[英]vue:call a function with extra param
https://github.com/ElemeFE/element http://element.eleme.io/#/en-US/component/upload https://github.com/ElemeFE/element http://element.eleme.io/#/en-US/component/upload
<el-upload
class="avatar-uploader"
action="/upload"
:show-file-list="false"
:on-error="handleUrlError"
:on-success="handleUrlSuccess">
<i v-else class="el-icon-plus avatar-uploader-icon"></i>
</el-upload>
function:功能:
handleUrlSuccess(response, file, fileList) {
}
if add a extra param:如果添加额外的参数:
<el-upload
class="avatar-uploader"
action="/upload"
:show-file-list="false"
:on-error="handleUrlError"
:on-success="handleUrlSuccess(response, file, fileList, 233)">
<i v-else class="el-icon-plus avatar-uploader-icon"></i>
</el-upload>
function:功能:
handleUrlSuccess(response, file, fileList, param) {
}
Property or method "response" is not defined on the instance but referenced during render.属性或方法“响应”未在实例上定义,而是在渲染期间引用。
The arguments for your method are coming from the component's emitted on-success event.您的方法的参数来自组件发出的成功事件。 For example, it would have something like
例如,它会有类似的东西
this.$emit('on-success', response, file, fileList)
Internally, Vue would do something like (and this is very simplified)...在内部,Vue 会做类似的事情(这是非常简化的)...
let boundEventHandler = parseEventHandlerExpression(eventName)
boundEventFunction.apply(vmInstance, arguments)
What you can do in your consumer is capture all these arguments and then append your own您可以在消费者中做的是捕获所有这些参数,然后附加您自己的
:on-success="handleUrlSuccess(...arguments, 233)"
or或者
:on-success="(res, file, fileList) => handleUrlSuccess(res, file, fileList, 233)"
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