curved Text clone not working in fabric.js version 5.3.0

I’m working with fabric.js version 5.3.0.
additionally using curvetext.js file to generate curved text in fabric.js.

Description:
clone not working with curved text , it not return clone object same as original one.
Please check below fiddle to generate the issue.
[https://jsfiddle.net/Niketa_patel/snw9yx21/7/#save][1]

here is my code:

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<code>(function (fabric) {
/*
* CurvedText object for fabric.js
* @author Arjan Haverkamp (av01d)
* @date January 2018
*/
fabric.CurvedText = fabric.util.createClass(fabric.Object, {
type: "curved-text",
diameter: 250,
kerning: 0,
text: "",
flipped: false,
fill: "#000",
fontFamily: "Times New Roman",
fontSize: 24, // in px
fontWeight: "normal",
fontStyle: "", // "normal", "italic" or "oblique".
cacheProperties: fabric.Object.prototype.cacheProperties.concat(
"diameter",
"kerning",
"flipped",
"fill",
"fontFamily",
"fontSize",
"fontWeight",
"fontStyle",
"strokeStyle",
"strokeWidth"
),
strokeStyle: null,
strokeWidth: 0,
initialize: function (text, options) {
options || (options = {});
if (typeof text === 'object' && text.text) {
this.text = text.text;
text = this.text;
} else {
this.text = text;
}
this.callSuper("initialize", options);
this.set("lockUniScaling", true);
// Draw curved text here initially too, while we need to know the width and height.
var canvas = this.getCircularText();
this._trimCanvas(canvas);
this.set("width", canvas.width);
this.set("height", canvas.height);
},
_getFontDeclaration: function () {
return [
// node-canvas needs "weight style", while browsers need "style weight"
fabric.isLikelyNode ? this.fontWeight : this.fontStyle,
fabric.isLikelyNode ? this.fontStyle : this.fontWeight,
this.fontSize + "px",
fabric.isLikelyNode ? '"' + this.fontFamily + '"' : this.fontFamily,
].join(" ");
},
_trimCanvas: function (canvas) {
try {
var ctx = canvas.getContext("2d"),
w = canvas.width,
h = canvas.height,
pix = {
x: [],
y: [],
},
n,
imageData = ctx.getImageData(0, 0, w, h),
fn = function (a, b) {
return a - b;
};
for (var y = 0; y < h; y++) {
for (var x = 0; x < w; x++) {
if (imageData.data[(y * w + x) * 4 + 3] > 0) {
pix.x.push(x);
pix.y.push(y);
}
}
}
pix.x.sort(fn);
pix.y.sort(fn);
n = pix.x.length - 1;
w = pix.x[n] - pix.x[0];
h = pix.y[n] - pix.y[0];
var cut = ctx.getImageData(pix.x[0], pix.y[0], w, h);
canvas.width = w;
canvas.height = h;
ctx.putImageData(cut, 0, 0);
} catch (error) {
console.log(error);
}
},
// Source: http://jsfiddle.net/rbdszxjv/
getCircularText: function () {
// debugger;
var text = this.text,
diameter = this.diameter,
flipped = this.flipped,
kerning = this.kerning,
fill = this.fill,
inwardFacing = true,
startAngle = 0,
canvas = fabric.util.createCanvasElement(),
ctx = canvas.getContext("2d"),
cw, // character-width
x, // iterator
clockwise = -1; // draw clockwise for aligned right. Else Anticlockwise
if (flipped) {
startAngle = 180;
inwardFacing = false;
}
startAngle *= Math.PI / 180; // convert to radians
// Calc heigt of text in selected font:
var d = document.createElement("div");
d.style.position = "relative";
d.style.zIndex = 1111111111111;
d.style.fontFamily = this.fontFamily;
d.style.whiteSpace = "nowrap";
d.style.fontSize = this.fontSize + "px";
d.style.fontWeight = this.fontWeight;
d.style.fontStyle = this.fontStyle;
d.textContent = text;
document.body.appendChild(d);
var textHeight = d.offsetHeight;
document.body.removeChild(d);
canvas.width = canvas.height = diameter;
ctx.font = this._getFontDeclaration();
// Reverse letters for center inward.
if (inwardFacing) {
text = text.split("").reverse().join("");
}
// Setup letters and positioning
ctx.translate(diameter / 2, diameter / 2); // Move to center
startAngle += Math.PI * !inwardFacing; // Rotate 180 if outward
ctx.textBaseline = "middle"; // Ensure we draw in exact center
ctx.textAlign = "center"; // Ensure we draw in exact center
// rotate 50% of total angle for center alignment
for (x = 0; x < text.length; x++) {
