Utility to populate templates for pre-ES2015 backticks

template.js

/*
* str = 'I went to the {{location}} and found {{item}}';
* obj = {location : 'store', item : 'milk'};
*/
function getFilledTplObj(str,obj){
	function replacer() {
		return obj[arguments[1]];
	}
	return str.replace(/{{([^}}]+)?}}/g, replacer);
}