val 属性不起作用，因为< select> 从<选项> 获取其值> s具有选择的属性。我对Mustache不太熟悉，但应该工作：

The val attribute doesn't work, because a <select> takes its value from the <option>s which have the selected attribute. I'm not very familar with Mustache, but this should work:

// snip...        
var html = Mustache.to_html(template, data);
$(html)
    .find('option[value=3]').attr('selected', true)
    .end().appendTo('body');

我认为您使用的模板不是惯用的Mustache—它太粗糙了;你实际上并没有模仿任何东西。像这样的东西可能更多Mustache-y：

I think that the template you're using is not idiomatic Mustache — it's too coarse grained; you're not actually templating anything. Something like this might be more Mustache-y:

var template = '<select>{{#options}}' +
                   '<option value="{{val}}" {{#sel}}selected{{/sel}}>' + 
                       '{{txt}}' + 
                   '</option>' + 
               '{{/options}}</select>',

    data = {options: [
        {val: 1, txt: 'uno'},
        {val: 2, txt: 'dos'},
        {val: 3, txt: 'tres', sel: true}
    ]};

var html = Mustache.to_html(template, data);

$(html).appendTo('body');

演示&＃x2192;