Andrew O'Neill
Andrew O'Neill

Reputation: 255

How to listen for and react to Ace Editor change events

What would be an example of how the on change event works in ACE Editor (https://ace.c9.io/#nav=api&api=editor), with a simple getValue() when the there is an on change event and send the new text to a div?

Upvotes: 20

Views: 22489

Answers (1)

ralf htp
ralf htp

Reputation: 9422

See https://jsfiddle.net/ralf_htp/hbxhgdr1/ and http://jsfiddle.net/revathskumar/rY37e/

HTML

<div class="container">
  <div class="panel panel-default">
    <div class="panel-heading">
      <h3 class="panel-title">Editor</h3>
    </div>
    <div class="panel-body">
      <a href="#" onclick="update()">go</a>
      <div id="editor" onChange="update()">function foo(items) { var x = "All this is syntax highlighted"; return x; }
      </div>
    </div>
  </div>
  <div id="output">Output is here (click 'go' and write HTML and js in the editor) </div>
  <div class="text-center">---End of editor---</div>
</div>

JavaScript

var editor = ace.edit("editor");
editor.setTheme("ace/theme/monokai");
editor.getSession().setMode("ace/mode/javascript");
editor.getSession().on('change', function() {
  update()
});

function update() //writes in <div> with id=output
{
  var val = editor.getSession().getValue();
  var divecho = document.getElementById("output");
  divecho.innerHTML = val;
}

The function update() implements the onChange event that is associated with the editor. If the go-link is clicked and then a character is written in the editor, the update()-function outputs the content of the editor in the <div> with id = output as HTML (innerHTML)

CSS

#editor {
  /** Setting height is also important, otherwise the editor won’t show up **/
  height: 300px;
}

#output {
  height: 100px;
}

https://ace.c9.io/, section Listening to Events

See also this question: Ace editor with an onchange event is not working

Upvotes: 24

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