A detailed description of the Vue.observable function and how to use it to create reactive data-Vue.js-php.cn

A detailed description of the Vue.observable function and how to use it to create reactive data

王林

Release： 2023-07-24 20:18:16

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Detailed description of the Vue.observable function and how to use it to create responsive data

When developing web applications, in many cases we need to share data between different components. Vue.js provides a simple yet powerful way to solve this problem, by creating reactive data. The Vue.observable function is a new feature introduced after Vue.js 2.6, which allows us to easily create observable objects.

The function of Vue.observable function is to convert an ordinary Javascript object into an observable object. The characteristic of an observable object is that when its internal properties change, it notifies all places that rely on these properties to update. In this way, we don't need to manually manage data changes, but let Vue.js automatically do it for us.

Let’s take a look at how to use the Vue.observable function to create responsive data.

First, we need to install Vue.js and introduce it:

Then, we create a normal Javascript object:

const data = {
name: 'Alice',
age: 25,
email: 'alice@example.com'
};

Next, we use the Vue.observable function to convert this ordinary object into an observable object:

const observableData = Vue.observable(data);

Now, observableData is an observable object. We can use its properties directly, just like using ordinary objects:

console.log(observableData.name); // Output: Alice

It should be noted that only when we access Only when a property of an observable object changes will it be tracked by Vue.js. Modifications to the original object after we create the observable object will not be noticed by Vue.js.

We can also use this observable object in other components. Suppose we have a component A and a component B, both of which need to use this observable object:

Component A code:

Component B code: