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我很新的handlebars.js,我试着写一个简单的if/else助手。Handlebars定制帮手错误:“options.fn不是一个函数”
我用this codepen为指导。
我已经发现你不应该在定制助手面前使用#
,但我无法弄清楚为什么我仍然得到这个错误。
这是我index.html
:
<html>
<head>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/4.0.5/handlebars.min.js">
</script>
<script type="text/javascript" src="
https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0-beta1/jquery.js"></script>
<script src="data.js"></script>
<script src="helper.js"></script>
</head>
<body>
<script id="entry-template" type="text/x-handlebars-template">
<ul class="test">
{{#each people}}
{{ifThird @index}}
<li>
{{firstName}}
</li>
{{else}}
<li>
{{firstName}}{{lastName}}
</li>
{{/each}}
</ul>
</div>
</div>
</script>
</body>
</html>
...这是:
$(function(){
var templateScript = $("#entry-template").html();
var theTemplate = Handlebars.compile(templateScript);
var context = {
people: [
{firstName: "Yehuda", lastName: "Katz"},
{firstName: "Carl", lastName: "Lerche"},
{firstName: "Alan", lastName: "Johnson"},
{firstName: "Nathan", lastName:"Klumpenaar"},
{firstName: "Aart", lastName:"Klumpenaar"},
{firstName: "jeroen", lastName: "van Dam"}
]
};
var html = theTemplate(context);
$('.test').html(html);
$(document.body).append(html);
})
...这是helper.js
(误差应该在这里):
Handlebars.registerHelper('ifThird', function (index, options) {
if(index%3 == 0){
return options.fn(this);
} else {
return options.inverse(this);
}
});
data.js执行渲染吗?如果是这样,请确保帮手已经在那里。 –