字符串trim方法封装
const rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
/**
* @description Make sure we trim BOM and NBSP fn
* @param text
* @returns {string}
*/
function trim( text ) {
return text == null ? "" : ( text + "" ).replace( rtrim, "" );
}