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[jsRender] Template tag: {{if ...}} について最近知ったこと

Last updated at Posted at 2015-07-06

JavaScriptのテンプレートエンジンであるjsRenderを愛用してますが
if文について、最近知ったことをちょっと。

公式APIリファレンスには

sample
<h4>{{:title}}</h4>
{{if members && members.length}}
  <ul>
    {{for members}}
      <li>{{:name}}</li>
    {{/for}}
  </ul>
{{else standby && standby.length}}
  Standby only:
  <ul>
    {{for standby}}
      <li>{{:name}}</li>
    {{/for}}
  </ul>
{{else}}
  No members!
{{/if}}

のように、true/falseundefinedで評価するんだよふうに書かれているけど

なんのことはなく

sample2

{{if number === 1234}}
  <span>6億円!!</span>
{{else number === 1233}}
  <span>1億円!</span>
{{else number === 1235}}
  <span>1億円!</span>
{{else}}
  <span>はずれ</span>
{{/if}}

と書けるです。
(見逃してるだけだろうと思いますが…)

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