Do-Expressions are still floating around Stage 0, there’s no guarantee that they will be incorporated into the language.
The feature is implemented in v8 behind a flag, and can be used in Chrome
Canary by launching the browser with `—js-flags=“—harmony-do-expressions”`,
which would enable you to try it out.
**INTERMISSION — Slightly more on-topic portion of post follows after a short
coffee break**
However, to answer your question, you can implement an
immediately-invoked-function-expression, like this:
```js
`Hello ${_ => {
if (a == 2) {
console.log(‘world’);
}
}()}`;
```
So this wouldn’t depend on the Do-Expressions proposal, and wouldn’t require a
keyword per se, although you’d still have some extra tokens making things a bit
harder to read.
It’s unlikely that the grammar would be changed to accommodate this use case,
given that people are using template literals already, and the use-case is
already supported by other means.
> On Jan 10, 2016, at 9:23 PM, Manuel Di Iorio <[email protected]> wrote:
>
> Hi, I asked around and somebody said that there will be the possibility to
> execute arbitrary code inside the template tags, using the 'do' keyword in
> this example way:
>
> `Hello ${ do if (a == 2) {
> console.log(' world');
> } }`
>
> Is there the possibility in future to implement that feature without the
> keyword?
> What is the plan (read 'estimated date') for the rollout of this feature ?
>
> The idea to develop in native way a good templating engine is exciting and
> I'm looking forward for its complete implementation :)
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