javascript - Summernote custom dialog and button -

i try implement summertnote editor. here js code:

$(document).ready(function() { //summernote //var te_markdown = document.getelementbyid("code-markdown");. var textarea = document.getelementbyid("code"); var hellobutton = function (context) {     var ui = $.summernote.ui;     // create button     var button = ui.button({         contents: '<i class="fa fa-child"/> hello',         tooltip: 'ciao!',         click: function () {             // invoke inserttext method 'hello' on editor module.             context.invoke('editor.inserttext', 'hello');         }     });     return button.render();   // return button jquery object } function autoformat() {     var totallines = editor.linecount();     editor.autoformatrange({line:0, ch:0}, {line:totallines}); } $('#st-editor').summernote({     lang: 'it-it',               // set italian language     height: 350,                 // set editor height     width: 350,                  // set editor width     minheight: null,             // set minimum height of editor     maxheight: null,             // set maximum height of editor     dialogsfade: true,           // set fade on dialog     prettifyhtml: false,     toolbar: [         ['mybutton', ['hello']]     ],     buttons: {         hello: hellobutton     },     codemirror: {                // codemirror options         mode: "text/html",         linenumbers: true,         linewrapping: true,         extrakeys: {"ctrl-q": function(cm){ cm.foldcode(cm.getcursor()); }},         foldgutter: true,         theme: 'monokai',         gutters: ["codemirror-linenumbers", "codemirror-foldgutter"]     }    },     focus: true  set focus editable area after initializing summernote }); 

i code here: http://summernote.org/deep-dive/#custom-button so, in example want put "hello" string clicking button gives me error "typeerror: context undefined". can me?

thanks

instead of

  context.invoke('editor.inserttext', 'hello'); 

use

  $('#st-editor').summernote('editor.inserttext', 'hello');  

works if have 1 editor of course. i'm still searching how context thingy passed. maybe oninit, couldn't working yet.