CODEWITHSUNDEEP
javascriptcodemirror
Ben
Ben

Reputation: 11188

Get CodeMirror instance

I want to get an instance of CodeMirror (it is binded to a textarea '#code'). From an onclick-event I want to add a value to the current value of the CodeMirror instance. How can this be achieved? From the docs I can't seem to find anything to get an instance and bind it to a loca var in javascript.

Upvotes: 37

Views: 29048

Answers (6)

ArifMustafa
ArifMustafa

Reputation: 4955

I am using with Vue CLI 3, vue-codemirror component like this:

<codemirror id="textarea_editor" v-model="textarea_input" :options="cm_editor_config"></codemirror>

import codemirror to use within page:

import { codemirror } from 'vue-codemirror'
import 'codemirror/lib/codemirror.css'

and simply add codemirror inside components object, thereafter configuration in data section is:

codemirror_editor: undefined,
cm_editor_config: {
    tabSize: 4,
    mode: 'application/json',
    theme: 'base16-dark',
    lineNumbers: true,
    // lineWrapping: true,
    styleActiveSelected: true,
    line: true,
}

and initialized the object in mounted lifecycle section of Vue:

mounted () {
    if ( !this.codemirror_editor ) {
        this.codemirror_editor = $('#textarea_editor').find('.CodeMirror').get(0).CodeMirror;
    }
    // do something with this.codemirror_editor
}

Hope this would help many one.

Upvotes: 1

ashatte
ashatte

Reputation: 5538

Another method I have found elsewhere is as follows:

//Get a reference to the CodeMirror editor
var editor = document.querySelector('.CodeMirror').CodeMirror;

This works well when you are creating the CodeMirror instance dynamically or replacing an existing DOM element with a CodeMirror instance.

Upvotes: 77

Enigma Plus
Enigma Plus

Reputation: 1548

You can simply drop the var: instead of having 

var editor = CodeMirror.fromTextArea...

Just have 

editor = CodeMirror.fromTextArea...

Then editor is directly available to use in other functions

Upvotes: -2

Alireza Mirian
Alireza Mirian

Reputation: 6672

There is a getWrapperElement on code mirror editor objects which gives you the root DOM element of the code mirror instance: 

var codemirrorDomElem = editor.getWrapperElement();

Upvotes: 10

Mr. Polywhirl
Mr. Polywhirl

Reputation: 48610

You can find the instance starting with the <textarea> and moving to the next sibling.

Native

  • Functional

    document.querySelector('#code').nextSibling,

  • Selector

    document.querySelector('#code + .CodeMirror'),

jQuery

  • Functional

    $('#code').next('.CodeMirror').get(0),

  • Selector

    $('#code + .CodeMirror').get(0)

Extra: A more advanced solution involving clipboard.js -> JSFiddle Demo

Example

// Selector for textarea
var selector = '#code';

$(function() {
  var editor = CodeMirror.fromTextArea($(selector).get(0), {
    mode: 'javascript',
    theme: 'paraiso-dark',
    lineNumbers : true
  });
  editor.setSize(320, 240);
  editor.getDoc().setValue(JSON.stringify(getSampleData(), null, 4));
  
  $('#response').text(allEqual([
    document.querySelector(selector).nextSibling,        // Native - Functional
    document.querySelector(selector + ' + .CodeMirror'), // Native - Selector
    $(selector).next('.CodeMirror').get(0),              // jQuery - Functional
    $(selector + ' + .CodeMirror').get(0)                // jQuery - Selector
  ]));
});

function allEqual(arr) {
  return arr.every(function(current, index, all) {
    return current === all[(index + 1) % all.length];
  });
};

// Return sample JSON data.
function getSampleData() {
	return [
        { color: "red",     value: "#f00" },
        { color: "green",   value: "#0f0" },
        { color: "blue",    value: "#00f" }
    ];
}
#response { font-weight: bold; }
<link href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.7.0/codemirror.min.css" rel="stylesheet"/>
<link href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.7.0/theme/paraiso-dark.min.css" rel="stylesheet"/>

<script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.7.0/codemirror.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

<div>All equal?: <span id="response"></span></div>
<textarea rows="10" cols="60" id="code"></textarea>

Upvotes: 3

Ben
Ben

Reputation: 11188

Someone just posted an answer but removed it. Nevertheless, it was a working solution. Thanks!

-- Basically this was his solution:

// create an instance
var editor = CodeMirror.fromTextArea('code');
// store it
$('#code').data('CodeMirrorInstance', editor);
// get it
var myInstance = $('code').data('CodeMirrorInstance');
// from here on the API functions are available to 'myInstance' again.

Upvotes: 19

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