tinymce-docs-4x/_includes/configuration/selector.md

selector

This option allows you to specify a CSS selector for the areas that TinyMCE should make editable.

When using this option in TinyMCE's regular editing mode, the element will be replaced with an iframe that TinyMCE will perform all operations within.

Replace all textarea elements on the page

Type: String

Example

tinymce.init({
  selector: 'textarea'  // change this value according to your HTML
});

Replace a textarea element with id 'editable'

Type: String

Example

tinymce.init({
    selector: 'textarea#editable'
});

When using this option in TinyMCE's inline editing mode, the selector can be used on any block element and will edit the content in place instead of replacing the element with an iframe.

Inline editing mode on a div element with id 'editable'

Type: String

Example

tinymce.init({
    selector: 'div#editable',
    inline: true
});

For more information on the differences between regular and inline editing modes please see this page [here]({{ site.baseurl }}/general-configuration-guide/use-tinymce-inline/).