見微知著，細(xì)節(jié)上雕花：SVG生成矢量格式網(wǎng)站圖標(biāo)(Favicon)探究

時(shí)間：2023-05-21 20:56:01 | 來源：網(wǎng)站運(yùn)營(yíng)

時(shí)間：2023-05-21 20:56:01 來源：網(wǎng)站運(yùn)營(yíng)

見微知著，細(xì)節(jié)上雕花：SVG生成矢量格式網(wǎng)站圖標(biāo)(Favicon)探究：原文轉(zhuǎn)載自「劉悅的技術(shù)博客」https://v3u.cn/a_id_215

Favicon是favorites icon的縮寫，也被稱為website icon（站點(diǎn)圖標(biāo)）、page icon（頁(yè)面圖標(biāo)）或者urlicon（URL圖標(biāo)）。Favicon是與某個(gè)站點(diǎn)或網(wǎng)頁(yè)相關(guān)聯(lián)的圖標(biāo)，網(wǎng)站設(shè)計(jì)者可以多種方式建立這種圖標(biāo)，幾乎所有瀏覽器都支持此功能，瀏覽器可以將favicon顯示于瀏覽器的地址欄中，也可置于書簽列表的網(wǎng)站名前，還可以放在標(biāo)簽式瀏覽界面中的頁(yè)標(biāo)題前：







我們定義一個(gè)favicon的方法是將一個(gè)名為“favicon.ico”的文件置于Web服務(wù)器的根目錄下，IE的收藏夾（即書簽）可以自動(dòng)顯示該文件。后來出現(xiàn)了一種更為靈活的方法，即使用HTML來為任何一個(gè)網(wǎng)頁(yè)指示其圖標(biāo)所存儲(chǔ)的位置：

<link rel="icon" href="favicon.ico" type="image/x-icon" />大多數(shù)情況下使用ICO格式，現(xiàn)代瀏覽器也支持PNG（便攜式網(wǎng)絡(luò)圖片）格式，和GIF（圖形交換格式）動(dòng)畫圖像格式：

<link rel="icon" href="/favicon.png" type="image/png" />現(xiàn)如今，我們可以使用另外一種矢量格式來創(chuàng)建favicon了，那就是SVG。

SVG格式favicon

SVG 能夠在不損失質(zhì)量的情況下放大和縮小，并且尺寸上比以往任何圖片格式都小，它們還可以嵌入 CSS，甚至嵌入動(dòng)畫和媒體查詢。這意味著如果在瀏覽器應(yīng)用程序或書簽欄中使用 SVG 圖標(biāo)，由于 SVG 內(nèi)部提供的深色偏好樣式，用戶有可能獲取與站點(diǎn)主題相關(guān)的（淺色或深色）圖標(biāo)。

首先在站點(diǎn)根目錄建立favicon.svg文件：

<svg xmlns="http://www.w3.org/2000/svg" width="400" height="344" viewBox="0 0 400 344" > </svg>接下來，添加svg路徑path:

<svg xmlns="http://www.w3.org/2000/svg" width="400" height="344" viewBox="0 0 400 344" > <path d="M108.731 4.224c-5.097 2.044-13.302 4.448-18.232 5.342C74.059 12.548 20 32.992 20 36.228c0 3.085 25.52 16.117 57.488 29.357 22.898 9.483 222.126 9.483 245.024 0C354.48 52.345 380 39.313 380 36.228c0-3.253-54.096-23.687-70.663-26.691-5.021-.911-13.792-3.429-19.493-5.596-13.064-4.967-168.627-4.724-181.113.283M8 48.043c0 1.917 1.745 4.563 3.878 5.882 2.133 1.318 12.366 18.074 22.741 37.236 10.374 19.161 20.693 36.07 22.931 37.575 4.769 3.207 11.4.038 8.783-4.197-.989-1.6 3.291-12.214 9.51-23.587C88.818 77.225 89.097 77.722 54 61.968 23.556 48.302 8 43.593 8 48.043M344.002 62.66c-16.498 7.701-30.539 14.544-31.202 15.207-1.381 1.381 22.346 46.434 27.1 51.455 1.729 1.827 9.039-7.173 16.243-20C363.347 96.495 371.941 82.85 375.241 79c3.299-3.85 4.774-7 3.276-7-1.497 0 .07-5.4 3.483-12 8.403-16.25 1.474-15.765-37.998 2.66m37.606 16.215c-30.721 50.032-31.314 60.191-3.03 51.963l19.422-5.65 1.188-29.206c1.51-37.145-2.738-41.278-17.58-17.107M2.521 73C1.195 77.95.085 92.215.055 104.699L0 127.398l20.74 6.08c28.87 8.463 29.274 6.83 8.326-33.606C9.326 61.767 6.341 58.746 2.521 73m110.146 10.683C114.729 89.379 195.183 156 200 156c4.817 0 85.271-66.621 87.333-72.317C288.12 81.51 252.327 80 200 80s-88.12 1.51-87.333 3.683m-30.303 26.46C66.423 139.145 65.223 144 74 144c3.3 0 6 1.8 6 4s-1.993 4-4.428 4c-6.934 0-1.717 9.949 35.654 68 53.738 83.475 79.385 120.055 82.199 117.241 3.682-3.681 3.198-168.384-.501-170.67-1.692-1.045-24.642-4.975-51-8.732C115.566 154.083 91.3 149.353 88 147.33c-4.176-2.56-2.352-3.068 6-1.671 45.724 7.648 75.402 10.539 78.312 7.629 2.804-2.804-53.996-56.062-70.691-66.283-3.286-2.012-9.608 5.585-19.257 23.138m178.116 8.755c-47.058 40.072-44.179 41.765 45.52 26.761 8.352-1.397 10.176-.889 6 1.671-3.3 2.023-27.6 6.735-54 10.471-59.576 8.43-53.48-2.339-54.84 96.88l-1.16 84.6 10.877-6.43c5.982-3.537 10.194-7.114 9.359-7.948-.835-.835 20.553-35.13 47.529-76.211 57.798-88.02 61.073-93.746 54.809-95.834-6.667-2.222-5.599-8.858 1.426-8.858 8.814 0 7.469-6.312-6.923-32.493-16.217-29.497-15.114-29.636-58.597 7.391M10.316 139.489c-1.371 2.219.939 7.291 5.134 11.273 4.196 3.981 15.486 16.398 25.089 27.593C92.117 238.484 140.91 292 144.153 292c3.177 0-28.76-53.245-40.041-66.755-5.318-6.37-32.442-49.301-40.787-64.558-4.781-8.74-11.38-13.47-23.25-16.667-9.117-2.455-18.981-5.386-21.921-6.514-2.939-1.128-6.467-.236-7.838 1.983m352.939 3.821C346.065 149.445 320 175.954 320 187.302c0 4.451-31.767 49.864-37.519 53.637-2.465 1.616-3.113 2.966-1.44 3 1.672.033-3.551 9.988-11.607 22.121-33.436 50.36-6.59 24.004 97.718-95.933 30.446-35.007 29.884-38.873-3.897-26.817" fill-rule="evenodd"/> </svg>隨后，在網(wǎng)站頭部標(biāo)簽中，修改icon聲明：

<link rel="icon" href="/favicon.svg" type="image/svg+xml" />隨后就可以在標(biāo)簽頁(yè)中觀察到svg格式的favicon了：







這里需要注意的是，兩種不同的favicon聲明方式并不是非此即彼，它們可以共存：

<link rel="icon" href="/favicon.png" type="image/png" /> <link rel="icon" href="/favicon.svg" type="image/svg+xml" />以Chrome為例子，瀏覽器會(huì)優(yōu)先選擇svg格式的圖標(biāo)進(jìn)行展示，如果聲明了png的favicon，那么png格式的圖標(biāo)也會(huì)被下載：







所以，如果出于性能層面考慮，可以只寫一種聲明，用來節(jié)約系統(tǒng)資源。

SVG樣式

有的時(shí)候，在頁(yè)面對(duì)比度層面，我們可以為svg圖標(biāo)設(shè)置前景色或者背景色來突出favicon：

<svg xmlns="http://www.w3.org/2000/svg" width="400" height="344" viewBox="0 0 400 344" style="background-color:#dedede"><path style="fill:#231f20;stroke:none;" d="M108.731 4.224c-5.097 2.044-13.302 4.448-18.232 5.342C74.059 12.548 20 32.992 20 36.228c0 3.085 25.52 16.117 57.488 29.357 22.898 9.483 222.126 9.483 245.024 0C354.48 52.345 380 39.313 380 36.228c0-3.253-54.096-23.687-70.663-26.691-5.021-.911-13.792-3.429-19.493-5.596-13.064-4.967-168.627-4.724-181.113.283M8 48.043c0 1.917 1.745 4.563 3.878 5.882 2.133 1.318 12.366 18.074 22.741 37.236 10.374 19.161 20.693 36.07 22.931 37.575 4.769 3.207 11.4.038 8.783-4.197-.989-1.6 3.291-12.214 9.51-23.587C88.818 77.225 89.097 77.722 54 61.968 23.556 48.302 8 43.593 8 48.043M344.002 62.66c-16.498 7.701-30.539 14.544-31.202 15.207-1.381 1.381 22.346 46.434 27.1 51.455 1.729 1.827 9.039-7.173 16.243-20C363.347 96.495 371.941 82.85 375.241 79c3.299-3.85 4.774-7 3.276-7-1.497 0 .07-5.4 3.483-12 8.403-16.25 1.474-15.765-37.998 2.66m37.606 16.215c-30.721 50.032-31.314 60.191-3.03 51.963l19.422-5.65 1.188-29.206c1.51-37.145-2.738-41.278-17.58-17.107M2.521 73C1.195 77.95.085 92.215.055 104.699L0 127.398l20.74 6.08c28.87 8.463 29.274 6.83 8.326-33.606C9.326 61.767 6.341 58.746 2.521 73m110.146 10.683C114.729 89.379 195.183 156 200 156c4.817 0 85.271-66.621 87.333-72.317C288.12 81.51 252.327 80 200 80s-88.12 1.51-87.333 3.683m-30.303 26.46C66.423 139.145 65.223 144 74 144c3.3 0 6 1.8 6 4s-1.993 4-4.428 4c-6.934 0-1.717 9.949 35.654 68 53.738 83.475 79.385 120.055 82.199 117.241 3.682-3.681 3.198-168.384-.501-170.67-1.692-1.045-24.642-4.975-51-8.732C115.566 154.083 91.3 149.353 88 147.33c-4.176-2.56-2.352-3.068 6-1.671 45.724 7.648 75.402 10.539 78.312 7.629 2.804-2.804-53.996-56.062-70.691-66.283-3.286-2.012-9.608 5.585-19.257 23.138m178.116 8.755c-47.058 40.072-44.179 41.765 45.52 26.761 8.352-1.397 10.176-.889 6 1.671-3.3 2.023-27.6 6.735-54 10.471-59.576 8.43-53.48-2.339-54.84 96.88l-1.16 84.6 10.877-6.43c5.982-3.537 10.194-7.114 9.359-7.948-.835-.835 20.553-35.13 47.529-76.211 57.798-88.02 61.073-93.746 54.809-95.834-6.667-2.222-5.599-8.858 1.426-8.858 8.814 0 7.469-6.312-6.923-32.493-16.217-29.497-15.114-29.636-58.597 7.391M10.316 139.489c-1.371 2.219.939 7.291 5.134 11.273 4.196 3.981 15.486 16.398 25.089 27.593C92.117 238.484 140.91 292 144.153 292c3.177 0-28.76-53.245-40.041-66.755-5.318-6.37-32.442-49.301-40.787-64.558-4.781-8.74-11.38-13.47-23.25-16.667-9.117-2.455-18.981-5.386-21.921-6.514-2.939-1.128-6.467-.236-7.838 1.983m352.939 3.821C346.065 149.445 320 175.954 320 187.302c0 4.451-31.767 49.864-37.519 53.637-2.465 1.616-3.113 2.966-1.44 3 1.672.033-3.551 9.988-11.607 22.121-33.436 50.36-6.59 24.004 97.718-95.933 30.446-35.007 29.884-38.873-3.897-26.817" fill-rule="evenodd"/></svg>





