fix: always treat spellcheck and draggable as attributes

fix #1350

packages/runtime-dom/src/patchProp.ts

@@ -34,7 +34,15 @@ export const patchProp: RendererOptions<Node, Element>['patchProp'] = (
  patchEvent(el, key, prevValue, nextValue, parentComponent)
  }
  } else if (
- isSVG
+ // spellcheck and draggable are numerated attrs, however their
+ // corresponding DOM properties are actually booleans - this leads to
+ // setting it with a string "false" value leading it to be coerced to
+ // `true`, so we need to always treat them as attributes.
+ // Note that `contentEditable` doesn't have this problem: its DOM
+ // property is also enumerated string values.
+ key !== 'spellcheck' &&
+ key !== 'draggable' &&
+ (isSVG
  ? // most keys must be set as attribute on svg elements to work
  // ...except innerHTML
  key === 'innerHTML' ||
@@ -43,7 +51,7 @@ export const patchProp: RendererOptions<Node, Element>['patchProp'] = (
  : // for normal html elements, set as a property if it exists
  key in el &&
  // except native onclick with string values
- !(nativeOnRE.test(key) && isString(nextValue))
+ !(nativeOnRE.test(key) && isString(nextValue)))
  ) {
  patchDOMProp(
  el,