cw = ctx.measureText(text[x]).width;
startAngle +=
((cw + (x == text.length - 1 ? 0 : kerning)) /
(diameter / 2 - textHeight) /
2) *
-clockwise;
}
// Phew... now rotate into final start position
ctx.rotate(startAngle);
// Now for the fun bit: draw, rotate, and repeat
for (x = 0; x < text.length; x++) {
cw = ctx.measureText(text[x]).width; // half letter
// rotate half letter
ctx.rotate((cw / 2 / (diameter / 2 - textHeight)) * clockwise);
// draw the character at "top" or "bottom"
// depending on inward or outward facing
// Stroke
if (this.strokeStyle && this.strokeWidth) {
ctx.strokeStyle = this.strokeStyle;
ctx.lineWidth = this.strokeWidth;
ctx.miterLimit = 2;
ctx.strokeText(
text[x],
0,
(inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)
);
}
// Actual text
ctx.fillStyle = fill;
ctx.fillText(
text[x],
0,
(inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)
);
ctx.rotate(
((cw / 2 + kerning) / (diameter / 2 - textHeight)) * clockwise
); // rotate half letter
}
return canvas;
},
// Curve Text Cloned
getCircularTextCalculations: function () {
let curvCalculations = {};
var text = this.text,
diameter = this.diameter,
flipped = this.flipped,
kerning = this.kerning,
fill = this.fill,
inwardFacing = true,
startAngle = 0,
canvas = fabric.util.createCanvasElement(),
ctx = canvas.getContext("2d"),
cw, // character-width
x, // iterator
clockwise = -1; // draw clockwise for aligned right. Else Anticlockwise
if (flipped) {
startAngle = 180;
inwardFacing = false;
}
startAngle *= Math.PI / 180; // convert to radians
let initialize = {
text,
diameter,
flipped,
kerning,
fill,
inwardFacing,
startAngle,
canvas,
ctx,
cw,
x,
clockwise,
inwardFacing,
};
curvCalculations = { ...curvCalculations, initialize };
// Calc heigt of text in selected font:
var d = document.createElement("div");
d.style.position = "relative";
d.style.zIndex = 1111111111111;
d.style.fontFamily = this.fontFamily;
d.style.whiteSpace = "nowrap";
d.style.fontSize = this.fontSize + "px";
d.style.fontWeight = this.fontWeight;
d.style.fontStyle = this.fontStyle;
d.textContent = text;
document.body.appendChild(d);
var textHeight = d.offsetHeight;
document.body.removeChild(d);
canvas.width = canvas.height = diameter;
ctx.font = this._getFontDeclaration();
// Reverse letters for center inward.
if (inwardFacing) {
text = text.split("").reverse().join("");
}
let fontCalculations = {
fontSize: this.fontSize,
fontWeight: this.fontWeight,
fontStyle: this.fontStyle,
textHeight,
_getFontDeclaration: this._getFontDeclaration(),
};
curvCalculations = { ...curvCalculations, fontCalculations };
// Setup letters and positioning
ctx.translate(diameter / 2, diameter / 2); // Move to center
startAngle += Math.PI * !inwardFacing; // Rotate 180 if outward
ctx.textBaseline = "middle"; // Ensure we draw in exact center
ctx.textAlign = "center"; // Ensure we draw in exact center
// rotate 50% of total angle for center alignment
for (x = 0; x < text.length; x++) {
cw = ctx.measureText(text[x]).width;
startAngle +=
((cw + (x == text.length - 1 ? 0 : kerning)) /
(diameter / 2 - textHeight) /
2) *
-clockwise;
}
// Phew... now rotate into final start position
ctx.rotate(startAngle);
let ctxRotateFirstLoop = {
startAngle,
};
curvCalculations = { ...curvCalculations, ctxRotateFirstLoop };
let drawRotateLoopCalc = {};
let rotate1 = [];
let ctxStrikeText = [];
let ctxFillText = [];
let ctxRotate = [];
// Now for the fun bit: draw, rotate, and repeat
for (x = 0; x < text.length; x++) {
cw = ctx.measureText(text[x]).width; // half letter
// rotate half letter
ctx.rotate((cw / 2 / (diameter / 2 - textHeight)) * clockwise);
rotate1 = [...rotate1, (cw / 2 / (diameter / 2 - textHeight)) * clockwise]
// draw the character at "top" or "bottom"
// depending on inward or outward facing
// Stroke
if (this.strokeStyle && this.strokeWidth) {
ctx.strokeStyle = this.strokeStyle;
ctx.lineWidth = this.strokeWidth;
ctx.miterLimit = 2;
ctx.strokeText(
text[x],
0,
(inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)
);
}
ctxStrikeText = [...ctxStrikeText, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)]
