fabric.js setSelectionStyles issue

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/1.7.9/fabric.min.js"></script>
<canvas id="my-canvas"></canvas>
<button id="fill-color">SET FILL COLOR</button>
<button id="selection-color">SET SELECTION COLOR</button>
<button id="selection-font">SET FONT</button>
<div id="log"></div>

CSS

#log {
	margin-top: 10px;
	color: red;
}

JavaScript

const el = document.getElementById('my-canvas');
const fillColor = document.getElementById('fill-color');
const selectionColor = document.getElementById('selection-color');
const log = document.getElementById('log');

// Init the Canvas via fabricJS
const canvas = new fabric.Canvas(el, {
	backgroundColor: '#fff',
	enableRetinaScaling: true,
	preserveObjectStacking: true,
	controlsAboveOverlay: false,
	selectionCompatibility: true,
	width: 500,
	height: 500
}).renderAll();

const text = new fabric.Textbox('Double click me to edit!',{
	left: canvas.width / 2,
	top: canvas.height / 2,
	originX: 'center',
	originY: 'center',
	width: 200,
	fontSize: 30,
	strokeWidth: 0,
	fill: '#333333',
	textAlign: 'center',
	charSpacing: 0,
	objType: 'text'
});
canvas.add(text).renderAll();

const text1= new fabric.Textbox('Doublegvfgvfvgvf bgvf',{
	left: canvas.width / 3,
	top: canvas.height / 3,
	originX: 'center',
	originY: 'center',
	width: 200,
	fontSize: 30,
	strokeWidth: 0,
	fill: '#333333',
	textAlign: 'center',
	charSpacing: 0,
	objType: 'text'
});
canvas.add(text1).renderAll();

const setFillColor = (color) => {
	const textLayer = canvas.getObjects()[0];
	
	textLayer.set({fill:'red'});
  
  const textLayer1 = canvas.getObjects()[1];
	
	textLayer1.set({fill:'red'});
	log.innerHTML = '';
	canvas.renderAll();
}

const setSelectionColor = (color) => {
	const textLayer = canvas.getObjects()[0];
  const textLayer1 = canvas.getObjects()[1];
	
	if(textLayer.isEditing) {
		textLayer.setSelectionStyles({fill: 'blue'});
    textLayer1.setSelectionStyles({fill: 'blue'});
		log.innerHTML = '';
	} else {
		log.innerHTML = 'please select a word!';
	}
	
	canvas.renderAll();
}

fillColor.addEventListener('click', setFillColor);
selectionColor.addEventListener('click', setSelectionColor);