Javascript 如何在handlebar.js块中使用和设置自定义变量?
假设我有这个jsonJavascript 如何在handlebar.js块中使用和设置自定义变量?,javascript,jquery,handlebars.js,Javascript,Jquery,Handlebars.js,假设我有这个json food = [ { name: "banana", type: "fruit", color: "yellow" }, { name: "apple", type: "fruit", color: red" }, { name: "strawberry", ty
food = [
{
name: "banana",
type: "fruit",
color: "yellow"
},
{
name: "apple",
type: "fruit",
color: red"
},
{
name: "strawberry",
type: "fruit",
color: "red"
},
{
name: "carrot",
type: "vegetable",
color: "orange"
},
{
name: "chocolate",
type: "dessert",
color: "brown"
}
]
我想在这样的表格中显示它:
<table>
<thead>
<tr>
<th>Name</th>
<th>Color</th>
</tr>
</thead>
<tbody>
{{#each food}
{{#if lastType == "" or lastType != type}}
<tr>
<td colspan="2">{{type}}
</tr>
{{/if}}
<tr>
<td>{{name}}</td>
<td>{{Color}}</td>
</tr>
{{/each}}
</tbody>
</table>
<table>
<thead>
<tr>
<th>Name</th>
<th>Color</th>
</tr>
</thead>
<tbody>
<tr>
<td colspan="2">fruit</td>
</tr>
<tr>
<td>banana</td>
<td>yellow</td>
</tr>
<tr>
<td>apple</td>
<td>red</td>
</tr>
<tr>
<td>strawberry</td>
<td>red</td>
</tr>
<tr>
<td colspan="2">vegetable</td>
</tr>
<tr>
<td>banana</td>
<td>yellow</td>
</tr>
<tr>
<td colspan="2">dessert</td>
</tr>
<tr>
<td>chocolate</td>
<td>brown</td>
</tr>
</tbody>
</table>
名称
颜色
{{{每种食物}
{{#如果lastType==“”或lastType!=type}
{{type}}
{{/if}
{{name}}
{{Color}}
{{/每个}}
但是我想为类型的属性每次添加一个新值时都添加另一个表行
<table>
<thead>
<tr>
<th>Name</th>
<th>Color</th>
</tr>
</thead>
<tbody>
{{#each food}
{{#if lastType == "" or lastType != type}}
<tr>
<td colspan="2">{{type}}
</tr>
{{/if}}
<tr>
<td>{{name}}</td>
<td>{{Color}}</td>
</tr>
{{/each}}
</tbody>
</table>
<table>
<thead>
<tr>
<th>Name</th>
<th>Color</th>
</tr>
</thead>
<tbody>
<tr>
<td colspan="2">fruit</td>
</tr>
<tr>
<td>banana</td>
<td>yellow</td>
</tr>
<tr>
<td>apple</td>
<td>red</td>
</tr>
<tr>
<td>strawberry</td>
<td>red</td>
</tr>
<tr>
<td colspan="2">vegetable</td>
</tr>
<tr>
<td>banana</td>
<td>yellow</td>
</tr>
<tr>
<td colspan="2">dessert</td>
</tr>
<tr>
<td>chocolate</td>
<td>brown</td>
</tr>
</tbody>
</table>
名称
颜色
水果
香蕉
黄色的
苹果
红色
草莓
红色
蔬菜
香蕉
黄色的
甜点
巧克力
棕色的
我怎样才能做到这一点呢?你的目标是将你的食物分组显示,并将其类型作为分组标题。我建议不要将进行分组的逻辑放在模板中,因为这样做会很麻烦。更好的解决方案——保持模板干净和清晰的方法——是在将数据发送到模板之前对其进行分组 理想的数据结构是按食品类型对食品进行索引。我们可以通过以下对象实现这一点:
{
"fruit": [
{
"color": "yellow",
"name": "banana",
"type": "fruit"
},
{
"color": "red",
"name": "apple",
"type": "fruit"
}
],
"vegetable": [
{
"color": "orange",
"name": "carrot",
"type": "vegetable"
}
],
"dessert": [
{
"color": "brown"
"name": "chocolate",
"type": "dessert"
}
]
}
使用此数据结构,使用嵌套的{{{{each}}
块在模板中获取分组将非常简单。(我假设我们已将对象命名为“foodsByType”)
我已经创建了一个供您参考的方法。是的,这比我尝试的方法要简单得多。非常有魅力。谢谢!