How to dynamically tick or untick checkbox based on return boolean value from a function in Angular

I am trying to select or unselect checkbox based on a return value from a function in Angular. The function doesn't get called inside the cellrenderer.

I have a function

isChecked:boolean=false

isFunDone()
{if data.value == good.value)
return this.isChecked = true;
}
else{
this.isChecked =false;
}

and in columndef cellrenderer I am calling this:

cellrenderer: (params: { isChecked: any;}) => {
 
return `<input type ="checkbox" [checked]="this.isFunDone.isChecked =='true'"/>`

If your function is a global one, do this.

ngOnInit(): void {
    this.isChecked = this.data.value === this.good.value;
}

// ...

cellrenderer: (params: ICellRendererParams) => {
    if(this.isChecked) {
        return `<input type="checkbox" checked>`
    } else {
        return `<input type="checkbox">`
    }
}

Please note that [checked] won't work inside the cellRenderer unless it's another component.

Old Answer:

This is the ag-grid way to do that

cellrenderer: (params: ICellRendererParams) => {
   const isChecked = isFunDone(params.value) ? ' checked': ''; //string
   return `<input type="checkbox"${ isChecked }`;
}

// external function accepting any as I dont know your datatype
isFunDone(data: any) {
 return (data === good.value);
}