a\u8fc7 JavaScript \u4fee\u6539 <code>:root<\/code> \u4e2d\u7684\u53d8\u91cf\u503c\uff0cUI \u5c31\u4f1a\u81ea\u52a8\u66f4\u65b0\u4e3a\u65b0\u7684\u4e3b\u9898\u8272\u5f69\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001JavaScript \u5207\u6362\u4e3b\u9898<\/h3>\n<\/p>\n<p><p>\u8981\u901a\u8fc7 JavaScript \u52a8\u6001\u5207\u6362\u4e3b\u9898\uff0c\u9996\u5148\u9700\u8981\u7f16\u5199\u51fd\u6570\u6765\u66f4\u6539 <code>:root<\/code> \u4e2d CSS \u53d8\u91cf\u7684\u503c\u3002\u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\uff0c\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u4e3b\u9898\u5bf9\u8c61\uff0c\u7528\u4e8e\u5b58\u50a8\u4e0d\u540c\u4e3b\u9898\u7684\u989c\u8272\u503c\u3002\u6839\u636e\u7528\u6237\u7684\u9009\u62e9\uff0c\u6211\u4eec\u53ef\u4ee5\u66ff\u6362\u5f53\u524d\u4e3b\u9898\u53d8\u91cf\u7684\u503c\u6765\u5b9e\u73b0\u4e3b\u9898\u7684\u52a8\u6001\u5207\u6362\u3002<\/p>\n<\/p>\n<p><p>\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">const themes = {<\/p>\n<p>  dark: {<\/p>\n<p>    &#039;--primary-color&#039;: &#039;#17a2b8&#039;,<\/p>\n<p>    &#039;--background-color&#039;: &#039;#343a40&#039;,<\/p>\n<p>    &#039;--text-color&#039;: &#039;#fff&#039;,<\/p>\n<p>  },<\/p>\n<p>  light: {<\/p>\n<p>    &#039;--primary-color&#039;: &#039;#007bff&#039;,<\/p>\n<p>    &#039;--background-color&#039;: &#039;#fff&#039;,<\/p>\n<p>    &#039;--text-color&#039;: &#039;#333&#039;,<\/p>\n<p>  },<\/p>\n<p>};<\/p>\n<p>function switchTheme(newTheme) {<\/p>\n<p>  const theme = themes[newTheme];<\/p>\n<p>  for (let variable in theme) {<\/p>\n<p>    document.documentElement.style.setProperty(variable, theme[variable]);<\/p>\n<p>  }<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u51fd\u6570\u4e2d\uff0c<code>document.documentElement.style.setProperty<\/code> \u65b9\u6cd5\u7528\u4e8e\u66f4\u65b0 CSS \u53d8\u91cf\u7684\u503c\u3002\u8fd9\u79cd\u65b9\u6cd5\u6781\u5927\u5730\u589e\u52a0\u4e86\u524d\u7aef\u4e3b\u9898\u5207\u6362\u7684\u7075\u6d3b\u6027\u548c\u4fbf\u6377\u6027\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u5229\u7528 Web \u5b58\u50a8 API \u4fdd\u5b58\u4e3b\u9898\u504f\u597d<\/h3>\n<\/p>\n<p><p>\u4e3a\u4e86\u63d0\u5347\u7528\u6237\u4f53\u9a8c\uff0c\u53ef\u4ee5\u4f7f\u7528 Web \u5b58\u50a8 API\uff08\u5982 localStorage\uff09\u6765\u4fdd\u5b58\u7528\u6237\u7684\u4e3b\u9898\u504f\u597d\u3002\u8fd9\u6837\uff0c\u5f53\u7528\u6237\u4e0b\u6b21\u8bbf\u95ee\u7f51\u7ad9\u65f6\uff0c\u53ef\u4ee5\u81ea\u52a8\u52a0\u8f7d\u4ed6\u4eec\u504f\u597d\u7684\u4e3b\u9898\uff0c\u800c\u65e0\u9700\u624b\u52a8\u5207\u6362\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">function storeThemePreference(theme) {<\/p>\n<p>  localStorage.setItem(&#039;preferredTheme&#039;, theme);<\/p>\n<p>}<\/p>\n<p>function loadThemePreference() {<\/p>\n<p>  const preferredTheme = localStorage.getItem(&#039;preferredTheme&#039;);<\/p>\n<p>  if (preferredTheme) {<\/p>\n<p>    switchTheme(preferredTheme);<\/p>\n<p>  }<\/p>\n<p>}<\/p>\n<p>\/\/ \u9875\u9762\u52a0\u8f7d\u65f6\u8c03\u7528<\/p>\n<p>loadThemePreference();<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u56db\u3001\u4f7f\u7528\u5a92\u4f53\u67e5\u8be2\u5b9e\u73b0\u81ea\u52a8\u4e3b\u9898\u5207\u6362<\/h3>\n<\/p>\n<p><p>\u901a\u8fc7CSS\u5a92\u4f53\u67e5\u8be2\uff08Media Query\uff09\uff0c\u53ef\u4ee5\u6839\u636e\u7cfb\u7edf\u4e3b\u9898\u504f\u597d\u81ea\u52a8\u8c03\u6574\u7f51\u7ad9\u4e3b\u9898\u3002\u8fd9\u5bf9\u4e8e\u5b9e\u73b0\u6839\u636e\u64cd\u4f5c\u7cfb\u7edf\u8272\u5f69\u65b9\u6848\uff08\u5982\u6df1\u8272\u6a21\u5f0f\u548c\u6d45\u8272\u6a21\u5f0f\uff09\u81ea\u52a8\u5207\u6362\u7f51\u7ad9\u4e3b\u9898\u5c24\u4e3a\u6709\u7528\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-css\">@media (prefers-color-scheme: dark) {<\/p>\n<p>  :root {<\/p>\n<p>    --primary-color: #17a2b8;<\/p>\n<p>    --background-color: #343a40;<\/p>\n<p>    --text-color: #fff;<\/p>\n<p>  }<\/p>\n<p>}<\/p>\n<p>@media (prefers-color-scheme: light) {<\/p>\n<p>  :root {<\/p>\n<p>    --primary-color: #007bff;<\/p>\n<p>    --background-color: #fff;<\/p>\n<p>    --text-color: #333;<\/p>\n<p>  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