Is there a way to check if a specific Template has been rendered, other than by using Sessions, i.e. the Template is accessible for other external functions to use?
A good example is that I want to use Blaze.renderWithData, but need to know that the Template is availabel beforehand.
If you want to see if a template has been rendered, put a flag in the onRendered callback. If you don't like Session vars use a reactive var or dict & include the inverse in the onDestroyed. Store that reactive-whatever under your package object's global. As an alternative, if you know where it might be rendered to, you can use Blaze.getView on the element where it should appear and if it returns, you know you have it, e.g. Blaze.getView($('.foo')[0])
Also consider asking yourself why you can't use spacebars or embed the rendering directly in the onRendered callback. Using Blaze.renderWithData is fairly uncommon.
Related
Is there any way to detect when the {{>Template.dynamic template=content}} changes and then run some functions ?
You can wrap your functions in a template.autorun() block, in the dynamic template you are rendering (in his rendered function) .
If you need to follow it from outside, you can use the tracker Deps feature: you declare the change in the autorun block.
I have Meteor application that uses Iron-Router in which the rendered screen is dynamic based on the URL.
I have two parameters from the URL, station and screen.
In the routing code:
this.render(stationParam+screenParam, {to: 'content'});
However, I want to be able to check if the template stationParam+screenParam exists.
Is this possible?
All templates are stored as a field of a global object, Template. The question then is: How to check if this global object has a given field?
You have multiple ways to do it. My personal favourite using underscore:
if (_.has(Template, stationParam + screenParam)) { /* ... */ }
Underscore is included in Meteor. If you want to use it in a package, don't forget the api.use('underscore') in your describe callback.
See also: Determining if a javascript object has a given property
In Meteor, if the below is my HTML,
<template name="myTemplate">
The value is {{value}}
</template>
I can define the value in two ways
Template.myTemplate.helpers
value: ->
'insideHelper1'
Template.myTemplate.value =
'outsideHelper1'
The first way is using helpers as documented here (http://docs.meteor.com/#template_helpers) whereas the second way is using the Live Template examples as defined here (http://docs.meteor.com/#livehtmltemplates)
Just wondering, what is the difference between the two and when should I use one over the other?
They're exactly the same.
If you use .helpers, it actually just adds it to Template..
It depends on your coding style. You may prefer to use .helpers since it makes cleaner code if you have many helpers on the same template.
One small technically way they're different is Template.helpers adds the helpers to your Meteor app when your Meteor app starts up, whereas using the Template.helpername adds it before. So if you need to overwrite any helpers, you could use the .helpers method. The one that runs last will have the active helper.
Is there a way to include an existing dom-element through Handlebars, while being able to keep a reference to said dom-element?
to explain:
I have a jquery-element $el of which I want to include the dom-element ($el[0]) in a handlebars template.
I have some jquery code that uses $el.html("new stuff") after handlebars has included the template (again: this template contains $el[0]
The usual solution would be to rewrite the code by providing a selector so jquery can access the element. However, the code that needs to change $el doesn't know where in the template $el[0] will be used, since this is configurable. Having to specify the selector by config is possible obviously but this doesn't really feel dry to me.
So, any way to do this?
I implemented this with a handlebars helper that injects a unique id and post-render keeps a ref from uniqueid -> element to bind.
On postrender I simply find the elements with the unique-ids and update each element to it's mapped el to bind.
Greeting,
I am stuck with accessing $scripts variable of html.tpl.php in page.tpl.php, how to access the variable?
I am using Drupal 7
Please Help.
Thanks in Advance.
In order to alter the page's scripts, take a look at implementing hook_js_alter() in a custom module. That will allow you to perform the necessary alterations without messing with the rendered output. Further info here.
You must send explicity the variable you want to the template you want, template variables are template specific, there's no inheritance or another clean way.
The clean way is send what you need to specific template or implement a hook if it exists and does what you want.
Finally, in this case, I think you have to decide which files are loaded when hook_js_alter is called as suggested jamix.