function endsWith(str, suffix) { return str.indexOf(suffix, str.length - suffix.length) !== -1; } export default (function (file, acceptedFiles) { if (file && acceptedFiles) { var acceptedFilesArray = Array.isArray(acceptedFiles) ? acceptedFiles : acceptedFiles.split(','); var fileName = file.name || ''; var mimeType = file.type || ''; var baseMimeType = mimeType.replace(/\/.*$/, ''); return acceptedFilesArray.some(function (type) { var validType = type.trim(); if (validType.charAt(0) === '.') { return endsWith(fileName.toLowerCase(), validType.toLowerCase()); } else if (/\/\*$/.test(validType)) { // This is something like a image/* mime type return baseMimeType === validType.replace(/\/.*$/, ''); } return mimeType === validType; }); } return true; });