Say we have a parent template and a child template:
<template name="parent">
{{> child }}
</template>
<template name="child">
{{#if show}}
//Do something
{{/if}}
</template>
If we assign 'show' to the parent template:
if (Meteor.isClient){
Template.parent.show = function(){
return Session.get('isShowing');
}
}
Is there any way for the child template to have access to it?
Edit
You could make a universal handlebars helper so you could use Sessions values anywhere in your html:
Client js
Handlebars.registerHelper('session', function(key) {
return Session.get(key);
});
Client HTML
<template name="child">
{{#if session "show"}}
//Do something
{{/if}}
</template>
Similarly, you could also use {{session "show"}} / {{#if session "show"}} in your parent template and not have to use the Template.parent.show helper anymore.
Regarding the use of ../ notation. There are certain scenarios it may not work: https://github.com/meteor/meteor/issues/563. Basically it works within {{#block helpers}} but not with templates, but it would work in a block helper if it contains a subtemplate.
<template name="child">
{{#if ../show}}
Do something
{{/if}}
</template>
You can also register a common helper :
Template.registerHelper('isTrue', function(boolean) {
return boolean == "true";
});
And call it just like that in your html:
<input type="checkbox" checked="{{isTrue attr}}"/>
Related
I have a template
{{#if currentUser}}
<input id="datetimepicker" type="text" >
{{/if}}
I want do add
$('#datetimepicker').datetimepicker();
But in methods of template:
onCreated
onRendered
content of {{#if currentUser}} is not accessible because collection with user is loaded after template. I can use setTimeout, but this is non stable solution. I can to type in template
{{#if currentUser}}
<input id="datetimepicker" type="text" >
<script>
$('#datetimepicker').datetimepicker();
</script>
{{/if}}
but this is not elegant.
How to catch rendering of content in block {{if currentUser}} in correct way? Or maybe should I not use this syntax generally and there is other manner of checking is user is loaded. If yes, link to proper tutorial please.
The way to do this is to make the content of the if another template, and then use the onRendered or onCreated methods of that template.
{{#if currentUser}}
{{> datePicker}}
{{/if}}
...
<template name="datePicker">
<input id="datetimepicker" type="text" >
</template>
JS:
Template.datePicker.onCreated(() => {
// something
});
#Christian Fritz's answer works well.
In case you don't want to create a new template because of some other issues, you can also try this in the onRendered callback:
Tracker.autorun(function() {
if ($('#datetimepicker')[0]) {
$('#datetimepicker').datetimepicker();
}
});
I’d like to find a conditionally rendered element after the template is rendered.
The template:
<template name="one">
<div class="normal">Normal</div>
{{#if active}}
<div class="conditional">Conditional</div>
{{/if}}
</template>
The code:
Template.one.onRendered(function() {
console.log(this.find(".normal"));
console.log(this.find(".conditional");
}
The above will log the ‘.normal’ but null for the ‘.conditional’ (the condition is true, both elements are present in the final DOM). The reason for that is well documented: onRender runs before {{#if}}s. But I want to run after the whole template is rendered, with all its {{#if}}s.
Is there a way to find that .conditional without making it a separate template?
I'm facing the same issue. This is because what's inside the {{#if}} block is rendered as a dynamically generated template.
So, the best workaround I've found so far is to render a specific template inside the {{#if}} block and add a callback to this specific template:
Here's what you should do:
<template name="one">
<div class="normal">Normal</div>
{{#if active}}
{{> activeTemplate}}
{{/if}}
</template>
<template name="activeTemplate">
<div class="conditional">Conditional</div>
</template>
Template.activeTemplate.onRendered(function() {
console.log(this.find(".conditional");
}
You won't find the DOM element because it doesn't exist.
It doesn't exist because active is false.
If you want active to return true:
Template.one.helpers({
"active": function() { return true; }
})
I am trying to assign values within a template, the idea is to do something like this:
{{#if author}}
{{className = 'classA'}} <- trying to implement this line.
{{else}}
{{className = 'classB'}}
{{/if}}
<div class={{className}}></div>
Is it possible to do so without registerHelper?
I needed this solution solved in the same way the original poster expected. Therefore I created a helper function to do this for me.
function setVariable(varName, varValue, options){
options.data.root[varName] = varValue;
};
Contained within the options in the helper, is the data block, with the root of the helper variables.
I placed my variable within the root object, either assigning or overwriting with the value provided.
The helper in html looks a lot like this.
{{setVariable "thisVar" "Contents Here"}}
<div>
{{thisVar}}
</div>
You can do this with a partial.
partial:
<div class="{{classname}}">{{var1.author}}</div>
template:
{{#if author}}
{{> mypartial var1=. classname="classA"}}
{{else}}
{{> mypartial var1=. classname="classB"}}
{{/if}}
In this example I've passed the current scope as var1. I can't recall if the scope stays the same and the new variable is just added to it or if you have to pass the scope manually.
