Question

我希望根据条件显示不同的HTML。

似乎没有比较这两个值，它总是显示第一个变体。如何将预定义值与JSON中的原始值进行比较，以便它可以正确执行？

{{#each this}}
  {{#each visits}}
    <div class="row">
      {{#if variable_from_json }}
        <div class="col-lg-2 col-md-2 col-sm-2">
          <i class="fa fa-home"></i>
         </div>
      {{else}}
        <div class="col-lg-2 col-md-2 col-sm-2">
          <i class="fa fa-plus symbol-hospital"></i>
        </div>
      {{/if}}
    </div>
  {{/each}}
{{/each}}

JS代码

Handlebars.registerHelper('if', function (variable_from_json, options) {
    if (variable_from_json === "M") {
        return options.fn(this);
    } else {
        return options.inverse(this);
    }
});

Answer 1

比较==，＆gt; =，||等值，＆安培;＆安培; 创建一个将处理所有案例的助手

Handlebars.registerHelper( "when",function(operand_1, operator, operand_2, options) {
  var operators = {
   'eq': function(l,r) { return l == r; },
   'noteq': function(l,r) { return l != r; },
   'gt': function(l,r) { return Number(l) > Number(r); },
   'or': function(l,r) { return l || r; },
   'and': function(l,r) { return l && r; },
   '%': function(l,r) { return (l % r) === 0; }
  }
  , result = operators[operator](operand_1,operand_2);

  if (result) return options.fn(this);
  else  return options.inverse(this);
});

在手柄文件中使用此运算符例如。 ==运算符

 {{#when <operand1> 'eq' <operand2>}}
   // do something here
 {{/when}}

Answer 2

这是Sunil More的答案，只是添加了<，> =和<=。

  + Apache 2.4.41
  + MariaDB 10.4.11
  + PHP 7.4.2 (VC15 X86 64bit thread safe) + PEAR
  + phpMyAdmin 5.0.1
  + OpenSSL 1.1.0g
  + ADOdb 518a
  + Mercury Mail Transport System v4.63 (not included in the portable version)
  + FileZilla FTP Server 0.9.41 (not included in the portable version)
  + Webalizer 2.23-04 (not included in the portable version)
  + Strawberry Perl 5.16.3.1 Portable
  + Tomcat 7.0.99
  + XAMPP Control Panel Version 3.2.4.
  + XAMPP mailToDisk 1.0 (write emails via PHP on local disk in <xampp>\mailoutput. Activated in the php.ini as mail default.)

如何比较车把的价值？

2 个答案: