new custom trait not able to set target value

[surendar02997]

I am trying to add custom trait for label and getinput element textarea is created but target value not setting properly and once it saved changes is showing empty label content

    $this.editor.TraitManager.addType('content', {
        events: {
            'keyup': 'onChange',  // trigger parent onChange method on keyup
        },

        getInputEl: function () {
            if (!this.inputEl) {
                const input = document.createElement('textarea');
                  console.log("target",this.target);
                input.value = this.target.get('content');
                this.inputEl = input;
            }
            return this.inputEl;
        },
        onValueChange: function () {
         this.target.set('content', this.model.get('value'));
        }
    });
    Anyone help on this.

This was correctly working before v0.16.27 this version

From this version to latest version the code is not working, i.e The label named trait not updating in canvas