也可以通過設(shè)置svg的viewBox屬性來等比例縮小或者放大圖標(biāo)：

<svg xmlns="http://www.w3.org/2000/svg" width="400" height="344" viewBox="-10 0 425 369" style="background-color:#dedede"><path style="fill:#231f20;stroke:none;" d="M108.731 4.224c-5.097 2.044-13.302 4.448-18.232 5.342C74.059 12.548 20 32.992 20 36.228c0 3.085 25.52 16.117 57.488 29.357 22.898 9.483 222.126 9.483 245.024 0C354.48 52.345 380 39.313 380 36.228c0-3.253-54.096-23.687-70.663-26.691-5.021-.911-13.792-3.429-19.493-5.596-13.064-4.967-168.627-4.724-181.113.283M8 48.043c0 1.917 1.745 4.563 3.878 5.882 2.133 1.318 12.366 18.074 22.741 37.236 10.374 19.161 20.693 36.07 22.931 37.575 4.769 3.207 11.4.038 8.783-4.197-.989-1.6 3.291-12.214 9.51-23.587C88.818 77.225 89.097 77.722 54 61.968 23.556 48.302 8 43.593 8 48.043M344.002 62.66c-16.498 7.701-30.539 14.544-31.202 15.207-1.381 1.381 22.346 46.434 27.1 51.455 1.729 1.827 9.039-7.173 16.243-20C363.347 96.495 371.941 82.85 375.241 79c3.299-3.85 4.774-7 3.276-7-1.497 0 .07-5.4 3.483-12 8.403-16.25 1.474-15.765-37.998 2.66m37.606 16.215c-30.721 50.032-31.314 60.191-3.03 51.963l19.422-5.65 1.188-29.206c1.51-37.145-2.738-41.278-17.58-17.107M2.521 73C1.195 77.95.085 92.215.055 104.699L0 127.398l20.74 6.08c28.87 8.463 29.274 6.83 8.326-33.606C9.326 61.767 6.341 58.746 2.521 73m110.146 10.683C114.729 89.379 195.183 156 200 156c4.817 0 85.271-66.621 87.333-72.317C288.12 81.51 252.327 80 200 80s-88.12 1.51-87.333 3.683m-30.303 26.46C66.423 139.145 65.223 144 74 144c3.3 0 6 1.8 6 4s-1.993 4-4.428 4c-6.934 0-1.717 9.949 35.654 68 53.738 83.475 79.385 120.055 82.199 117.241 3.682-3.681 3.198-168.384-.501-170.67-1.692-1.045-24.642-4.975-51-8.732C115.566 154.083 91.3 149.353 88 147.33c-4.176-2.56-2.352-3.068 6-1.671 45.724 7.648 75.402 10.539 78.312 7.629 2.804-2.804-53.996-56.062-70.691-66.283-3.286-2.012-9.608 5.585-19.257 23.138m178.116 8.755c-47.058 40.072-44.179 41.765 45.52 26.761 8.352-1.397 10.176-.889 6 1.671-3.3 2.023-27.6 6.735-54 10.471-59.576 8.43-53.48-2.339-54.84 96.88l-1.16 84.6 10.877-6.43c5.982-3.537 10.194-7.114 9.359-7.948-.835-.835 20.553-35.13 47.529-76.211 57.798-88.02 61.073-93.746 54.809-95.834-6.667-2.222-5.599-8.858 1.426-8.858 8.814 0 7.469-6.312-6.923-32.493-16.217-29.497-15.114-29.636-58.597 7.391M10.316 139.489c-1.371 2.219.939 7.291 5.134 11.273 4.196 3.981 15.486 16.398 25.089 27.593C92.117 238.484 140.91 292 144.153 292c3.177 0-28.76-53.245-40.041-66.755-5.318-6.37-32.442-49.301-40.787-64.558-4.781-8.74-11.38-13.47-23.25-16.667-9.117-2.455-18.981-5.386-21.921-6.514-2.939-1.128-6.467-.236-7.838 1.983m352.939 3.821C346.065 149.445 320 175.954 320 187.302c0 4.451-31.767 49.864-37.519 53.637-2.465 1.616-3.113 2.966-1.44 3 1.672.033-3.551 9.988-11.607 22.121-33.436 50.36-6.59 24.004 97.718-95.933 30.446-35.007 29.884-38.873-3.897-26.817" fill-rule="evenodd"/></svg>不僅僅支持內(nèi)嵌，我們也可以將樣式進(jìn)行外聯(lián)操作：

