Handlebars.js templates engine custom IF condition helper. Allows to compare values one to each other like you are used to in programming.

handlebars.helpers.ifEquals.js

// Compares first value to the second one allowing entering IF clouse if true.
// Otherwise entering ELSE clause if exist.
Handlebars.registerHelper('ifEquals', function(a, b, options) {
  if (a === b) {
    return options.fn(this);
  }

  return options.inverse(this);
});

template.handlebars

{{#ifEquals mediaType 'video'}}
    {{!-- If our mediaType is equals to 'video', displaying video player. --}}
    <video></video>
{{/ifEquals}}


{{#ifEquals userFullname 'Nik Sumeiko'}}
    <p>Custom HTML for me.</p>

{{else}}
    <p>Global HTML for anyone else.</p>
{{/ifEquals}}