Javascript array variable gets lost in loop -


this question has answer here:

so i'm trying put in additional buttons tinymce wysiwyg editor on wordpress. they're showing , functioning (sort of). when clicked they're outputting last variable in array, weird because using variable in other places in loop , works fine.

(function() {   tinymce.create('tinymce.plugins.col', {     init : function(ed, url) {       var col_id = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten', 'eleven'];       for(var = 0; < col_id.length; i++){         var colnum = col_id[i];         ed.addbutton(colnum+'_col', {           title : colnum+' column',           image : url+'/images/mce/'+colnum+'.png',           onclick : function() {             ed.selection.setcontent('['+colnum+'_col]' + ed.selection.getcontent() + '[/'+colnum+'_col]');            }          }); // ***** col *****          ed.addbutton(colnum+'_col_first', {            title : colnum+' column first',            image : url+'/images/mce/'+colnum+'.png',            onclick : function() {              ed.selection.setcontent('['+colnum+'_col_first]' + ed.selection.getcontent() + '[/'+colnum+'_col_first]');             }           });  // ******  col first ******           ed.addbutton(colnum+'_col_last', {             title : colnum+' column last',             image : url+'/images/mce/'+colnum+'.png',             onclick : function() {               ed.selection.setcontent('['+colnum+'_col_last]' + ed.selection.getcontent() + '[/'+colnum+'_col_last]');             }           });   //*********  col last **********         }       },       createcontrol : function(n, cm) {         return null;       },     });     tinymce.pluginmanager.add('col', tinymce.plugins.col);   })();

what happens when click 1 of buttons output short code of [eleven_col][/eleven_col], confuses me because title , image url output correctly.

i think classic closure problem, can explained here: javascript closure inside loops – simple practical example

wrap inside of for loop in this:

(function (colnum) {     // code in loop })(col_id[i]);

and remove var colnum = col_id[i]; line

so final code this:

(function() {     tinymce.create('tinymce.plugins.col', {         init : function(ed, url) {             var col_id = ['one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten', 'eleven'];             for(var = 0; < col_id.length; i++){                 (function (colnum) {    // <---------------------- added                     ed.addbutton(colnum+'_col', {                         title : colnum+' column',                         image : url+'/images/mce/'+colnum+'.png',                         onclick : function() {                             ed.selection.setcontent('['+colnum+'_col]' + ed.selection.getcontent() + '[/'+colnum+'_col]');                          }                     }); // ***** col *****                      ed.addbutton(colnum+'_col_first', {                         title : colnum+' column first',                         image : url+'/images/mce/'+colnum+'.png',                         onclick : function() {                             ed.selection.setcontent('['+colnum+'_col_first]' + ed.selection.getcontent() + '[/'+colnum+'_col_first]');                          }                     });  // ******  col first ******                      ed.addbutton(colnum+'_col_last', {                         title : colnum+' column last',                         image : url+'/images/mce/'+colnum+'.png',                         onclick : function() {                             ed.selection.setcontent('['+colnum+'_col_last]' + ed.selection.getcontent() + '[/'+colnum+'_col_last]');                          }                     });   //*********  col last **********                 })(col_id[i]);    // <------------------------- added             }         },         createcontrol : function(n, cm) {             return null;         }     });     tinymce.pluginmanager.add('col', tinymce.plugins.col); })();

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