<svg id="svg" xmlns="http://www.w3.org/2000/svg" width="400" height="344" viewBox="-10 0 425 369"> <style> #path{fill:#231f20;stroke:none;} #svg{background-color:#dedede} </style> <path id="path" d="M108.731 4.224c-5.097 2.044-13.302 4.448-18.232 5.342C74.059 12.548 20 32.992 20 36.228c0 3.085 25.52 16.117 57.488 29.357 22.898 9.483 222.126 9.483 245.024 0C354.48 52.345 380 39.313 380 36.228c0-3.253-54.096-23.687-70.663-26.691-5.021-.911-13.792-3.429-19.493-5.596-13.064-4.967-168.627-4.724-181.113.283M8 48.043c0 1.917 1.745 4.563 3.878 5.882 2.133 1.318 12.366 18.074 22.741 37.236 10.374 19.161 20.693 36.07 22.931 37.575 4.769 3.207 11.4.038 8.783-4.197-.989-1.6 3.291-12.214 9.51-23.587C88.818 77.225 89.097 77.722 54 61.968 23.556 48.302 8 43.593 8 48.043M344.002 62.66c-16.498 7.701-30.539 14.544-31.202 15.207-1.381 1.381 22.346 46.434 27.1 51.455 1.729 1.827 9.039-7.173 16.243-20C363.347 96.495 371.941 82.85 375.241 79c3.299-3.85 4.774-7 3.276-7-1.497 0 .07-5.4 3.483-12 8.403-16.25 1.474-15.765-37.998 2.66m37.606 16.215c-30.721 50.032-31.314 60.191-3.03 51.963l19.422-5.65 1.188-29.206c1.51-37.145-2.738-41.278-17.58-17.107M2.521 73C1.195 77.95.085 92.215.055 104.699L0 127.398l20.74 6.08c28.87 8.463 29.274 6.83 8.326-33.606C9.326 61.767 6.341 58.746 2.521 73m110.146 10.683C114.729 89.379 195.183 156 200 156c4.817 0 85.271-66.621 87.333-72.317C288.12 81.51 252.327 80 200 80s-88.12 1.51-87.333 3.683m-30.303 26.46C66.423 139.145 65.223 144 74 144c3.3 0 6 1.8 6 4s-1.993 4-4.428 4c-6.934 0-1.717 9.949 35.654 68 53.738 83.475 79.385 120.055 82.199 117.241 3.682-3.681 3.198-168.384-.501-170.67-1.692-1.045-24.642-4.975-51-8.732C115.566 154.083 91.3 149.353 88 147.33c-4.176-2.56-2.352-3.068 6-1.671 45.724 7.648 75.402 10.539 78.312 7.629 2.804-2.804-53.996-56.062-70.691-66.283-3.286-2.012-9.608 5.585-19.257 23.138m178.116 8.755c-47.058 40.072-44.179 41.765 45.52 26.761 8.352-1.397 10.176-.889 6 1.671-3.3 2.023-27.6 6.735-54 10.471-59.576 8.43-53.48-2.339-54.84 96.88l-1.16 84.6 10.877-6.43c5.982-3.537 10.194-7.114 9.359-7.948-.835-.835 20.553-35.13 47.529-76.211 57.798-88.02 61.073-93.746 54.809-95.834-6.667-2.222-5.599-8.858 1.426-8.858 8.814 0 7.469-6.312-6.923-32.493-16.217-29.497-15.114-29.636-58.597 7.391M10.316 139.489c-1.371 2.219.939 7.291 5.134 11.273 4.196 3.981 15.486 16.398 25.089 27.593C92.117 238.484 140.91 292 144.153 292c3.177 0-28.76-53.245-40.041-66.755-5.318-6.37-32.442-49.301-40.787-64.558-4.781-8.74-11.38-13.47-23.25-16.667-9.117-2.455-18.981-5.386-21.921-6.514-2.939-1.128-6.467-.236-7.838 1.983m352.939 3.821C346.065 149.445 320 175.954 320 187.302c0 4.451-31.767 49.864-37.519 53.637-2.465 1.616-3.113 2.966-1.44 3 1.672.033-3.551 9.988-11.607 22.121-33.436 50.36-6.59 24.004 97.718-95.933 30.446-35.007 29.884-38.873-3.897-26.817" fill-rule="evenodd"/></svg>

