Test JS script file

Selected file: 22var_undefined.js
Compare console.log() outputs in browser and NodeJS.
Notice: Open browser's console in FireBUG!

  1. 01var_identifier.js
  2. 03var_data_types.js
  3. 03var_data_types_novar.js
  4. 04var_primitiveToObject.js
  5. 05var_string_object.js
  6. 06var_converting_data_types.js
  7. 10var_local_global_outside_function.js
  8. 12var_local_global_inside_function.js
  9. 13var_local_global_inside_function2.js
  10. 14var_local_global_return.js
  11. 16var_global_browser.js
  12. 16var_global_node.js
  13. 20var_Infinity.js
  14. 21var_NaN.js
  15. 22var_undefined.js
  16. 22var_undefined2.js
  17. 23var_empty_string.js
  18. 23var_null_obj.js

..:: Source code - 22var_undefined.js ::..

/**
 * undefined value
 */

var name; //not yet defined variable

var type=typeof name;

//browser - string:
//nodeJS - undefined: undefined
console.log(type +': '+ name);
 

..:: NodeJS Console - 22var_undefined.js ::..

$ node 22var_undefined.js 
undefined: undefined

$ps -aux | grep node (list all node processes)
sasa        1194  0.4  0.4 1301484 77164 ?       Ssl  Oct24  11:37 node /home/sasa/.pm2/modules/pm2-logrotate/node_modules/pm2-logr
sasa        1200  0.5  0.7 11712216 128376 ?     Ssl  Oct24  16:32 node /home/sasa/dex8/dex8-api/starter.js
sasa        1207  0.3  0.4 1298956 65804 ?       Ssl  Oct24   8:37 node /home/sasa/regoch/regoch-www/server
sasa        1208  0.2  0.3 1297544 64148 ?       Ssl  Oct24   8:15 node /home/sasa/dex8/dex8-panel/server/index.js
sasa        1224  0.7  0.5 11818304 92076 ?      Ssl  Oct24  19:34 node /home/sasa/dex8/dex8-www/server/index.js
sasa        1236  0.3  0.4 11796056 81568 ?      Ssl  Oct24   9:13 node /home/sasa/mikosoft_hr/www-mikosoft-hr/server/index.js
sasa        1255  0.5  0.4 1328700 81364 ?       Ssl  Oct24  15:23 node /home/sasa/mikosoft-info/api-mikosoft-info/starter.js
sasa        1257  0.3  0.3 1298132 65316 ?       Ssl  Oct24   8:27 node /home/sasa/mikosoft-info/www-mikosoft-info/server/index.js
sasa        1289  0.2  0.3 1293504 60164 ?       Ssl  Oct24   8:12 node /home/sasa/dex8/dex8-kiosk/server/index.js
sasa        1292  0.3  0.5 11818400 90644 ?      Ssl  Oct24  10:40 node /home/sasa/mikosoft-info/dodo-mikosoft-info/server/index.js
sasa        1361  0.5  0.6 1149548 105064 ?      Ssl  Oct24  16:28 node /home/sasa/voovuu/voovuu-api/starter.js
sasa        1363  1.5  0.9 11858896 159588 ?     Ssl  Oct24  43:50 node /home/sasa/voovuu/voovuu-pub/server/index.js
sasa        1441  0.3  0.4 11660872 74976 ?      Ssl  Oct24   8:54 node /home/sasa/@mikosoft/dodo-examples/server/index.js
sasa        1449  0.3  0.3 1165544 64296 ?       Ssl  Oct24   8:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1528  0.7  0.7 22321168 130116 ?     Ssl  Oct24  21:15 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1529  0.3  0.3 1099364 63060 ?       Ssl  Oct24   8:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1606  0.3  0.3 1099364 63124 ?       Ssl  Oct24   8:33 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1607  0.3  0.3 1099364 63764 ?       Ssl  Oct24   8:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1705  0.3  0.3 1099624 64828 ?       Ssl  Oct24   8:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1706  0.3  0.3 1099364 63396 ?       Ssl  Oct24   8:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1805  0.3  0.3 1099360 64792 ?       Ssl  Oct24   8:31 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1807  0.3  0.3 1100128 64184 ?       Ssl  Oct24   8:29 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1885  0.3  0.3 1099112 64136 ?       Ssl  Oct24   8:32 node /home/sasa/dex8/dex8-worker/starter.js
sasa        1886  0.6  0.6 11811752 108592 ?     Ssl  Oct24  16:55 node /home/sasa/mikosoft-info/crypto-mikosoft-info/server/index.
www-data  287236  0.0  0.0   2608   532 ?        S    12:49   0:00 sh -c ps -aux | grep node
www-data  287238  0.0  0.0   3304   716 ?        S    12:49   0:00 grep node