Small update from a helpful above answer. In Handlebars 4.x, it seems we have to get the variables from #root.
handlebars.registerHelper('assign', function (varName, varValue, options) {
if (!options.data.root) {
options.data.root = {};
}
options.data.root[varName] = varValue;
});
And then,
{{assign 'imageTag' 'drop-155'}}
{{#root.imageTag}}
{{#if author}}
<div class='{{ classA }}'></div>
{{else}}
<div class='{{ classB }}'></div>
{{/if}}
or try
<div class='{{#if author}} {{ classA }} {{else}} {{ classB }} {{/if}}'></div>
or maybe this
create a script
<script>
$(function(){
var class;
{{#if author}}
class = {{ classA }}
{{else}}
class = {{ classB }}
{{/if}}
var $specials = $('.special');
$specials.removeClass('special');
$specials.addClass(class);
})
</script>
I'm new with meteor and at the moment i'm testing out nested templates. More specific, i'm trying to get this pseudo switch working.
I have a PARENT template that gets data from a template.helper function where it gets the data for the {{#each}}.
This is the PARENT template
<template name="result">
{{#each Tresult}}
<div class="jow">
<h3>{{name}}</h3>
<p>{{type}}</p>
<div>{{> Tstatus}}</div>
</div>
{{/each}}
</template>
The PARENT also includes another template {{> Tstatus}}
This is the CHILD template
<template name="Tstatus">
{{#status_is "green"}}
{{> Tstatus_green}}
{{/status_is}}
{{#status_is "red"}}
{{> Tstatus__red}}
{{/status_is}}
{{#status_is "orange"}}
{{> Tstatus__orange}}
{{/status_is}}
</template>
<template name="Tstatus_green">
<span>green</span>
</template>
<template name="Tstatus_red">
<span>red</span>
</template>
<template name="Tstatus_orange">
<span>orange {{number}}</span>
</template>
This template can also include 3 other templates:
Tstatus_green
Tstatus_red
Tstatus_orange
But the problem is, how do i get this pseudo switch working. So i only need to include 1 of the 3 templates, based on it's status color.
And this is the helper function for the PARENT template
Template.result.helpers({
Tresult:function(){
return Ttable.find()
}
})
I would do something like this:
Template.Tstatus.helpers({
getStatusColor:function()
{
//"this" will be the current Ttable document
var color = getColorFunction(this)
return Template["Tstatus_"+color]
}
})
<template name="Tstatus">
{{#with getStatusColor}}
{{>.}}
{{/with}}
</template>
I have three simple Templates in Meteor, and a Collection on the server with any combination of their names. I want to be able to render these templates dynamically based on which of their names are in the Collection.
Currently I am trying to accomplish this by using the client to subscribe to the Collection, and access the names through a template function. Unfortunately, if I try to run ">" on the names, Meteor attempts to render the variable name instead of the Template pointed to by its value.
So instead of rendering the html in template1, template2, and template3, the output is merely their names on the page: "template1 template2 template3".
Here is the code I've been using, I hope there's a way to solve my issue without having to run Meteor.render manually.
Server js:
TemplatesToRender = new Meteor.Collection("templatesToRender");
TemplatesToRender.insert({templateName: "template3"});
TemplatesToRender.insert({templateName: "template2"});
Client html:
<body>
{{#each templatesToRender}}
{{> templateName}} // meteor trying to render a template
// called "templateName" instead of the
// variable inside templateName.
{{/each}}
</body>
<template name="template1">
<span>Template 1</span>
</template>
<template name="template2">
<span>Template 2</span>
</template>
<template name="template3">
<span>Template 3</span>
</template>
You can make a render helper:
Handlebars.registerHelper('render', function(name, options) {
if (Template[name])
return new Handlebars.SafeString(Template[name]());
});
And use it with
{{render templateName}}
You might want to try this
in your html
<body>
{{> templateToRender}}
</body>
<template name="templateToRender">
{{! use below to detect which template to render}}
{{#if templateName "template1"}}
{{> template1}}
{{/if}}
{{#if templateName "template2"}}
{{> template3}}
{{/if}}
{{#if templateName "template3"}}
{{> template3}}
{{/if}}
</template
<template name="template1">
<p>this is template1</p>
</template>
<template name="template2">
<p>this is template2</p>
</template>
<template name="template3">
<p>this is template3</p>
</template>
in your script
Template.templateToRender.templateName = (which) ->
# if user have a field like templateName you can do things like
tmplName = Meteor.user().templateName
# Session.equals will cause a template render if condition is true.
Session.equals which, tmplName
Meteor 1.0 just came out today, and I just want to update this for 2014 :)
https://docs.meteor.com/#/full/template_dynamic
{{> Template.dynamic template=template [data=data] }}
Sample Usage:
{{#each kitten}}
{{> Template.dynamic template=kitten_type data=this }}
{{/each}}