暗黑模式

通過在樣式中添加媒體查詢，我們可以為svg的圖標(biāo)添加“暗黑模式”，首先創(chuàng)建好光明模式：

<svg id="svg" xmlns="http://www.w3.org/2000/svg" width="400" height="344" viewBox="-10 0 425 369"> <style> #path{fill:#231f20;stroke:none;} #svg{background-color:#dedede} </style> <path id="path" d="M108.731 4.224c-5.097 2.044-13.302 4.448-18.232 5.342C74.059 12.548 20 32.992 20 36.228c0 3.085 25.52 16.117 57.488 29.357 22.898 9.483 222.126 9.483 245.024 0C354.48 52.345 380 39.313 380 36.228c0-3.253-54.096-23.687-70.663-26.691-5.021-.911-13.792-3.429-19.493-5.596-13.064-4.967-168.627-4.724-181.113.283M8 48.043c0 1.917 1.745 4.563 3.878 5.882 2.133 1.318 12.366 18.074 22.741 37.236 10.374 19.161 20.693 36.07 22.931 37.575 4.769 3.207 11.4.038 8.783-4.197-.989-1.6 3.291-12.214 9.51-23.587C88.818 77.225 89.097 77.722 54 61.968 23.556 48.302 8 43.593 8 48.043M344.002 62.66c-16.498 7.701-30.539 14.544-31.202 15.207-1.381 1.381 22.346 46.434 27.1 51.455 1.729 1.827 9.039-7.173 16.243-20C363.347 96.495 371.941 82.85 375.241 79c3.299-3.85 4.774-7 3.276-7-1.497 0 .07-5.4 3.483-12 8.403-16.25 1.474-15.765-37.998 2.66m37.606 16.215c-30.721 50.032-31.314 60.191-3.03 51.963l19.422-5.65 1.188-29.206c1.51-37.145-2.738-41.278-17.58-17.107M2.521 73C1.195 77.95.085 92.215.055 104.699L0 127.398l20.74 6.08c28.87 8.463 29.274 6.83 8.326-33.606C9.326 61.767 6.341 58.746 2.521 73m110.146 10.683C114.729 89.379 195.183 156 200 156c4.817 0 85.271-66.621 87.333-72.317C288.12 81.51 252.327 80 200 80s-88.12 1.51-87.333 3.683m-30.303 26.46C66.423 139.145 65.223 144 74 144c3.3 0 6 1.8 6 4s-1.993 4-4.428 4c-6.934 0-1.717 9.949 35.654 68 53.738 83.475 79.385 120.055 82.199 117.241 3.682-3.681 3.198-168.384-.501-170.67-1.692-1.045-24.642-4.975-51-8.732C115.566 154.083 91.3 149.353 88 147.33c-4.176-2.56-2.352-3.068 6-1.671 45.724 7.648 75.402 10.539 78.312 7.629 2.804-2.804-53.996-56.062-70.691-66.283-3.286-2.012-9.608 5.585-19.257 23.138m178.116 8.755c-47.058 40.072-44.179 41.765 45.52 26.761 8.352-1.397 10.176-.889 6 1.671-3.3 2.023-27.6 6.735-54 10.471-59.576 8.43-53.48-2.339-54.84 96.88l-1.16 84.6 10.877-6.43c5.982-3.537 10.194-7.114 9.359-7.948-.835-.835 20.553-35.13 47.529-76.211 57.798-88.02 61.073-93.746 54.809-95.834-6.667-2.222-5.599-8.858 1.426-8.858 8.814 0 7.469-6.312-6.923-32.493-16.217-29.497-15.114-29.636-58.597 7.391M10.316 139.489c-1.371 2.219.939 7.291 5.134 11.273 4.196 3.981 15.486 16.398 25.089 27.593C92.117 238.484 140.91 292 144.153 292c3.177 0-28.76-53.245-40.041-66.755-5.318-6.37-32.442-49.301-40.787-64.558-4.781-8.74-11.38-13.47-23.25-16.667-9.117-2.455-18.981-5.386-21.921-6.514-2.939-1.128-6.467-.236-7.838 1.983m352.939 3.821C346.065 149.445 320 175.954 320 187.302c0 4.451-31.767 49.864-37.519 53.637-2.465 1.616-3.113 2.966-1.44 3 1.672.033-3.551 9.988-11.607 22.121-33.436 50.36-6.59 24.004 97.718-95.933 30.446-35.007 29.884-38.873-3.897-26.817" fill-rule="evenodd"/></svg>這里，背景色為白色，前景色為黑色：







