Angular : show value without update

I want to show value of variable with initial status. I dont want to show update when value is changed

<span>{{value}}</span>

Something like this, but without updating this span when value is changed

.ts:

valueThatWontChange: any

ngOnInit() {
  this.valueThatWontChange = this.value
}

.html:

{{ this.valueThatWontChange }}