Function Plugin

plugin/markdown/plugin.js:30–485

()

};

const Plugin = () => {

	// The reveal.js instance this plugin is attached to
	let deck;
	let markedInstance = null;

	/**
	 * Retrieves the markdown contents of a slide section
	 * element. Normalizes leading tabs/whitespace.
	 */
	function getMarkdownFromSlide( section ) {

		// look for a <script> or <textarea data-template> wrapper
		const template = section.querySelector( '[data-template]' ) || section.querySelector( 'script' );

		// strip leading whitespace so it isn't evaluated as code
		let text = ( template || section ).textContent;

		// restore script end tags
		text = text.replace( new RegExp( SCRIPT_END_PLACEHOLDER, 'g' ), '</script>' );

		const leadingWs = text.match( /^\n?(\s*)/ )[1].length,
			leadingTabs = text.match( /^\n?(\t*)/ )[1].length;

		if( leadingTabs > 0 ) {
			text = text.replace( new RegExp('\\n?\\t{' + leadingTabs + '}(.*)','g'), function(m, p1) { return '\n' + p1 ; } );
		}
		else if( leadingWs > 1 ) {
			text = text.replace( new RegExp('\\n? {' + leadingWs + '}(.*)', 'g'), function(m, p1) { return '\n' + p1 ; } );
		}

		return text;

	}

	/**
	 * Given a markdown slide section element, this will
	 * return all arguments that aren't related to markdown
	 * parsing. Used to forward any other user-defined arguments
	 * to the output markdown slide.
	 */
	function getForwardedAttributes( section ) {

		const attributes = section.attributes;
		const result = [];

		for( let i = 0, len = attributes.length; i < len; i++ ) {
			const name = attributes[i].name,
				value = attributes[i].value;

			// disregard attributes that are used for markdown loading/parsing
			if( /data\-(markdown|separator|vertical|notes)/gi.test( name ) ) continue;

			if( value ) {
				result.push( name + '="' + value + '"' );
			}
			else {
				result.push( name );