javascript JavaScript Cookie - 获取Cookie，设置Cookie，删除Cookie

Posted 2021-05-03

/**
 * Set Cookie
 *
 * @param name name of the cookie
 * @param value value of the cookie
 * @param days days for the cookie
 */
function setCookie( name, value, days ) {
  var expires = "";
  if ( days ) {
    var date = new Date();
    date.setTime( date.getTime() + ( days * 24 * 60 * 60 * 1000 ) );
    expires = "; expires=" + date.toUTCString();
  }
  document.cookie = name + "=" + (value || "")  + expires + "; path=/";
}

/**
 * Get Cookie
 *
 * @param name name of the cookie
 */
function getCookie( name ) {
  var nameEQ = name + "=";
  var ca = document.cookie.split( ';' );
  for( var i=0;i < ca.length;i++ ) {
    var c = ca[i];
    while ( c.charAt( 0 ) == ' ' ) c = c.substring( 1, c.length );
    if ( c.indexOf( nameEQ ) == 0 ) return c.substring( nameEQ.length, c.length );
  }
  return null;
}

/**
 * Erase Cookie
 *
 * @param name name of the cookie
 */
function eraseCookie( name ) {
  document.cookie = name+'=; Max-Age=-99999999;';
}