spacebars: how to use and / or in if statements

meteor spacebars
Simpanoz picture Simpanoz · Feb 10, 2015 · Viewed 9k times · Source

I have following code:

 <div class="form-group {{#if afFieldIsInvalid name='latitude' OR name='longitude'}}has-error{{/if}}">......</div>

How can I use AND/OR in if conditions of spacebars templates ?

Answer

Peppe L-G picture Peppe L-G · Feb 10, 2015

Spacebars can't handle logical expressions, so you need to create a helper handling the calculations for you.

Actually, you can achieve and functionality with nested ifs like this:

{{#if condition1}}
    {{#if condition2}}
        <p>Both condition hold!</p>
    {{/if}}
{{/if}}

And or like this:

{{#if condition1}}
    <p>One of the conditions are true!</p>
{{else}}
    {{#if condition2}}
        <p>One of the conditions are true!</p>
    {{/if}}
{{/if}}

But I would prefer using a helper.

Related questions

How can I get the index of an array in a Meteor template each loop?

Say I have an object, someObject: { foo: "apple", myArray: ["abc", "def"] } And a template helper that looks like this (and works fine): getArray: function(){ var self = this; self.myArray = self.myArray || []; return self.myArray; } How should I construct the html …

Read More
Meteor: Access Template Helper (or variable) from another helper

How can I reference a template helper from another one? For example... Template.XXX.helpers({ reusableHelper: function() { return this.field1 * 25 / 100; //or some other result }, anotherHelper: function() { if (this.reusableHelper() > 300) //this does not work return this.reusableHelper() + ' is greater …

Read More
How can I use if condition on the meteor template?

I want to use an if condition in a Meteor Blaze template. Let's say you have a helper users on the Users collection you want to iterate through tasks and if the username is admin, use a "red" style: <…

Read More