80 lines
2.5 KiB
JavaScript
80 lines
2.5 KiB
JavaScript
/**
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* jQuery module to work with SVG attributes
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* @module jQueryAttr
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* @license MIT
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*/
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/**
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* This fixes `$(...).attr()` to work as expected with SVG elements.
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* Does not currently use `*AttributeNS()` since we rarely need that.
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* Adds {@link external:jQuery.fn.attr}.
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* See {@link https://api.jquery.com/attr/} for basic documentation of `.attr()`.
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*
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* Additional functionality:
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* - When getting attributes, a string that's a number is returned as type number.
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* - If an array is supplied as the first parameter, multiple values are returned
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* as an object with values for each given attribute.
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* @function module:jQueryAttr.jQueryAttr
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* @param {external:jQuery} $ The jQuery object to which to add the plug-in
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* @returns {external:jQuery}
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*/
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export default function jQueryPluginSVG ($) {
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const proxied = $.fn.attr,
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svgns = 'http://www.w3.org/2000/svg';
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/**
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* @typedef {PlainObject.<string, string|Float>} module:jQueryAttr.Attributes
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*/
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/**
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* @function external:jQuery.fn.attr
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* @param {string|string[]|PlainObject.<string, string>} key
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* @param {string} value
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* @returns {external:jQuery|module:jQueryAttr.Attributes}
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*/
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$.fn.attr = function (key, value) {
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const len = this.length;
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if (!len) { return proxied.call(this, key, value); }
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for (let i = 0; i < len; ++i) {
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const elem = this[i];
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// set/get SVG attribute
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if (elem.namespaceURI === svgns) {
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// Setting attribute
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if (value !== undefined) {
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elem.setAttribute(key, value);
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} else if (Array.isArray(key)) {
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// Getting attributes from array
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const obj = {};
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let j = key.length;
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while (j--) {
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const aname = key[j];
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let attr = elem.getAttribute(aname);
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// This returns a number when appropriate
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if (attr || attr === '0') {
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attr = isNaN(attr) ? attr : (attr - 0);
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}
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obj[aname] = attr;
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}
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return obj;
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}
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if (typeof key === 'object') {
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// Setting attributes from object
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for (const [name, val] of Object.entries(key)) {
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elem.setAttribute(name, val);
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}
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// Getting attribute
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} else {
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let attr = elem.getAttribute(key);
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if (attr || attr === '0') {
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attr = isNaN(attr) ? attr : (attr - 0);
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}
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return attr;
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}
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} else {
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return proxied.call(this, key, value);
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}
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}
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return this;
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};
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return $;
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}
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