加载jquery.svg.js后，必须加载这个文件:http://keith-wood.name/js/jquery.svgdom.js。

来源:http://keith-wood.name/svg.html dom

工作示例:http://jsfiddle.net/74RbC/99/

这里是我的相当不优雅，但工作的代码，处理以下问题(没有任何依赖):

IE中<svg>元素上不存在classList className不代表IE中<svg>元素上的class属性 旧IE的破碎的getAttribute()和setAttribute()实现

它尽可能使用classList。

代码:

var classNameContainsClass = function(fullClassName, className) {
    return !!fullClassName &&
           new RegExp("(?:^|\\s)" + className + "(?:\\s|$)").test(fullClassName);
};

var hasClass = function(el, className) {
    if (el.nodeType !== 1) {
        return false;
    }
    if (typeof el.classList == "object") {
        return (el.nodeType == 1) && el.classList.contains(className);
    } else {
        var classNameSupported = (typeof el.className == "string");
        var elClass = classNameSupported ? el.className : el.getAttribute("class");
        return classNameContainsClass(elClass, className);
    }
};

var addClass = function(el, className) {
    if (el.nodeType !== 1) {
        return;
    }
    if (typeof el.classList == "object") {
        el.classList.add(className);
    } else {
        var classNameSupported = (typeof el.className == "string");
        var elClass = classNameSupported ?
            el.className : el.getAttribute("class");
        if (elClass) {
            if (!classNameContainsClass(elClass, className)) {
                elClass += " " + className;
            }
        } else {
            elClass = className;
        }
        if (classNameSupported) {
            el.className = elClass;
        } else {
            el.setAttribute("class", elClass);
        }
    }
};

var removeClass = (function() {
    function replacer(matched, whiteSpaceBefore, whiteSpaceAfter) {
        return (whiteSpaceBefore && whiteSpaceAfter) ? " " : "";
    }

    return function(el, className) {
        if (el.nodeType !== 1) {
            return;
        }
        if (typeof el.classList == "object") {
            el.classList.remove(className);
        } else {
            var classNameSupported = (typeof el.className == "string");
            var elClass = classNameSupported ?
                el.className : el.getAttribute("class");
            elClass = elClass.replace(new RegExp("(^|\\s)" + className + "(\\s|$)"), replacer);
            if (classNameSupported) {
                el.className = elClass;
            } else {
                el.setAttribute("class", elClass);
            }
        }
    }; //added semicolon here
})();

使用示例:

var el = document.getElementById("someId");
if (hasClass(el, "someClass")) {
    removeClass(el, "someClass");
}
addClass(el, "someOtherClass");

基于以上答案，我创建了以下API

/*
 * .addClassSVG(className)
 * Adds the specified class(es) to each of the set of matched SVG elements.
 */
$.fn.addClassSVG = function(className){
    $(this).attr('class', function(index, existingClassNames) {
        return ((existingClassNames !== undefined) ? (existingClassNames + ' ') : '') + className;
    });
    return this;
};

/*
 * .removeClassSVG(className)
 * Removes the specified class to each of the set of matched SVG elements.
 */
$.fn.removeClassSVG = function(className){
    $(this).attr('class', function(index, existingClassNames) {
        var re = new RegExp('\\b' + className + '\\b', 'g');
        return existingClassNames.replace(re, '');
    });
    return this;
};

jQuery 2.2支持SVG类操作

jQuery 2.2和1.12发布的帖子包括以下引用:

While jQuery is a HTML library, we agreed that class support for SVG elements could be useful. Users will now be able to call the .addClass(), .removeClass(), .toggleClass(), and .hasClass() methods on SVG. jQuery now changes the class attribute rather than the className property. This also makes the class methods usable in general XML documents. Keep in mind that many other things will not work with SVG, and we still recommend using a library dedicated to SVG if you need anything beyond class manipulation.

jQuery 2.2.0示例

它测试:

.addClass（） .removeClass（） .hasClass（）

如果你点击那个小方块，它会改变它的颜色，因为class属性被添加/删除了。

$ (" # x”).click(函数(){ if ($(this).hasClass("clicked")) { (美元).removeClass(“点击”); }其他{ (美元).addClass(“点击”); ｝ })； .clicked { 填充:红色!重要; ｝ < html > < >头 < script src = " https://code.jquery.com/jquery-2.2.0.js " > < /脚本> > < /头 身体< > <svg width="80" height="80"> <rect id="x" width="80" height="80" style="fill:rgb(0,0,255)"/> < / svg > 身体< / > < / html >

我使用Snap.svg向SVG添加一个类。

var jimmy = Snap(" .jimmy ")

jimmy.addClass("exampleClass");

http://snapsvg.io/docs/#Element.addClass

如果你有动态类或者不知道什么类可以被应用，那么我认为这个方法是最好的方法:

// addClass
$('path').attr('class', function(index, classNames) {
    return classNames + ' class-name';
});

// removeClass
$('path').attr('class', function(index, classNames) {
    return classNames.replace('class-name', '');
});