是否可以将函数传递给组件并在传递参数的组件内部调用此函数?
例子:
帖子列表
<post-list posts="blog.posts"
loading="blog.loadingPosts"
get-post-url="blog.getPostUrl"
is-user-authenticate="blog.user">
</post-list>
getPostUrl 是一个函数(在容器 Controller 中):
const getPostUrl = (postId) => {
const protocol = $location.protocol();
const host = $location.host();
const port = $location.port();
return protocol + "://" + host + "" + (port !== 80 ? ":" + port : "") + "/blog/post/" + postId;
};
帖子列表:组件
const PostList = {
"bindings": {
"posts": "<",
"loading": "<",
"getPostUrl": "&", //Function getPostUrl
"isUserAuthenticate": "<"
},
"template": `<div>
<div class="col-md-9 text-center" data-ng-if="$ctrl.loading">
<i class="fa fa-spinner fa-spin fa-2x"></i>
</div>
<div class="col-md-9 posts" data-ng-if="!$ctrl.loading">
<div data-ng-repeat="post in $ctrl.posts">
<post creation-date="{{post.creationDate}}"
content="{{post.content}}"
post-url="{{$ctrl.getPostUrl(post.creationDate)}}"
is-user-authenticate="$ctrl.user">
</post>
</div>
</div>
</div>`,
"transclude": false
};
angular
.module("blog")
.component("postList", PostList);
在这一行中:
post-url="{{$ctrl.getPostUrl(post.creationDate)}}"
我想调用传递参数的函数,该函数返回一个字符串。
在 post 组件(不是 PostList)中,postUrl 是一个字符串属性 @
.
但是...不起作用!
angular.js:13550 Error: [$interpolate:interr] Can't interpolate: {{$ctrl.getPostUrl(post.creationDate)}} TypeError: Cannot use 'in' operator to search for 'blog' in 1459329888892 Error Link
有可能吗?又如何?
非常感谢!
最佳答案
您可以将函数传递给组件,但您必须将函数参数定义为对象,并将正确的参数名称作为其键。 示例:
<post-list posts="blog.posts"
loading="blog.loadingPosts"
get-post-url="blog.getPostUrl(postId)"
is-user-authenticate="blog.user">
</post-list>
const PostList = {
"bindings": {
"posts": "<",
"loading": "<",
"getPostUrl": "&", //Function getPostUrl
"isUserAuthenticate": "<"
},
"template": `<post creation-date="{{post.creationDate}}"
content="{{post.content}}"
post-url="{{$ctrl.getPostUrl({postId:post.creationDate})}}">
</post>
关于javascript - Angular 1.5 组件 : passing a function,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36884303/