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Cyril Auburtin (2017-10-28T19:56:49.000Z)
extending Set is possible

```js
class SetWithToggle extends Set {
toggle(value, force = !this.has(value)) {
if (force) {
this.add(value);
} else {
this.delete(value);
}
return this;
}
};
```

2017-10-28 17:15 GMT+02:00 Cyril Auburtin <cyril.auburtin at gmail.com>:

> It would help to avoid this scenario:
> ```js
> if (cond) {
>   set.add(x);
> } else {
>   set.delete(x);
> }
> // set.toggle(x, cond);
> ```
>
> It's similar to Element's classList
>
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cyril.auburtin at gmail.com (2017-10-29T10:59:09.375Z)
extending Set is possible

```js
class SetWithToggle extends Set {
  toggle(value, force = !this.has(value)) {
    if (force) {
      this.add(value);
    } else {
      this.delete(value);
    }
    return this;
  }
}
```

2017-10-28 17:15 GMT+02:00 Cyril Auburtin <cyril.auburtin at gmail.com>:
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