sync between attributes and properties

> But there are exclusions, for instance input.value synchronizes only from attribute → to property, but not back:

I don't know is it worth or not to mention (as a side note) that the sync between attributes and properties is *not* going to happen *after* a property is assigned directly. Example
```javascript
let inp = document.getElementById('search');
inp.setAttribute('value','initialValue');
inp.value === 'initialValue'; //true
inp.setAttribute('value','changedValue via setAttribute');
inp.value === 'changedValue via setAttribute'; // true;
inp.value = 'cancel all consecutive attempts to sync via setAttribute';
inp.value === 'cancel all consecutive attempts to sync via setAttribute'; // true
inp.setAttribute('value','has no effect on input.value');
inp.value === 'has no effect on input.value'; // false
inp.value === 'cancel all consecutive attempts to sync via setAttribute'; // true
```
[go to the website](https://javascript.info/dom-attributes-and-properties#property-attribute-synchronization)

從連結的 DOM attributes 和 properties 區段開始，尤其是 property-attribute synchronization 範例。釐清直接指定 input.value 後文件所述的行為，然後在單向同步的注意事項應放在該區段時更新該區段；完成的標準是範例準確解釋為什麼之後呼叫 setAttribute 不會變更 input.value。

由索引模型根據 Issue 內容生成。