canjs/canjs

We CAN build the impossible! https://codepen.io/justinbmeyer/pen/yEGGoK

Alexis Abril

@alexisabril

in “field”, there was a switch that would render some template

Chris Gomez

@akagomez

@daffl It creates the DOM, but doesn’t initialize the component:

controller: function (options) {
      var frag = can.view.stache(
        '<can-import from="src/controller/landing/landing" />' +
        '<landing-controller></landing-controller>')();

      return frag;
    }

It even imports the script. But I get the error: WARN: can/view/scanner.js: No custom element found for landing-controller

Chris Gomez

@akagomez

I think the context of the <can-import> and the context of the rendered component are different.

@alexisabril @daffl This works though:

// controller.stache
<can-import from="src/controller/landing/landing" />
{{#controller}}{{/}}

// controller.js
controller: function (options) {
      var frag = can.view.stache(
        // '<can-import from="src/controller/landing/landing" />' +
        '<landing-controller></landing-controller>')();

      return frag;
    }

Chris Gomez

@akagomez

Is there a way to set the context of a rendered template?

Matthew Phillips

@matthewp

can-imports have to be loaded up front (like with the stache plugin)

but that to work

in 2.3.0-pre.x you can nest your component inside of the can-import

but you need to use {{#isResolved}}<landing-component/>{{/isResolved}}

because the can-import viewmodel is a promise

@akagomez the context of a renderered template is the first argument for a renderer

can.view.stache(txt) returns a renderer function

render(viewmodel)

Patrick Clancy

@patrickclancy

WebSocket connection to 'ws://localhost:8012/' failed

Opps… ignore

Matthew Phillips

@matthewp

heh

that's live-reload i bet

Patrick Clancy

@patrickclancy

yea… didn’t mean to paste my error here. But I am working through it

Justin Meyer

@justinbmeyer

@akagomez not with can.stache

can.stache needs to create elements in clone-able fragments

what you show is possible, but would be tricky

is possible to make stache do, but not easily

instead, I do what @alexisabril and have a helper

Andrei Balmus

@abalmush

Hello guys, quick question: Is it possible to attache can.Component to an existing custom tag without can.view ?

Chris Gomez

@akagomez

@abalmush As far as I know, no.

Andrei Balmus

@abalmush

@akagomez, thank you so much

Matthew Phillips

@matthewp

that's because you've overwritten parent.prototype.define

whoops, i just responded to a comment from a few days ago

carry on

Justin Meyer

@justinbmeyer

@ilyavf asked:

3:18 PM
Do you know why this setter is called twice after a template binding is added? http://jsbin.com/sinunew/edit?js,console,output

Ilya Fadeev

@ilyavf

Yeah, thanks @justinbmeyer . Click update to see it. If you remove the binding declaration from the template, the setter is called once.

Justin Meyer

@justinbmeyer

@ilyavf so is the button or anything related to this?

like, does there even have to be a component?

to see the problem

could you just pass a map with similar defined behavior?

Ilya Fadeev

@ilyavf

ok, will do

like, with a bind() ?

Justin Meyer

@justinbmeyer

oh, I have to click update to see the problem?

Ilya Fadeev

@ilyavf

yes, u have to click

Justin Meyer

@justinbmeyer

this is most likely b/c of the two-way binding

clicking update changes child's searchTerms, which changes parent's myval, which again tries to change child's searchTerms

although, we do try to prevent this: https://github.com/bitovi/canjs/blob/master/component/component.js#L226

oh, those only track one direction

we might need to add the other direction

viewModelPropertyUpdates[searchTerms] will be true only after parent's myval changes

we could have a similar protection coming back the other way

Justin Meyer

@justinbmeyer

basically when parent CHANGES child ... we protect against child then changing the parent

but when child CHANGES parent ... we don't currently protect the parent from trying to change the child as a result

Ilya Fadeev

@ilyavf

what line would this be ("when child changes parent")?

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