javascript 是否可以在车把模板中嵌套 if/else 语句？
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Is it possible to nest if/else statements in handlebars templates?
提问by Henry Wilson
I'm wondering if it is possible to nest multiple if/else statements using handlebars? All my attempts so far have resulted in compile errors, what I'd like to do is as follows:
我想知道是否可以使用把手嵌套多个 if/else 语句？到目前为止，我所有的尝试都导致了编译错误，我想做的如下：
{{if address}}
<ul>
<li>address.line1</li>
<li>address.line2</li>
{{if address.line3}}<li>address.line3</li>{{/if}}
{{if address.line4}}<li>address.line4</li>{{/if}}
{{else}}
No address given
{{/if}}
Is what I'm attempting here achievable? It always results in parser errors, thusfar I've got around it by writing a helper to deal with spitting out the address (which deals with conditionality of line3/line4 in javascript):
我在这里尝试的东西可以实现吗？它总是导致解析器错误，到目前为止，我已经通过编写一个帮助程序来处理吐出地址（它处理 JavaScript 中 line3/line4 的条件）来解决它：
{{if address}}
{{formatAddress address}}
{{else}}
No address given
{{/if}}
While this works, it would be nice not to have to write a helper function for every instance of this sort of simple conditionality.
虽然这是有效的，但最好不必为这种简单条件的每个实例编写一个辅助函数。
回答by dcodesmith
I believe ifs need a preceding #
我相信 ifs 需要一个前面的 #
Try this.
试试这个。
{{#if address}}
<ul>
<li>address.line1</li>
<li>address.line2</li>
{{#if address.line3}}<li>address.line3</li>{{/if}}
{{#if address.line4}}<li>address.line4</li>{{/if}}
</ul>
{{else}}
No address given
{{/if}}
