js/plugins/highchart/modules/exporting.src.js
/**
	 * Make hyphenated property names out of camelCase
	 */
Make hyphenated property names out of camelCase
Make hyphenated property names out of camelCase
function hyphenate(prop) {
		return prop.replace(
			/([A-Z])/g, 
			function (a, b) { 
				return '-' + b.toLowerCase();
			}
		);
	}
function hyphenate ( prop ) { return prop . replace ( / ([A-Z]) / g , function ( a , b ) { return '-' + b . toLowerCase ( ) ; } ) ; }
Make hyphenated property names out of camelCase
Make hyphenated property names out of camelCase