vue.js mix-in defines a part of reusable methods or calculated properties. The mix-in object can contain any component options. When a component uses the mix-in object, all the options of the mix-in object will be mixed into the component itself. options.
The operating environment of this tutorial: windows10 system, vue2.4.2, this article is applicable to all brands of computers.
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Mixins (mixins) defines a part of reusable methods or calculations Attributes. Mixins can contain arbitrary component options. When a component uses a mixin object, all options of the mixin object will be mixed into the options of the component itself.
Let’s look at a simple example:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Vue 测试实例</title>
<script src="https://cdn.staticfile.org/vue/2.4.2/vue.min.js"></script>
</head>
<body>
<div id = "databinding"></div>
<script type = "text/javascript">
var vm = new Vue({
el: '#databinding',
data: {
},
methods : {
},
});
// 定义一个混入对象
var myMixin = {
created: function () {
this.startmixin()
},
methods: {
startmixin: function () {
document.write("欢迎来到混入实例");
}
}
};
var Component = Vue.extend({
mixins: [myMixin]
})
var component = new Component();
</script>
</body>
</html>Option merging:
When components and mixin objects contain options with the same name, these options will be merged with the appropriate way to mix.
For example, data objects will be recursively merged internally, and when there is a conflict with component data, component data will take precedence.
Note:
(1) You set a data attribute in the mixed object, which contains various attribute values. There is also a data attribute in the component, so the data of the mixed object and the component object Values will be merged, and components with the same name have limited data;
(2) Hook functions with the same name will be called, and the hooks of mixed objects are called before the component's own hooks;
Global mixin
The format is:
Vue.mixin({ // 混入函数 })Attention! Use with caution. Once you use a global mixin object, it will affect all Vue instances created later. When used appropriately, custom objects can be infused with processing logic.
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