feat(tailwind): dynamic icon selectors

plugins/tailwind/src/iconify.ts

@@ -148,3 +148,47 @@ export function getCSSRules(
 
 	return rules;
 }
+
+/**
+ * Get dynamic CSS rule
+ */
+export function getDynamicCSSRules(
+	selector: string,
+	icon: string,
+	options: IconifyPluginOptions = {}
+): Record<string, string> {
+	const nameParts = icon.split('--');
+	let nameError = `Invalid icon name: "${icon}"`;
+	if (nameParts.length !== 2) {
+		if (nameParts.length === 1 && icon.indexOf(':') !== -1) {
+			nameError += `. "{prefix}:{name}" is not supported because of Tailwind limitations, use "{prefix}--{name}" (use double dash!) instead.`;
+		}
+		throw new Error(nameError);
+	}
+
+	const [prefix, name] = nameParts;
+	if (!prefix.match(matchIconName) || !name.match(matchIconName)) {
+		throw new Error(nameError);
+	}
+
+	const iconSet = loadIconSet(prefix, options);
+	if (!iconSet) {
+		throw new Error(`Cannot load icon set for "${prefix}"`);
+	}
+
+	console.log('Selector:', selector);
+	const generated = getIconsCSSData(iconSet, [name], {
+		...options,
+		// One selector
+		iconSelector: selector,
+		commonSelector: selector,
+		overrideSelector: selector,
+	});
+	if (generated.css.length !== 1) {
+		throw new Error(`Something went wrong generating "${icon}"`);
+	}
+	return {
+		...(generated.common?.rules || {}),
+		...generated.css[0].rules,
+	};
+}

plugins/tailwind/src/options.ts

@@ -8,11 +8,22 @@ export interface IconifyPluginFileOptions {
 	files?: Record<string, string>;
 }
 
+/**
+ * Options for matching dynamic icon names
+ */
+export interface IconifyPluginDynamicPrefixOptions {
+	// Dynamic prefix for selectors. Default is `icon`
+	// Allows using icon names like `<span class="icon[mdi--home]"></span>
+	// Where prefix and name are separated by '--' because Tailwind does not allow ':'
+	dynamicPrefix?: string;
+}
+
 /**
  * All options
  */
 export interface IconifyPluginOptions
 	extends IconCSSIconSetOptions,
+		IconifyPluginDynamicPrefixOptions,
 		IconifyPluginFileOptions {
 	//
 }

plugins/tailwind/src/plugin.ts

@@ -1,17 +1,41 @@
 import plugin from 'tailwindcss/plugin';
-import { getCSSRules } from './iconify';
+import { getCSSRules, getDynamicCSSRules } from './iconify';
 import type { IconifyPluginOptions } from './options';
 
 /**
  * Iconify plugin
  */
 function iconifyPlugin(
-	icons: string[] | string,
-	options: IconifyPluginOptions = {}
+	icons?: string[] | string,
+	options?: IconifyPluginOptions
 ) {
-	const rules = getCSSRules(icons, options);
-	return plugin(({ addUtilities }) => {
-		addUtilities(rules);
+	const passedOptions =
+		typeof icons === 'object' && !(icons instanceof Array)
+			? icons
+			: options || {};
+	const passedIcons =
+		typeof icons !== 'object' || icons instanceof Array ? icons : void 0;
+
+	// Get selector for dynamic classes
+	const dynamicSelector = passedOptions.dynamicPrefix || 'icon';
+
+	// Get hardcoded list of icons
+	const rules = passedIcons
+		? getCSSRules(passedIcons, passedOptions)
+		: void 0;
+
+	return plugin(({ addUtilities, matchComponents }) => {
+		if (rules) {
+			addUtilities(rules);
+		}
+		matchComponents({
+			[dynamicSelector]: (icon: string) =>
+				getDynamicCSSRules(
+					`.${dynamicSelector}-[${icon}]`,
+					icon,
+					passedOptions
+				),
+		});
 	});
 }