// Actual text
ctx.fillStyle = fill;
ctx.fillText(
text[x],
0,
(inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)
);
ctxFillText = [...ctxFillText, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)]
ctx.rotate(
((cw / 2 + kerning) / (diameter / 2 - textHeight)) * clockwise
); // rotate half letter
ctxRotate = [...ctxRotate, ((cw / 2 + kerning) / (diameter / 2 - textHeight)) * clockwise]
}
drawRotateLoopCalc = {
rotate1,
ctxStrikeText,
ctxFillText,
ctxRotate
}
curvCalculations = { ...curvCalculations, drawRotateLoopCalc };
return curvCalculations;
},
_set: function (key, value) {
switch (key) {
/* case 'scaleX':
this.fontSize *= value;
this.diameter *= value;
this.width *= value;
this.scaleX = 1;
if (this.width < 1) {
this.width = 1;
}
break;
*/
/* case 'scaleY':
this.height *= value;
this.scaleY = 1;
if (this.height < 1) {
this.height = 1;
}
break; */
default:
this.callSuper("_set", key, value);
break;
}
},
_render: function (ctx) {
var canvas = this.getCircularText();
this._trimCanvas(canvas);
this.set("width", canvas.width);
this.set("height", canvas.height);
ctx.drawImage(
canvas,
-this.width / 2,
-this.height / 2,
this.width,
this.height
);
this.setCoords();
},
toObject: function (propertiesToInclude) {
return this.callSuper(
"toObject",
[
"text",
"diameter",
"kerning",
"flipped",
"fill",
"fontFamily",
"fontSize",
"fontWeight",
"fontStyle",
"strokeStyle",
"strokeWidth",
"width"
].concat(propertiesToInclude)
);
},
});
fabric.CurvedText.fromObject = function (object, callback, forceAsync) {
return fabric.Object._fromObject(
"CurvedText",
object,
callback,
forceAsync,
"curved-text"
);
};
})(typeof fabric !== "undefined" ? fabric : fabric);
var fcanvas = new fabric.Canvas('canv');
const curvedText = new fabric.CurvedText('It feels so nice to be able to draw', {
diameter: 360,
fontSize: 32,
fontFamily: 'Arial',
left: 50,
top: 50,
fill: 'red'
});
let democopy = {};
// Add a circular text
fcanvas.add(curvedText);
curvedText.clone(cloned=>{
console.log(cloned,'curvedText');
democopy = cloned;
})
democopy.clone(cloned=>{
console.log(cloned,'cloned');
console.log(curvedText,'curvedText')
fcanvas.add(cloned);
})</code>
<code>(function (fabric) { /* * CurvedText object for fabric.js * @author Arjan Haverkamp (av01d) * @date January 2018 */ fabric.CurvedText = fabric.util.createClass(fabric.Object, { type: "curved-text", diameter: 250, kerning: 0, text: "", flipped: false, fill: "#000", fontFamily: "Times New Roman", fontSize: 24, // in px fontWeight: "normal", fontStyle: "", // "normal", "italic" or "oblique". cacheProperties: fabric.Object.prototype.cacheProperties.concat( "diameter", "kerning", "flipped", "fill", "fontFamily", "fontSize", "fontWeight", "fontStyle", "strokeStyle", "strokeWidth" ), strokeStyle: null, strokeWidth: 0, initialize: function (text, options) { options || (options = {}); if (typeof text === 'object' && text.text) { this.text = text.text; text = this.text; } else { this.text = text; } this.callSuper("initialize", options); this.set("lockUniScaling", true); // Draw curved text here initially too, while we need to know the width and height. var canvas = this.getCircularText(); this._trimCanvas(canvas); this.set("width", canvas.width); this.set("height", canvas.height); }, _getFontDeclaration: function () { return [ // node-canvas needs "weight style", while browsers need "style weight" fabric.isLikelyNode ? this.fontWeight : this.fontStyle, fabric.isLikelyNode ? this.fontStyle : this.fontWeight, this.fontSize + "px", fabric.isLikelyNode ? '"' + this.fontFamily + '"' : this.fontFamily, ].join(" "); }, _trimCanvas: function (canvas) { try { var ctx = canvas.getContext("2d"), w = canvas.width, h = canvas.height, pix = { x: [], y: [], }, n, imageData = ctx.getImageData(0, 0, w, h), fn = function (a, b) { return a - b; }; for (var y = 0; y < h; y++) { for (var x = 0; x < w; x++) { if (imageData.data[(y * w + x) * 4 + 3] > 0) { pix.x.push(x); pix.y.push(y); } } } pix.x.sort(fn); pix.y.sort(fn); n = pix.x.length - 1; w = pix.x[n] - pix.x[0]; h = pix.y[n] - pix.y[0]; var cut = ctx.getImageData(pix.x[0], pix.y[0], w, h); canvas.width = w; canvas.height = h; ctx.putImageData(cut, 0, 0); } catch (error) { console.log(error); } }, // Source: http://jsfiddle.net/rbdszxjv/ getCircularText: function () { // debugger; var text = this.text, diameter = this.diameter, flipped = this.flipped, kerning = this.kerning, fill = this.fill, inwardFacing = true, startAngle = 0, canvas = fabric.util.createCanvasElement(), ctx = canvas.getContext("2d"), cw, // character-width x, // iterator clockwise = -1; // draw clockwise for aligned right. Else Anticlockwise if (flipped) { startAngle = 180; inwardFacing = false; } startAngle *= Math.PI / 180; // convert to radians // Calc heigt of text in selected font: var d = document.createElement("div"); d.style.position = "relative"; d.style.zIndex = 1111111111111; d.style.fontFamily = this.fontFamily; d.style.whiteSpace = "nowrap"; d.style.fontSize = this.fontSize + "px"; d.style.fontWeight = this.fontWeight; d.style.fontStyle = this.fontStyle; d.textContent = text; document.body.appendChild(d); var textHeight = d.offsetHeight; document.body.removeChild(d); canvas.width = canvas.height = diameter; ctx.font = this._getFontDeclaration(); // Reverse letters for center inward. if (inwardFacing) { text = text.split("").reverse().join(""); } // Setup letters and positioning ctx.translate(diameter / 2, diameter / 2); // Move to center startAngle += Math.PI * !inwardFacing; // Rotate 180 if outward ctx.textBaseline = "middle"; // Ensure we draw in exact center ctx.textAlign = "center"; // Ensure we draw in exact center // rotate 50% of total angle for center alignment for (x = 0; x < text.length; x++) { cw = ctx.measureText(text[x]).width; startAngle += ((cw + (x == text.length - 1 ? 0 : kerning)) / (diameter / 2 - textHeight) / 2) * -clockwise; } // Phew... now rotate into final start position ctx.rotate(startAngle); // Now for the fun bit: draw, rotate, and repeat for (x = 0; x < text.length; x++) { cw = ctx.measureText(text[x]).width; // half letter // rotate half letter ctx.rotate((cw / 2 / (diameter / 2 - textHeight)) * clockwise); // draw the character at "top" or "bottom" // depending on inward or outward facing // Stroke if (this.strokeStyle && this.strokeWidth) { ctx.strokeStyle = this.strokeStyle; ctx.lineWidth = this.strokeWidth; ctx.miterLimit = 2; ctx.strokeText( text[x], 0, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2) ); } // Actual text ctx.fillStyle = fill; ctx.fillText( text[x], 0, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2) ); ctx.rotate( ((cw / 2 + kerning) / (diameter / 2 - textHeight)) * clockwise ); // rotate half letter } return canvas; }, // Curve Text Cloned getCircularTextCalculations: function () { let curvCalculations = {}; var text = this.text, diameter = this.diameter, flipped = this.flipped, kerning = this.kerning, fill = this.fill, inwardFacing = true, startAngle = 0, canvas = fabric.util.createCanvasElement(), ctx = canvas.getContext("2d"), cw, // character-width x, // iterator clockwise = -1; // draw clockwise for aligned right. Else Anticlockwise if (flipped) { startAngle = 180; inwardFacing = false; } startAngle *= Math.PI / 180; // convert to radians let initialize = { text, diameter, flipped, kerning, fill, inwardFacing, startAngle, canvas, ctx, cw, x, clockwise, inwardFacing, }; curvCalculations = { ...curvCalculations, initialize }; // Calc heigt of text in selected font: var d = document.createElement("div"); d.style.position = "relative"; d.style.zIndex = 1111111111111; d.style.fontFamily = this.fontFamily; d.style.whiteSpace = "nowrap"; d.style.fontSize = this.fontSize + "px"; d.style.fontWeight = this.fontWeight; d.style.fontStyle = this.fontStyle; d.textContent = text; document.body.appendChild(d); var textHeight = d.offsetHeight; document.body.removeChild(d); canvas.width = canvas.height = diameter; ctx.font = this._getFontDeclaration(); // Reverse letters for center inward. if (inwardFacing) { text = text.split("").reverse().join(""); } let fontCalculations = { fontSize: this.fontSize, fontWeight: this.fontWeight, fontStyle: this.fontStyle, textHeight, _getFontDeclaration: this._getFontDeclaration(), }; curvCalculations = { ...curvCalculations, fontCalculations }; // Setup letters and positioning ctx.translate(diameter / 2, diameter / 2); // Move to center startAngle += Math.PI * !inwardFacing; // Rotate 180 if outward ctx.textBaseline = "middle"; // Ensure we draw in exact center ctx.textAlign = "center"; // Ensure we draw in exact center // rotate 50% of total angle for center alignment for (x = 0; x < text.length; x++) { cw = ctx.measureText(text[x]).width; startAngle += ((cw + (x == text.length - 1 ? 0 : kerning)) / (diameter / 2 - textHeight) / 2) * -clockwise; } // Phew... now rotate into final start position ctx.rotate(startAngle); let ctxRotateFirstLoop = { startAngle, }; curvCalculations = { ...curvCalculations, ctxRotateFirstLoop }; let drawRotateLoopCalc = {}; let rotate1 = []; let ctxStrikeText = []; let ctxFillText = []; let ctxRotate = []; // Now for the fun bit: draw, rotate, and repeat for (x = 0; x < text.length; x++) { cw = ctx.measureText(text[x]).width; // half letter // rotate half letter ctx.rotate((cw / 2 / (diameter / 2 - textHeight)) * clockwise); rotate1 = [...rotate1, (cw / 2 / (diameter / 2 - textHeight)) * clockwise] // draw the character at "top" or "bottom" // depending on inward or outward facing // Stroke if (this.strokeStyle && this.strokeWidth) { ctx.strokeStyle = this.strokeStyle; ctx.lineWidth = this.strokeWidth; ctx.miterLimit = 2; ctx.strokeText( text[x], 0, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2) ); } ctxStrikeText = [...ctxStrikeText, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)] // Actual text ctx.fillStyle = fill; ctx.fillText( text[x], 0, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2) ); ctxFillText = [...ctxFillText, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)] ctx.rotate( ((cw / 2 + kerning) / (diameter / 2 - textHeight)) * clockwise ); // rotate half letter ctxRotate = [...ctxRotate, ((cw / 2 + kerning) / (diameter / 2 - textHeight)) * clockwise] } drawRotateLoopCalc = { rotate1, ctxStrikeText, ctxFillText, ctxRotate } curvCalculations = { ...curvCalculations, drawRotateLoopCalc }; return curvCalculations; }, _set: function (key, value) { switch (key) { /* case 'scaleX': this.fontSize *= value; this.diameter *= value; this.width *= value; this.scaleX = 1; if (this.width < 1) { this.width = 1; } break; */ /* case 'scaleY': this.height *= value; this.scaleY = 1; if (this.height < 1) { this.height = 1; } break; */ default: this.callSuper("_set", key, value); break; } }, _render: function (ctx) { var canvas = this.getCircularText(); this._trimCanvas(canvas); this.set("width", canvas.width); this.set("height", canvas.height); ctx.drawImage( canvas, -this.width / 2, -this.height / 2, this.width, this.height ); this.setCoords(); }, toObject: function (propertiesToInclude) { return this.callSuper( "toObject", [ "text", "diameter", "kerning", "flipped", "fill", "fontFamily", "fontSize", "fontWeight", "fontStyle", "strokeStyle", "strokeWidth", "width" ].concat(propertiesToInclude) ); }, }); fabric.CurvedText.fromObject = function (object, callback, forceAsync) { return fabric.Object._fromObject( "CurvedText", object, callback, forceAsync, "curved-text" ); }; })(typeof fabric !== "undefined" ? fabric : fabric); var fcanvas = new fabric.Canvas('canv'); const curvedText = new fabric.CurvedText('It feels so nice to be able to draw', { diameter: 360, fontSize: 32, fontFamily: 'Arial', left: 50, top: 50, fill: 'red' }); let democopy = {}; // Add a circular text fcanvas.add(curvedText); curvedText.clone(cloned=>{ console.log(cloned,'curvedText'); democopy = cloned; }) democopy.clone(cloned=>{ console.log(cloned,'cloned'); console.log(curvedText,'curvedText') fcanvas.add(cloned); })</code>
(function (fabric) {
  /*
   * CurvedText object for fabric.js
   * @author Arjan Haverkamp (av01d)
   * @date January 2018
   */

  fabric.CurvedText = fabric.util.createClass(fabric.Object, {
    type: "curved-text",
    diameter: 250,
    kerning: 0,
    text: "",
    flipped: false,
    fill: "#000",
    fontFamily: "Times New Roman",
    fontSize: 24, // in px
    fontWeight: "normal",
    fontStyle: "", // "normal", "italic" or "oblique".
    cacheProperties: fabric.Object.prototype.cacheProperties.concat(
      "diameter",
      "kerning",
      "flipped",
      "fill",
      "fontFamily",
      "fontSize",
      "fontWeight",
      "fontStyle",
      "strokeStyle",
      "strokeWidth"
    ),
    strokeStyle: null,
    strokeWidth: 0,

    initialize: function (text, options) {
      options || (options = {});
      if (typeof text === 'object' && text.text) {
        this.text = text.text;
        text =  this.text;
      } else {
        this.text = text;
      }

      this.callSuper("initialize", options);
      this.set("lockUniScaling", true);

      // Draw curved text here initially too, while we need to know the width and height.
      var canvas = this.getCircularText();
      this._trimCanvas(canvas);
      this.set("width", canvas.width);
      this.set("height", canvas.height);
    },

    _getFontDeclaration: function () {
      return [
        // node-canvas needs "weight style", while browsers need "style weight"
        fabric.isLikelyNode ? this.fontWeight : this.fontStyle,
        fabric.isLikelyNode ? this.fontStyle : this.fontWeight,
        this.fontSize + "px",
        fabric.isLikelyNode ? '"' + this.fontFamily + '"' : this.fontFamily,
      ].join(" ");
    },

    _trimCanvas: function (canvas) {
      try {
        var ctx = canvas.getContext("2d"),
          w = canvas.width,
          h = canvas.height,
          pix = {
            x: [],
            y: [],
          },
          n,
          imageData = ctx.getImageData(0, 0, w, h),
          fn = function (a, b) {
            return a - b;
          };

        for (var y = 0; y < h; y++) {
          for (var x = 0; x < w; x++) {
            if (imageData.data[(y * w + x) * 4 + 3] > 0) {
              pix.x.push(x);
              pix.y.push(y);
            }
          }
        }
        pix.x.sort(fn);
        pix.y.sort(fn);
        n = pix.x.length - 1;

        w = pix.x[n] - pix.x[0];
        h = pix.y[n] - pix.y[0];
        var cut = ctx.getImageData(pix.x[0], pix.y[0], w, h);

        canvas.width = w;
        canvas.height = h;
        ctx.putImageData(cut, 0, 0);
      } catch (error) {
        console.log(error);
      }
    },

    // Source: http://jsfiddle.net/rbdszxjv/
    getCircularText: function () {
      // debugger;
      var text = this.text,
        diameter = this.diameter,
        flipped = this.flipped,
        kerning = this.kerning,
        fill = this.fill,
        inwardFacing = true,
        startAngle = 0,
        canvas = fabric.util.createCanvasElement(),
        ctx = canvas.getContext("2d"),
        cw, // character-width
        x, // iterator
        clockwise = -1; // draw clockwise for aligned right. Else Anticlockwise
      if (flipped) {
        startAngle = 180;
        inwardFacing = false;
      }

      startAngle *= Math.PI / 180; // convert to radians

      // Calc heigt of text in selected font:
      var d = document.createElement("div");
      d.style.position = "relative";
      d.style.zIndex = 1111111111111;
      d.style.fontFamily = this.fontFamily;
      d.style.whiteSpace = "nowrap";
      d.style.fontSize = this.fontSize + "px";
      d.style.fontWeight = this.fontWeight;
      d.style.fontStyle = this.fontStyle;
      d.textContent = text;
      document.body.appendChild(d);
      var textHeight = d.offsetHeight;
      document.body.removeChild(d);

      canvas.width = canvas.height = diameter;

      ctx.font = this._getFontDeclaration();

      // Reverse letters for center inward.
      if (inwardFacing) {
        text = text.split("").reverse().join("");
      }

      // Setup letters and positioning
      ctx.translate(diameter / 2, diameter / 2); // Move to center
      startAngle += Math.PI * !inwardFacing; // Rotate 180 if outward
      ctx.textBaseline = "middle"; // Ensure we draw in exact center
      ctx.textAlign = "center"; // Ensure we draw in exact center

      // rotate 50% of total angle for center alignment
      for (x = 0; x < text.length; x++) {
        cw = ctx.measureText(text[x]).width;
        startAngle +=
          ((cw + (x == text.length - 1 ? 0 : kerning)) /
            (diameter / 2 - textHeight) /
            2) *
          -clockwise;
      }

      // Phew... now rotate into final start position
      ctx.rotate(startAngle);

