Function isRef

packages/shared/src/toDisplayString.ts:16–18

(val: any)

// can't use isRef here since @vue/shared has no deps
const isRef = (val: any): val is { value: unknown } => {
  return !!(val && val[ReactiveFlags.IS_REF] === true)
}

/**
 * For converting {{ interpolation }} values to displayed strings.