隨后添加暗黑模式：

<svg id="svg" xmlns="http://www.w3.org/2000/svg" width="400" height="344" viewBox="-10 0 425 369"> <style> #path{fill:#231f20;stroke:none;} #svg{background-color:#dedede} @media (prefers-color-scheme: dark) { #path{fill:#dedede;stroke:none;} #svg{background-color:#231f20} } </style> <path id="path" d="M108.731 4.224c-5.097 2.044-13.302 4.448-18.232 5.342C74.059 12.548 20 32.992 20 36.228c0 3.085 25.52 16.117 57.488 29.357 22.898 9.483 222.126 9.483 245.024 0C354.48 52.345 380 39.313 380 36.228c0-3.253-54.096-23.687-70.663-26.691-5.021-.911-13.792-3.429-19.493-5.596-13.064-4.967-168.627-4.724-181.113.283M8 48.043c0 1.917 1.745 4.563 3.878 5.882 2.133 1.318 12.366 18.074 22.741 37.236 10.374 19.161 20.693 36.07 22.931 37.575 4.769 3.207 11.4.038 8.783-4.197-.989-1.6 3.291-12.214 9.51-23.587C88.818 77.225 89.097 77.722 54 61.968 23.556 48.302 8 43.593 8 48.043M344.002 62.66c-16.498 7.701-30.539 14.544-31.202 15.207-1.381 1.381 22.346 46.434 27.1 51.455 1.729 1.827 9.039-7.173 16.243-20C363.347 96.495 371.941 82.85 375.241 79c3.299-3.85 4.774-7 3.276-7-1.497 0 .07-5.4 3.483-12 8.403-16.25 1.474-15.765-37.998 2.66m37.606 16.215c-30.721 50.032-31.314 60.191-3.03 51.963l19.422-5.65 1.188-29.206c1.51-37.145-2.738-41.278-17.58-17.107M2.521 73C1.195 77.95.085 92.215.055 104.699L0 127.398l20.74 6.08c28.87 8.463 29.274 6.83 8.326-33.606C9.326 61.767 6.341 58.746 2.521 73m110.146 10.683C114.729 89.379 195.183 156 200 156c4.817 0 85.271-66.621 87.333-72.317C288.12 81.51 252.327 80 200 80s-88.12 1.51-87.333 3.683m-30.303 26.46C66.423 139.145 65.223 144 74 144c3.3 0 6 1.8 6 4s-1.993 4-4.428 4c-6.934 0-1.717 9.949 35.654 68 53.738 83.475 79.385 120.055 82.199 117.241 3.682-3.681 3.198-168.384-.501-170.67-1.692-1.045-24.642-4.975-51-8.732C115.566 154.083 91.3 149.353 88 147.33c-4.176-2.56-2.352-3.068 6-1.671 45.724 7.648 75.402 10.539 78.312 7.629 2.804-2.804-53.996-56.062-70.691-66.283-3.286-2.012-9.608 5.585-19.257 23.138m178.116 8.755c-47.058 40.072-44.179 41.765 45.52 26.761 8.352-1.397 10.176-.889 6 1.671-3.3 2.023-27.6 6.735-54 10.471-59.576 8.43-53.48-2.339-54.84 96.88l-1.16 84.6 10.877-6.43c5.982-3.537 10.194-7.114 9.359-7.948-.835-.835 20.553-35.13 47.529-76.211 57.798-88.02 61.073-93.746 54.809-95.834-6.667-2.222-5.599-8.858 1.426-8.858 8.814 0 7.469-6.312-6.923-32.493-16.217-29.497-15.114-29.636-58.597 7.391M10.316 139.489c-1.371 2.219.939 7.291 5.134 11.273 4.196 3.981 15.486 16.398 25.089 27.593C92.117 238.484 140.91 292 144.153 292c3.177 0-28.76-53.245-40.041-66.755-5.318-6.37-32.442-49.301-40.787-64.558-4.781-8.74-11.38-13.47-23.25-16.667-9.117-2.455-18.981-5.386-21.921-6.514-2.939-1.128-6.467-.236-7.838 1.983m352.939 3.821C346.065 149.445 320 175.954 320 187.302c0 4.451-31.767 49.864-37.519 53.637-2.465 1.616-3.113 2.966-1.44 3 1.672.033-3.551 9.988-11.607 22.121-33.436 50.36-6.59 24.004 97.718-95.933 30.446-35.007 29.884-38.873-3.897-26.817" fill-rule="evenodd"/></svg>





