tinymce.full.js
function (html, callback) {
        var self = this, body = this.getEl().contentWindow.document.body;

        // Wait for iframe to initialize IE 10 takes time
        if (!body) {
          Delay.setTimeout(function () {
            self.html(html);
          });
        } else {
          body.innerHTML = html;

          if (callback) {
            callback();
          }
        }

        return this;
      }
function (html, callback) {
        var self = this, body = this.getEl().contentWindow.document.body;

        // Wait for iframe to initialize IE 10 takes time
        if (!body) {
          Delay.setTimeout(function () {
            self.html(html);
          });
        } else {
          body.innerHTML = html;

          if (callback) {
            callback();
          }
        }

        return this;
      }
function ( html , callback ) { var self = this , body = this . getEl ( ) . contentWindow . document . body ; // Wait for iframe to initialize IE 10 takes time if ( ! body ) { Delay . setTimeout ( function ( ) { self . html ( html ) ; } ) ; } else { body . innerHTML = html ; if ( callback ) { callback ( ) ; } } return this ; }
Inner HTML for the iframe.

@method html
@param {String} html HTML string to set as HTML inside the iframe.
@param {function} callback Optional callback to execute when the iframe body is filled with contents.
@return {tinymce.ui.Iframe} Current iframe control.
Inner HTML for the iframe .