This time I will show you how vue calls methods externally. What are the precautions for vue to call methods externally. Here is a practical case, let’s take a look.
1. First define a public vue component;
var eventHub = new Vue();
2. In the event of the current component, in created, use $on to pass to the public component eventHub, translate is customized, and getCardNum(data) is the method to be called externally;
eventHub.$on('translate', function (data) { that.getCardNum(data); });
3. Finally, in the parent component, note that the negative component should be saved in a variable, var vm = new Vue({});
4. Define a method in the methods method in the parent component, and use $emit in the method to receive the method in the public component;
var vm = new Vue({ el: '#example', data: { msg: 'Hello Directive', data: {} }, methods: { getCardNum: function (data, on) { eventHub.$emit('translate', data); } } });
5. Finally, you can call the getCardNum(data) function outside the vue component or outside the file. For example, in HTML, you can call it like onclick = vm.getCardNum(); vm is the parent component
6. Be sure to write the variable name of the parent component as vm.getCardNum();
When I was developing with vue, I encountered a pop-up page in the java background that wanted to call a method in my vue component. However, the pop-up page in the background was not in my vue component, and other pages wanted to call it in vue. The method can only be called in the parent component, so I studied it for a long time and finally decided to pass the function() method in the component to the top-level parent component, save the negative component in a variable, and finally directly add it to other pages When calling the method, you cannot use the @click method to call it, because the background page is not inside my vue component, so the call is onclick = vm.getCardNum(); When called like this, vm is the parent component
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!
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