CodeMirror event

Because I want to use the markdwon module editor of UIKit, I contact codemirror
Here is the basic way to write event binding, which is close to jQuery

var textarea = document.getElementById('block');  
var editor = CodeMirror.fromTextArea(textarea, {  
    lineNumbers: false,  
    content: textarea.value,    
});  

editor.on("blur", function(){  
    console.log("onBlur");  
});