dat.gui/controllers/controller.string.js

var StringController = function() {

	this.type = "string";

	var _this = this;

	Controller.apply(this, arguments);

	var input = document.createElement('input');

	var initialValue = this.getValue();

	input.setAttribute('value', initialValue);
	input.setAttribute('spellcheck', 'false');

	this.domElement.addEventListener('mouseup', function() {
		input.focus();
		input.select();
	}, false);

	input.addEventListener('keyup', function() {
		_this.setValue(input.value);
	}, false);

	this.domElement.appendChild(input);

	this.updateValue = function(val) {
		input.setAttribute('value', val);
	}

};
StringController.prototype = new Controller();
StringController.prototype.constructor = StringController;