fix(runtime-core): unable to set object to dom props

packages/runtime-dom/__tests__/patchProps.spec.ts

@@ -7,7 +7,7 @@ describe('runtime-dom: props patching', () => {
  patchProp(el, 'id', null, 'foo')
  expect(el.id).toBe('foo')
  patchProp(el, 'id', null, null)
- expect(el.id).toBe('')
+ expect(el.id).toBe('null')
  })
 
  test('value', () => {
@@ -30,6 +30,16 @@ describe('runtime-dom: props patching', () => {
  expect(el.multiple).toBe(false)
  })
 
+ // #1049
+ test('object prop', () => {
+ const el = document.createElement('video')
+ const object = {}
+ const set = jest.fn()
+ Object.defineProperty(el, 'srcObject', { enumerable: true, set })
+ patchProp(el, 'srcObject', null, object)
+ expect(set).toHaveBeenCalledWith(object)
+ })
+
  test('innerHTML unmount prev children', () => {
  const fn = jest.fn()
  const comp = {

packages/runtime-dom/src/modules/props.ts

@@ -32,6 +32,6 @@ export function patchDOMProp(
  // e.g. <select multiple> compiles to { multiple: '' }
  el[key] = true
  } else {
- el[key] = value == null ? '' : value
+ el[key] = value
  }
 }