      // Now for the fun bit: draw, rotate, and repeat
      for (x = 0; x < text.length; x++) {
        cw = ctx.measureText(text[x]).width; // half letter
        // rotate half letter
        ctx.rotate((cw / 2 / (diameter / 2 - textHeight)) * clockwise);
        // draw the character at "top" or "bottom"
        // depending on inward or outward facing

        // Stroke
        if (this.strokeStyle && this.strokeWidth) {
          ctx.strokeStyle = this.strokeStyle;
          ctx.lineWidth = this.strokeWidth;
          ctx.miterLimit = 2;
          ctx.strokeText(
            text[x],
            0,
            (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)
          );
        }

        // Actual text
        ctx.fillStyle = fill;
        ctx.fillText(
          text[x],
          0,
          (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)
        );

        ctx.rotate(
          ((cw / 2 + kerning) / (diameter / 2 - textHeight)) * clockwise
        ); // rotate half letter
      }
      return canvas;
    },

    // Curve Text Cloned
    getCircularTextCalculations: function () {
      let curvCalculations = {};

      var text = this.text,
        diameter = this.diameter,
        flipped = this.flipped,
        kerning = this.kerning,
        fill = this.fill,
        inwardFacing = true,
        startAngle = 0,
        canvas = fabric.util.createCanvasElement(),
        ctx = canvas.getContext("2d"),
        cw, // character-width
        x, // iterator
        clockwise = -1; // draw clockwise for aligned right. Else Anticlockwise
      if (flipped) {
        startAngle = 180;
        inwardFacing = false;
      }
      startAngle *= Math.PI / 180; // convert to radians

      let initialize = {
        text,
        diameter,
        flipped,
        kerning,
        fill,
        inwardFacing,
        startAngle,
        canvas,
        ctx,
        cw,
        x,
        clockwise,
        inwardFacing,
      };

      curvCalculations = { ...curvCalculations, initialize };

      // Calc heigt of text in selected font:
      var d = document.createElement("div");
      d.style.position = "relative";
      d.style.zIndex = 1111111111111;
      d.style.fontFamily = this.fontFamily;
      d.style.whiteSpace = "nowrap";
      d.style.fontSize = this.fontSize + "px";
      d.style.fontWeight = this.fontWeight;
      d.style.fontStyle = this.fontStyle;
      d.textContent = text;
      document.body.appendChild(d);
      var textHeight = d.offsetHeight;
      document.body.removeChild(d);

      canvas.width = canvas.height = diameter;

      ctx.font = this._getFontDeclaration();

      // Reverse letters for center inward.
      if (inwardFacing) {
        text = text.split("").reverse().join("");
      }

      let fontCalculations = {
        fontSize: this.fontSize,
        fontWeight: this.fontWeight,
        fontStyle: this.fontStyle,
        textHeight,
        _getFontDeclaration: this._getFontDeclaration(),
      };

      curvCalculations = { ...curvCalculations, fontCalculations };

      // Setup letters and positioning
      ctx.translate(diameter / 2, diameter / 2); // Move to center
      startAngle += Math.PI * !inwardFacing; // Rotate 180 if outward
      ctx.textBaseline = "middle"; // Ensure we draw in exact center
      ctx.textAlign = "center"; // Ensure we draw in exact center

      // rotate 50% of total angle for center alignment
      for (x = 0; x < text.length; x++) {
        cw = ctx.measureText(text[x]).width;
        startAngle +=
          ((cw + (x == text.length - 1 ? 0 : kerning)) /
            (diameter / 2 - textHeight) /
            2) *
          -clockwise;
      }

      // Phew... now rotate into final start position
      ctx.rotate(startAngle);

      let ctxRotateFirstLoop = {
        startAngle,
      };

      curvCalculations = { ...curvCalculations, ctxRotateFirstLoop };

      let drawRotateLoopCalc = {};
      let rotate1 = [];
      let ctxStrikeText = [];
      let ctxFillText = [];
      let ctxRotate = [];
      // Now for the fun bit: draw, rotate, and repeat
      for (x = 0; x < text.length; x++) {

        cw = ctx.measureText(text[x]).width; // half letter
        // rotate half letter
        ctx.rotate((cw / 2 / (diameter / 2 - textHeight)) * clockwise);
        rotate1 = [...rotate1, (cw / 2 / (diameter / 2 - textHeight)) * clockwise]

        // draw the character at "top" or "bottom"
        // depending on inward or outward facing

        // Stroke
        if (this.strokeStyle && this.strokeWidth) {
          ctx.strokeStyle = this.strokeStyle;
          ctx.lineWidth = this.strokeWidth;
          ctx.miterLimit = 2;
          ctx.strokeText(
            text[x],
            0,
            (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)
          );
        }

        ctxStrikeText = [...ctxStrikeText, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)]


