How to create a underscore template dynamically?

How to partially substitute an Underscore.js template, or how to create a template from a template

• I would create a master template for generating other templates. The only method I found is this one: var test_tpl_master = _.template( "StackOverflow <%= type %> question number <%= num %>" ); var test_tpl_1 = _.template(test_tpl_master({ "type": "good", "num": "<%= num %>" })); var test_tpl_2 = _.template(test_tpl_master({ "type": "stupid", "num": "<%= num %>" })); Is there not a more simple and elegant way?

• Answer:

  You can create a function that will act as a proxy to your master and will fill the the variables you want. For example, let's say you have var prefill_template = function(tpl, defs) { return function(data) { return tpl(_.extend({}, data, defs)); } } You can then create your subtemplates functions by var test_tpl_1 = prefill_template(test_tpl_master, { "type": "good" }); var test_tpl_2 = prefill_template(test_tpl_master, { "type": "stupid" }); and use them as any other template : console.log(test_tpl_1({ num: 1 })); console.log(test_tpl_2({ num: 1 })); And a demo http://jsfiddle.net/nikoshr/qshb1zrx/