templateUtil.js
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templateUtil.js
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	/**
	* @module templateUtil
	* @private
	*/

	/**
	* @param {string} str
	* @return {string} The string with any HTML entities escaped.
	*/
	export function escapeHTML( str ) {
	return mw.html.escape( str );
	}

	const templates = {};
	/**
	* @param {string} html markup of the template
	* @return {HTMLElement} a cloned root element of the template
	*/
	export function createNodeFromTemplate( html ) {
	if ( !templates[ html ] ) {
	// TODO: use <template> element when IE11 dies
	const div = document.createElement( 'div' );
	div.innerHTML = html;
	templates[ html ] = div.firstElementChild;
	}

	return templates[ html ].cloneNode( true );
	}