handlebars.js

问题 I have a handlebars template that contains: {{^is mymodel.someproperty}} I don't understand what the significance of the caret symbol is. I've searched around, the only place I'm seeing it is on Handlebars Expressions It's used like so: {{#each nav}} <a href="{{url}}"> {{#if test}} {{title}} {{^}} Empty {{/if}} </a> {{~/each}} What does "{{^" mean in handlebars? It sort of looks like a .NOT. or .ELSE. or something like that. -Eric 回答1: The reason it's not in the handlebars doc is because it's

问题 Is there a way to extend templates like in Django? My base template has a header that only needs to be a few pages. I'd like to change that for the the other templates. Something similar to {% extends "base.html" %} ... {% endblock %} I'm using Ember.js. 回答1: As far as i know this notation does not exist, also i haven't seen the concept of inheritance on handlebars templates layer. However, i can think of two ways to achieve what you want, 1. using the {{partial}} helper http://emberjs.com

问题 Im very new to Meteor but so far Im really enjoying coding on the platform. I have come up against a bit of hurdle and cant seem to find the correct way. I want to create a helper function that will check lat and long and check it against some predefined range if it falls in between these it returns true. I have included the code I currently have: Template.header.helpers({ locationCheck: function() { navigator.geolocation.getCurrentPosition(success_callback,error_callback); function success

问题 Currently, if we define our view as {{#view App.myView}} , ember/handlebars will wrap the view element inside a <div id="ember-1234" class='ember-view'> . Is there a way to stop this? 回答1: You probably want to set tagName as ''. App.MyView = Em.View.extend({ tagName: '' }); At least it stops wrapping inner contents. 回答2: If you want to customize view element's id, you can use: {{#view App.myView id="my-id"}} 回答3: I usually think my views as wrapper. For example, if the initial given html code

问题 In a handlebars template, how do you set a radio button group to the right value using only the template? Can this be done directly in the template? For an example, let's say there's a radio button group like this: <label><input type="radio" name="mode" value="auto">Auto</label><br> <label><input type="radio" name="mode" value="on">On</label><br> <label><input type="radio" name="mode" value="off">Off</label><br> The data coming into the template has a value for mode: {mode: "on"} I want to

问题 Is it possible to perform boolean logic within a handlebars conditional? Right now I spoof this behavior with a controller function, so I end up with the controller App.ApplicationController = Ember.Controller.extend({ bool1: true, bool2: true, both: function(){ return this.bool1 && this.bool2; }.property('content.both'), }); Which allows me to use a handlebars template of <script type="text/x-handlebars"> {{#if both}} <p> both were true </p> {{/if}} </script> and that works fine, but raises

问题 I'm using SendGrid online "Design" template, with a module "code". In their documentation (https://sendgrid.com/docs/ui/sending-email/editor/#code-modules), they say that de code editor does not modify or validate any HTML . If I write this piece of code inside the code module: <ul> {{#each items}} <li>test</li> {{/each}} </ul> <table> <tbody> {{#each items}} <tr> <td>Col 1</td> <td>Col 2</td> </tr> {{/each}} </tbody> </table> it results in: <ul> {{#each items}} <li>test</li> {{/each}} </ul>

问题 When I try to pass an Ember binding or computed property to a custom Handlebars helper, the helper receives the string instead of the value. How do I get the value into the helper? The template: {{my_helper my.binding}} The helper receives "my.binding" instead of the corresponding value. 回答1: A few days ago a push on the master solved the problem : use Ember.Handlebars.registerBoundHelper. Ember.Handlebars.registerBoundHelper('myHelper', function(myBinding, options) { return myDealWith

问题 I want to try use: {{#each content as |product index|}} {{index}} {{/each}} But my app has the itemContoller, like this: {{#each product in content itemController='product'}} If I set this: {{#each content as |product index| itemController='product'}} It doesn't work! I found all of the ember guides and did not find the answer. Any help please. 回答1: Controllers ( Object , Array and itemController ) are going away. The new way to do things is by using a component. So, instead of your item