RactiveJS模板条件HTML

Question

I am trying to have HTML appear conditionally in ractive template with no success.

As you can see in this JSFiddle the result is not as expected - table is a single row.

My template:

<table border="1">
    <tr>
    {{#list:num}}
        <td>{{.}}</td>
        {{#if num > 0 && num % 2 == 0}}
               </tr><tr>  
        {{/if}}
    {{/list}}
    </tr>
</table>

My Javascript:

var ractive = new Ractive({
    el: "#cont",
    template: "#template",
    data: {
        list: [1, 2, 3, 4, 5, 6]
    }
});

Answer 1

Unlike traditional templating systems, where you're generating an HTML string, each section of a Ractive template must be valid in its own right, otherwise it's impossible to construct the virtual DOM. That means that you can't have </tr><tr> inside a section. (Really, the parser should throw an error - I've raised an issue on GitHub .)

A different approach would be to group the items, and iterate over the groups:

 var ractive = new Ractive({ el: "#cont", template: "#template", data: { list: [1, 2, 3, 4, 5, 6] }, computed: { grouped: function () { var list = this.get( 'list' ), grouped = [], group; group = []; grouped.push( group ); list.forEach( function ( item, i ) { if ( i > 0 && i % 2 == 0 ) { group = []; grouped.push( group ); } group.push( item ); }); return grouped; } } }); 

 <script src="http://cdn.ractivejs.org/0.6.0/ractive.js"></script> <script type="text/html" id="template" > <table border="1"> {{#each grouped}} <tr> {{#each this}} <td>{{.}}</td> {{/each}} </tr> {{/each}} </table> </script> <div id="cont"></div>