HandlebarsJS：显示JSON数组中对象数量的总和？

Question

我有以下简单的handlebarsjs 电子邮件 HTML 模板：

<script id="emailTemplate" type="text/x-handlebars-template">
    <div>
       Hi {{name }} , you have submitted {{ SUM_OF_ARRAY_OBJECTS}} cars. Thanks.
    </div>
</script>

带有json 内容：

{
  "name": "john",
  "cars": [
    {
      "registration": "stubReg1",
      "year": "1995"
    },
    {
      "registration": "stubReg2",
      "year": "2000"
    },
    {
      "registration": "stubReg3",
      "year": "2010"
    },
    {
      "registration": "stubReg4",
      "year": "2016"
    }
  ]
}

如何使用把手在SUM_OF_ARRAY_OBJECTS 占位符中显示数组对象的总数？即本例中的 4。

Answer 1

我找到了一个比我想象的更简单的答案：

{{cars.length}} 将显示数组中对象数量的总和。