Preserving the name binding in Ractive's radio button functionality

Is there a way to bind a ractive variable to a radio button without showing the curly brackets in the HTML? The simplest method is to use

<input type="radio" name="{{myVar}}" value="1" checked>

but I want it to output as

<input type="radio" name="myVar" value="1" checked>

without changing form handling. I attempted to use logic like this:

<input type="radio" name="myVar" value="1" {{#myVar==1}}checked{{/myVar==1}}

but it didn't work.

Additionally, is there a way to bind it as a numeric value instead of a string? For example, with data:

data:{myVar:1}

the radio button remains unchecked.

javascriptractivejs

Answer №1

Ractive includes the curly braces in input names as a precaution against the slim chance of a conflict between name='{{myVar}}' and name='myVar' - for no other reason. The binding is established during rendering; what happens to the name afterwards is inconsequential.

While you can't prevent the curly braces from being added initially, you can certainly modify them later:

ractive.findAll('input[type="radio"]').forEach( function(input) {
  input.name = input.name.replace('{{','').replace('}}','');
});

If you were creating a component with Ractive.extend(), this adjustment could be integrated into the init() method, for instance.

There shouldn't be any issue with numerical values, at least up to the latest released version (0.3.9) and the present development version (0.4.0). Check out this fiddle for a demonstration: http://jsfiddle.net/rich_harris/7qQZ8/

Answer №2

In my opinion, achieving your desired outcome may prove challenging.

Ractive operates radio buttons in a distinct manner compared to traditional HTML markup. It anticipates that you will need to determine which radio button is selected using a predefined variable, and it depends on the name attribute for this functionality. More specifically, Ractive requires you to designate the same specific variable (e.g. "{{myVar}}") as the value for the name attribute across all radio buttons within a group. Consequently, it automatically assigns the value of the value attribute of the selected individual radio button to that variable.

For instance, if your code looks like this:

<label><input type='radio' name='{{myVar}}' value='1' checked> 1</label>
<label><input type='radio' name='{{myVar}}' value='2'        > 2</label>
<label><input type='radio' name='{{myVar}}' value='3'        > 3</label>
<p>The selected value is {{myVar}}.</p>

Then, Ractive will automatically update the <p> element with the relevant information based on the selected radio button.

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