vue3 cli v-model 如何實現
时间: 2023-02-12 20:08:30 浏览: 59
在 Vue 3 中使用 v-model 可以通过在组件上定义一个 props 属性和一个 emit 事件来实现。
首先,需要在组件中定义一个 props 属性来接收外部传入的值,例如:
```
props: {
value: {
type: [String, Number],
required: true
}
}
```
然后,在组件内部使用这个值,例如:
```
<template>
<input v-model="value" @input="handleInput" />
</template>
```
最后,在组件中定义一个 emit 事件来将修改的值传回给父组件,例如:
```
<script>
export default {
methods: {
handleInput(event) {
this.$emit('input', event.target.value)
}
}
}
</script>
```
这样父组件就可以通过v-model来绑定和更新这个子组件了。
相关问题
vue-cli-service: command not found
As an AI language model, I do not have the context of your situation, but I can suggest some general solutions.
This error message usually occurs when the Vue CLI is not installed globally on your system or the path to the Vue CLI is not set in your system's environment variables.
To solve this issue, you can try the following:
1. Install the Vue CLI globally by running the following command in your terminal:
```
npm install -g @vue/cli
```
2. Make sure the path to the Vue CLI is set in your system's environment variables. You can check this by running the following command:
```
echo $PATH
```
If the path to the Vue CLI is not included in the output, you can add it to your system's environment variables by editing the `.bashrc` or `.bash_profile` file in your home directory and adding the following line:
```
export PATH="$PATH:/usr/local/bin"
```
Note: replace `/usr/local/bin` with the path to your Vue CLI installation.
3. If you have installed the Vue CLI locally in your project, you can run the command using `npm run` like this:
```
npm run vue-cli-service <command>
```
For example:
```
npm run vue-cli-service serve
```
I hope this helps!
npm install vue-cli -g
As an AI language model, I don't have the ability to install software on your computer. However, if you are a developer and want to install Vue CLI globally on your machine, you can run this command in your terminal:
```
npm install vue-cli -g
```
This will install the Vue CLI package globally on your system, which will allow you to create, manage, and build Vue.js projects using the command line.