简单的 JS

使用以下简短的函数ImgToSvg将img转换为svg(包括类列表)

<img src="logo.svg" onload="ImgToSvg(this)" class="logo-img"/>

const ImgToSvg= async (img) => { const s = document.createElement('div'); s.innerHTML = await (await fetch(img.src)).text(); s.firstChild.classList = img.classList; img.replaceWith(s.firstChild) } .logo-img { fill: yellow; } <img onload="ImgToSvg(this)" class="logo-img" src="data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMzAwIiBoZWlnaHQ9IjMwMCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj48cmVjdCB4PSIyIiB5PSIyIiB3aWR0aD0iMjk2IiBoZWlnaHQ9IjI5NiIgc3R5bGU9InN0cm9rZTojNTU1NTU1O3N0cm9rZS13aWR0aDoyIi8+PHRleHQgeD0iNTAlIiB5PSI1MCUiIGZvbnQtc2l6ZT0iMTgiIHRleHQtYW5jaG9yPSJtaWRkbGUiIGFsaWdubWVudC1iYXNlbGluZT0ibWlkZGxlIiBmb250LWZhbWlseT0ibW9ub3NwYWNlLCBzYW5zLXNlcmlmIiBmaWxsPSIjNTU1NTU1Ij4zMDAmIzIxNTszMDA8L3RleHQ+PC9zdmc+" /> <!-- in this snippet I use dataURI in img src to avoid CORS problems witch reading svg data from external source by js -->

这是对Waruyama answer的改进，提供了简短的js函数

来自@Praveen的答案是可靠的。

我不能让它在我的工作中响应，所以我为它做了一个jquery悬停函数。

CSS

.svg path {
   transition:0.3s all !important;
}

JS / JQuery

// code from above wrapped into a function
replaceSVG();

// hover function
// hover over an element, and find the SVG that you want to change
$('.element').hover(function() {
    var el = $(this);
    var svg = el.find('svg path');
    svg.attr('fill', '#CCC');
}, function() {
    var el = $(this);
    var svg = el.find('svg path');
    svg.attr('fill', '#3A3A3A');
});

尝试纯CSS:

.logo-img {
  /* to black */
  filter: invert(1);
  /* or to blue */
  filter: invert(0.5) sepia(1) saturate(5) hue-rotate(175deg);
}

更多信息请参见本文https://blog.union.io/code/2017/08/10/img-svg-fill/

这是一个老问题，但最近我们遇到了同样的问题，我们从服务器端解决了它。这是一个php特定的答案，但我肯定其他envs有类似的东西。 您从一开始就将SVG呈现为SVG，而不是使用img标记。

public static function print_svg($file){
    $iconfile = new \DOMDocument();
    $iconfile->load($file);
    $tag = $iconfile->saveHTML($iconfile->getElementsByTagName('svg')[0]);
    return $tag;
}

现在呈现文件时，您将得到完整的内联SVG

我只想改变特定的路径和/或颜色，甚至不同的路径上色。此外，在我的情况下，一些CSS被应用到img标签直接，因此我想让它是原始的img元素，而不是混乱的定位和对齐。

感谢这个答案的启发:https://stackoverflow.com/a/43015413/1444589，这对我来说很有效:

let img = document.querySelector('img[class^="YourClassName"]');
let imgURL = img.src;

fetch(imgURL)
  .then(response => response.text())
  .then(text => {
    let parser = new DOMParser();
    let xmlDoc = parser.parseFromString(text, 'text/xml');
    let svg = xmlDoc.getElementsByTagName('svg')[0];
    let paths = xmlDoc.getElementsByTagName('path');

    // access individual path elements directly
    let leftShape = paths[0];
    leftShape.setAttribute('fill', '#4F4F4F');

    // or find specific color
    const pathsArr = Array.from(paths);
    let skirtShape = pathsArr.find(path => path.getAttribute('fill') === '#F038A5');
    skirtShape.setAttribute('fill', '#0078D6');

    // Replace old SVG with colorized SVG
    // positioning and alignment is left untouched
    let base64Str = btoa(new XMLSerializer().serializeToString(svg));
    img.src = 'data:image/svg+xml;base64, ' + base64Str;
  });

这对于想要使用CSS操作的PHP和.svg图像组合使用的人可能很有帮助。

你不能用CSS覆盖img标签内的属性。但是当svg源代码嵌入到HTML中时，你当然可以。我喜欢用require_once函数来解决这个问题，其中包含一个.svg.php文件。这就像导入一个图像，但你仍然可以用CSS覆盖样式!

首先包含svg文件:

<?php require_once( '/assets/images/my-icon.svg.php' ); ?>

它包括这个图标，例如:

<svg xmlns="http://www.w3.org/2000/svg" width="20.666" height="59.084" viewBox="0 0 20.666 59.084"><g transform="translate(-639.749 -3139)"><path d="M648.536,3173.876c0-2.875-1.725-3.8-3.471-3.8-1.683,0-3.49.9-3.49,3.8,0,3,1.786,3.8,3.49,3.8C646.811,3177.676,648.536,3176.769,648.536,3173.876Zm-3.471,2.341c-.883,0-1.437-.513-1.437-2.341,0-1.971.615-2.381,1.437-2.381.862,0,1.438.349,1.438,2.381,0,1.907-.616,2.339-1.438,2.339Z" fill="#142312"/><path d="M653.471,3170.076a1.565,1.565,0,0,0-1.416.9l-6.558,13.888h1.2a1.565,1.565,0,0,0,1.416-.9l6.559-13.887Z" fill="#142312"/><path d="M655.107,3177.263c-1.684,0-3.471.9-3.471,3.8,0,3,1.766,3.8,3.471,3.8,1.745,0,3.49-.9,3.49-3.8C658.6,3178.186,656.851,3177.263,655.107,3177.263Zm0,6.139c-.884,0-1.438-.514-1.438-2.34,0-1.972.617-2.381,1.438-2.381.862,0,1.437.349,1.437,2.381,0,1.909-.616,2.34-1.437,2.34Z" fill="#142312"/><path d="M656.263,3159.023l-1.49-14.063a1.35,1.35,0,0,0,.329-.293,1.319,1.319,0,0,0,.268-1.123l-.753-3.49a1.328,1.328,0,0,0-1.306-1.054h-6.448a1.336,1.336,0,0,0-1.311,1.068l-.71,3.493a1.344,1.344,0,0,0,.276,1.112,1.532,1.532,0,0,0,.283.262l-1.489,14.087c-1.7,1.727-4.153,4.871-4.153,8.638v28.924a1.339,1.339,0,0,0,1.168,1.49,1.357,1.357,0,0,0,.17.01h17.981a1.366,1.366,0,0,0,1.337-1.366v-29.059C660.414,3163.893,657.963,3160.749,656.263,3159.023Zm-8.307-17.349h4.274l.176.815H647.79Zm9.785,43.634v10.1H642.434v-17.253a4.728,4.728,0,0,1-2.028-4.284,4.661,4.661,0,0,1,2.028-4.215v-2c0-3.162,2.581-5.986,3.687-7.059a1.356,1.356,0,0,0,.4-.819l1.542-14.614H652.1l1.545,14.618a1.362,1.362,0,0,0,.4.819c1.109,1.072,3.688,3.9,3.688,7.059v9.153a5.457,5.457,0,0,1,0,8.5Z" fill="#142312"/></g></svg>

现在我们可以像这样用CSS简单地改变填充颜色:

svg path {
  fill: blue;
}

我首先尝试用file_get_contents()解决这个问题，但上面的解决方案要快得多。