Function setChecked

packages/runtime-dom/src/directives/vModel.ts:165–188

(
  el: HTMLInputElement,
  { value, oldValue }: DirectiveBinding,
  vnode: VNode,
)

}

function setChecked(
  el: HTMLInputElement,
  { value, oldValue }: DirectiveBinding,
  vnode: VNode,
) {
  // store the v-model value on the element so it can be accessed by the
  // change listener.
  ;(el as any)._modelValue = value
  let checked: boolean

  if (isArray(value)) {
    checked = looseIndexOf(value, vnode.props!.value) > -1
  } else if (isSet(value)) {
    checked = value.has(vnode.props!.value)
  } else {
    if (value === oldValue) return
    checked = looseEqual(value, getCheckboxValue(el, true))
  }

  // Only update if the checked state has changed
  if (el.checked !== checked) {
    el.checked = checked
  }
}

export const vModelRadio: ModelDirective<HTMLInputElement> = {
  created(el, { value }, vnode) {