ractive/src/utils/warn.js

Next-generation DOM manipulation

/* global console */
var warn, warned = {};

if ( typeof console !== 'undefined' && typeof console.warn === 'function' && typeof console.warn.apply === 'function' ) {
	warn = function ( message, allowDuplicates ) {
		if ( !allowDuplicates ) {
			if ( warned[ message ] ) {
				return;
			}

			warned[ message ] = true;
		}

		console.warn( message );
	};
} else {
	warn = function () {};
}

export default warn;