顏色正好相反，背景色為黑色，前景色為白色，動(dòng)態(tài)切換效果是這樣的：







這細(xì)節(jié)，也是沒誰(shuí)了。

Safari

沒錯(cuò)，又是Safari，來看看svg格式的Favicon支持列表：

SVG Favicons on IE is fully supported on None of the versions, partially supported on None of the versions, and not supported on 5.5-11 IE versions.
SVG Favicons on Edge is fully supported on 80-99, partially supported on None of the versions, and not supported on 12-79 Edge versions.
SVG Favicons on Firefox is fully supported on 41-100, partially supported on 4-40, and not supported on 2-3 Firefox versions.
SVG Favicons on Chrome is fully supported on 80-103, partially supported on None of the versions, and not supported on 4-79 Chrome versions.
SVG Favicons on Safari is fully supported on None of the versions, partially supported on None of the versions, and not supported on 3.2-15.4 Safari versions.
SVG Favicons on Opera is fully supported on 44-83, partially supported on None of the versions, and not supported on 9.5-66 Opera versions.
SVG Favicons on Safari on iOS is fully supported on None of the versions, partially supported on None of the versions, and not supported on 3.2-15.4 Safari on iOS versions.
SVG Favicons on Android Browser is fully supported on None of the versions, partially supported on None of the versions, and not supported on 2.3-99 Android Browser versions.
SVG Favicons on Opera Mobile is fully supported on None of the versions, partially supported on None of the versions, and not supported on 10-64 Opera Mobile versions.
SVG Favicons on Chrome for Android is fully supported on 97-100, partially supported on None of the versions, and not supported on below 97 Chrome for Android versions.
SVG Favicons on Firefox for Android is fully supported on None of the versions, partially supported on None of the versions, and not supported on 95-98 Firefox for Android versions.
SVG Favicons on Samsung Internet is fully supported on 13-16, partially supported on None of the versions, and not supported on 4-12 Samsung Internet versions.

連三星瀏覽器都支持了，然而，只有Safari不支持，不愧是蘋果生態(tài)圈，可謂獨(dú)領(lǐng)風(fēng)騷，無出其右。

嘗試蘋果獨(dú)有的mask-icon的聲明方式另辟蹊徑：

<link rel="mask-icon" href="/favicon.svg" color="#990000">但這樣的聲明方式只支持單色的svg文件，同時(shí)也無法使用媒體查詢的特性來控制圖標(biāo)顏色模式，所以，很明顯，mask-icon是雞肋，味同嚼蠟，蠟要沿著嘴角流下來了。

事實(shí)上，就算是蘋果官網(wǎng)http://apple.com，也并沒有使用mask-icon，就算坐等Safari支持原生svg favicon，蘋果最快也要每六個(gè)月左右才更新一次 Safari，那時(shí)候，黃花菜都涼了。

除此之外，在Safari中調(diào)試svg的favicon也是令人痛苦的，需要走下面的流程：

1、退出Safari.
2、進(jìn)入~/Library/Safari/Favicon Cache/目錄
3、刪除所有文件
4、進(jìn)入~/Library/Safari/Touch Icons Cache/目錄，重復(fù)第三步
5、進(jìn)入~/Library/Safari/Template Icons/目錄，重復(fù)第三步
6、清空廢紙簍
7、再次打開Safari

才能查看Safari下最新的Favicon效果。

結(jié)語(yǔ)

鵪鶉嗉里尋豌豆，鷺鷥腿上劈精肉，于細(xì)枝末節(jié)處雕花，見微知著，對(duì)著favicon一番把玩之后，favicon.ico文件最好留著別刪，因?yàn)橐苍S還會(huì)有人在用IE訪問您的站點(diǎn)也未可知，最后，代碼開源于https://github.com/zcxey2911/svg_website_logo，聊博諸君一曬。

原文轉(zhuǎn)載自「劉悅的技術(shù)博客」 https://v3u.cn/a_id_215