        // Actual text
        ctx.fillStyle = fill;
        ctx.fillText(
          text[x],
          0,
          (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)
        );

        ctxFillText = [...ctxFillText, (inwardFacing ? 1 : -1) * (0 - diameter / 2 + textHeight / 2)]


        ctx.rotate(
          ((cw / 2 + kerning) / (diameter / 2 - textHeight)) * clockwise
        ); // rotate half letter
        
        ctxRotate = [...ctxRotate, ((cw / 2 + kerning) / (diameter / 2 - textHeight)) * clockwise]

      }
      
      

      drawRotateLoopCalc = {
        rotate1,
        ctxStrikeText,
        ctxFillText,
        ctxRotate
      }
      curvCalculations = { ...curvCalculations, drawRotateLoopCalc };
      return curvCalculations;
    },

    _set: function (key, value) {
      switch (key) {
        /* case 'scaleX':
          this.fontSize *= value;
          this.diameter *= value;
          this.width *= value;
          this.scaleX = 1;
          if (this.width < 1) {
            this.width = 1;
          }
          break;
 */
        /* case 'scaleY':
          this.height *= value;
          this.scaleY = 1;
          if (this.height < 1) {
            this.height = 1;
          }
          break; */

        default:
          this.callSuper("_set", key, value);
          break;
      }
    },

    _render: function (ctx) {
      var canvas = this.getCircularText();
      this._trimCanvas(canvas);

      this.set("width", canvas.width);
      this.set("height", canvas.height);

      ctx.drawImage(
        canvas,
        -this.width / 2,
        -this.height / 2,
        this.width,
        this.height
      );

      this.setCoords();
    },

    toObject: function (propertiesToInclude) {
      return this.callSuper(
        "toObject",
        [
          "text",
          "diameter",
          "kerning",
          "flipped",
          "fill",
          "fontFamily",
          "fontSize",
          "fontWeight",
          "fontStyle",
          "strokeStyle",
          "strokeWidth",
          "width"
        ].concat(propertiesToInclude)
      );
    },
  });

  fabric.CurvedText.fromObject = function (object, callback, forceAsync) {
    return fabric.Object._fromObject(
      "CurvedText",
      object,
      callback,
      forceAsync,
      "curved-text"
    );
  };
})(typeof fabric !== "undefined" ? fabric : fabric);
var fcanvas = new fabric.Canvas('canv');

   const curvedText = new fabric.CurvedText('It feels so nice to be able to draw', {
        diameter: 360,
        fontSize: 32,
        fontFamily: 'Arial',
        left: 50,
        top: 50,
        fill: 'red'
    });
  let democopy = {};
   
    // Add a circular text
    fcanvas.add(curvedText);
  curvedText.clone(cloned=>{
  console.log(cloned,'curvedText');
  democopy = cloned;
  })
  democopy.clone(cloned=>{
  console.log(cloned,'cloned');
  console.log(curvedText,'curvedText')
  fcanvas.add(cloned);
  })
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EnlighterJS 3 Syntax Highlighter
<code><script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/5.3.1/fabric.min.js"></script>
<canvas id="canv" width="500" height="300" style="border: 1px solid rgb(204, 204, 204); width: 400px; height: 400px; -webkit-user-select: none;"></canvas></code>
<code><script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/5.3.1/fabric.min.js"></script> <canvas id="canv" width="500" height="300" style="border: 1px solid rgb(204, 204, 204); width: 400px; height: 400px; -webkit-user-select: none;"></canvas></code>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/5.3.1/fabric.min.js"></script>
<canvas id="canv" width="500" height="300" style="border: 1px solid rgb(204, 204, 204); width: 400px; height: 400px; -webkit-user-select: none;"></canvas>

Thank you 🙂

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Trang chủ Giới thiệu Sinh nhật bé trai Sinh nhật bé gái Tổ chức sự kiện Biểu diễn giải trí Dịch vụ khác Trang trí tiệc cưới Tổ chức khai trương Tư vấn dịch vụ Thư viện ảnh Tin tức - sự kiện Liên hệ Chú hề sinh nhật Trang trí YEAR END PARTY công ty Trang trí tất niên cuối năm Trang trí tất niên xu hướng mới nhất Trang trí sinh nhật bé trai Hải Đăng Trang trí sinh nhật bé Khánh Vân Trang trí sinh nhật Bích Ngân Trang trí sinh nhật bé Thanh Trang Thuê ông già Noel phát quà Biểu diễn xiếc khỉ Xiếc quay đĩa
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