javascript - fabric.js - Circle don't work if properties defined outside of new fabric.Circle() brackets -


when create new circle object wit properties in brackets no problem appears when circle needs generated. (old way)

function vanillaobjectfunc(type) {      if (type === 'rect') {         var tobject = new fabric.rect({             width: 50,             height: 50,             opacity: 0.8,             fill: 'black',             left: canvasb.width / 2,             top: canvasb.height / 2         });     } else {         var tobject = new fabric.circle({             radius: 20,             opacity: 0.8,             fill: 'black',             left: canvasb.width / 2,             top: canvasb.height / 2         });     }      canvasb.getobjects();     canvasb.add(tobject);     canvasb.selection = false;     canvasb.renderall();     canvasb.calcoffset(); }

but in dynamically function defines properties after creating circle object , add circle on canvas, should like: (new way)

function newobjectfunc(type) {      var tobject = new fabric[type]({});      tobject['opacity'] = 0.8;     tobject['fill'] = 'black';     tobject['left'] = canvasa.width / 2;     tobject['top'] = canvasa.height / 2;       if (type == 'circle') {         tobject['radius'] = 100;     } else if (type == 'rect') {         tobject['width'] = 50;         tobject['height'] = 50;     }      canvasa.getobjects();     canvasa.add(tobject);     canvasa.selection = false;     canvasa.renderall();     canvasa.calcoffset(); }

looking easy, there strange issue, because circle don't gets generated, way , don't found reason why.

the properties same. console.log of circle-object (new way) looks correct, too.

https://jsfiddle.net/sascha/052jnlu6/2/

what i'm missing here?

in situation, should avoid direct property assignment , use fabric.object.set() instead:

tobject.set({     opacity: 0.8,     fill: 'black',     left: canvasa.width / 2,     top: canvasa.height / 2 });  if (type == 'circle') {     tobject.set('radius', 100); } else if (type == 'rect') {     tobject.set({         width: 50,         height: 50     }); }

you find updated fiddle here.


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