Add support for arbitrary code inside template tags

[manuel-di-iorio]

Why not support any arbitrary code inside template strings expressions?

This is not supported i.e:

`${ if (a == 2) {
    console.log('hi');
} }`

And with more complex code, like if, if-else, for loops, etc..

It would be nice to develop a template engine that uses this native approach instead of a string manipulation.

[michaelficarra]

Do-expressions will allow this:

`${ do if (a == 2) {
    console.log('hi');
} }`

[michaelficarra]

Do-expressions will allow this:

`${ do if (a == 2) {
    console.log('hi');
} }`

[manuel-di-iorio]

Awesome! Can I ask why the do keyword ?
And something like the following will be supported?

`${ Hello do if (a == 2) {
    console.log(' world');
} }`
//will output: Hello world

[manuel-di-iorio]

Awesome! Can I ask why the do keyword ?
And something like the following will be supported?

`${ Hello do if (a == 2) {
    console.log(' world');
} }`
//will output: Hello world

[michaelficarra]

No, not at all. There's many things wrong with what you've written. "Hello " needs to be a literal part of the template, the completion value of the if statement is either null (the return value of console.log) or undefined, and in order to see the value produced by the template, it all needs to be within the argument list for console.log.

It seems you are very unfamiliar with JavaScript. I would recommend asking questions like this on Stack Overflow or some other medium. This issue tracker is meant for a different kind of discussion.

[michaelficarra]

No, not at all. There's many things wrong with what you've written. "Hello " needs to be a literal part of the template, the completion value of the if statement is either null (the return value of console.log) or undefined, and in order to see the value produced by the template, it all needs to be within the argument list for console.log.

It seems you are very unfamiliar with JavaScript. I would recommend asking questions like this on Stack Overflow or some other medium. This issue tracker is meant for a different kind of discussion.

[domenic]

Per https://github.com/tc39/ecma262/blob/master/CONTRIBUTING.md#feature-requests, closing this. @michaelficarra perhaps in the future redirect to StackOverflow sooner instead of indulging people :)

[domenic]

Per https://github.com/tc39/ecma262/blob/master/CONTRIBUTING.md#feature-requests, closing this. @michaelficarra perhaps in the future redirect to StackOverflow sooner instead of indulging people :)

[manuel-di-iorio]

Sorry previously I made a typo.. I meant:

`Hello ${ do if (a == 2) {
    console.log(' world');
} }`

@michaelficarra nope I already asked on SO and they redirected me here.. However the issue is now closed and I'm happy with the feature proposal. Hope to see its availability as soon as possible :)

[manuel-di-iorio]

Sorry previously I made a typo.. I meant:

`Hello ${ do if (a == 2) {
    console.log(' world');
} }`

@michaelficarra nope I already asked on SO and they redirected me here.. However the issue is now closed and I'm happy with the feature proposal. Hope to see its availability as soon as possible :)

[h4ckninja]

I'm not the micheal you are looking for. :)

[h4ckninja]

I'm not the micheal you are looking for. :)