关于vuejs2：Vue.js导出默认不起作用

Vue.js export default not working

我正在跟踪表单示例，但它不起作用::
https://bootstrap-vue.js.org/docs/components/form

这是我的代码，位于我简单的基本index.html中：

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<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">

<link type="text/css" rel="stylesheet" href="https://unpkg.com/bootstrap/dist/css/bootstrap.min.css"/>
<link type="text/css" rel="stylesheet" href="https://unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.css"/>

<script src="https://unpkg.com/vue">
<script src="https://unpkg.com/babel-polyfill@latest/dist/polyfill.min.js">
<script src="https://unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.js">

</head>

<body>
<template>

<b-form @submit="onSubmit" @reset="onReset" v-if="show">
<b-form-group id="exampleInputGroup1"
label="Email address:"
label-for="exampleInput1"
description="We'll never share your email with anyone else.">
<b-form-input id="exampleInput1"
type="email"
v-model="form.email"
required
placeholder="Enter email">
</b-form-input>
</b-form-group>
<b-form-group id="exampleInputGroup2"
label="Your Name:"
label-for="exampleInput2">
<b-form-input id="exampleInput2"
type="text"
v-model="form.name"
required
placeholder="Enter name">
</b-form-input>
</b-form-group>
<b-form-group id="exampleInputGroup3"
label="Food:"
label-for="exampleInput3">
<b-form-select id="exampleInput3"
:options="foods"
required
v-model="form.food">
</b-form-select>
</b-form-group>
<b-form-group id="exampleGroup4">
<b-form-checkbox-group v-model="form.checked" id="exampleChecks">
<b-form-checkbox value="me">Check me out</b-form-checkbox>
<b-form-checkbox value="that">Check that out</b-form-checkbox>
</b-form-checkbox-group>
</b-form-group>
<b-button type="submit" variant="primary">Submit</b-button>
<b-button type="reset" variant="danger">Reset</b-button>
</b-form>

</template>
</body>

和js代码1

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export default {
data () {
return {
form: {
email: '',
name: '',
food: null,
checked: []
},
foods: [
{ text: 'Select One', value: null },
'Carrots', 'Beans', 'Tomatoes', 'Corn'
],
show: true
}
},
methods: {
onSubmit (evt) {
evt.preventDefault();
alert(JSON.stringify(this.form));
},
onReset (evt) {
evt.preventDefault();
/* Reset our form values */
this.form.email = '';
this.form.name = '';
this.form.food = null;
this.form.checked = [];
/* Trick to reset/clear native browser form validation state */
this.show = false;
this.$nextTick(() => { this.show = true });
}
}
}

它与vue bootstrap网站上的内容完全相同，并且不起作用

有一个空白屏幕，这是Firefox错误：

SyntaxError：导出声明??只能出现在模块的顶层

我无法显示我的表格，什么也没有，只有一个空白屏幕，它不起作用！

注意：我不想使用babel或任何复杂的东西，我只需要我的index.html即可工作

请帮助我谢谢您

相关讨论

您在简单的HTML文件中将单文件组件与Vue混淆了。

要获得后者，您可以如下所示。

基本上，您必须：

删除<template>标记，并在其内部div中添加一个id，例如：
包装在Vue构造函数中导出的对象，并为其添加el选项：

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new Vue({
el: '#app',
data() {

JSBin演示在这里。

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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">

<link type="text/css" rel="stylesheet" href="https://unpkg.com/bootstrap/dist/css/bootstrap.min.css"/>
<link type="text/css" rel="stylesheet" href="https://unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.css"/>

<script src="https://unpkg.com/vue">
<script src="https://unpkg.com/babel-polyfill@latest/dist/polyfill.min.js">
<script src="https://unpkg.com/bootstrap-vue@latest/dist/bootstrap-vue.js">
</head>

<body>

<b-form @submit="onSubmit" @reset="onReset" v-if="show">
<b-form-group id="exampleInputGroup1"
label="Email address:"
label-for="exampleInput1"
description="We'll never share your email with anyone else.">
<b-form-input id="exampleInput1"
type="email"
v-model="form.email"
required
placeholder="Enter email">
</b-form-input>
</b-form-group>
<b-form-group id="exampleInputGroup2"
label="Your Name:"
label-for="exampleInput2">
<b-form-input id="exampleInput2"
type="text"
v-model="form.name"
required
placeholder="Enter name">
</b-form-input>
</b-form-group>
<b-form-group id="exampleInputGroup3"
label="Food:"
label-for="exampleInput3">
<b-form-select id="exampleInput3"
:options="foods"
required
v-model="form.food">
</b-form-select>
</b-form-group>
<b-form-group id="exampleGroup4">
<b-form-checkbox-group v-model="form.checked" id="exampleChecks">
<b-form-checkbox value="me">Check me out</b-form-checkbox>
<b-form-checkbox value="that">Check that out</b-form-checkbox>
</b-form-checkbox-group>
</b-form-group>
<b-button type="submit" variant="primary">Submit</b-button>
<b-button type="reset" variant="danger">Reset</b-button>
</b-form>

new Vue({
el: '#app',
data() {
return {
form: {
email: '',
name: '',
food: null,
checked: []
},
foods: [
{text: 'Select One', value: null},
'Carrots', 'Beans', 'Tomatoes', 'Corn'
],
show: true
}
},
methods: {
onSubmit(evt) {
evt.preventDefault();
alert(JSON.stringify(this.form));
},
onReset(evt) {
evt.preventDefault();
/* Reset our form values */
this.form.email = '';
this.form.name = '';
this.form.food = null;
this.form.checked = [];
/* Trick to reset/clear native browser form validation state */
this.show = false;
this.$nextTick(() => {
this.show = true
});
}
}
});

</body>
</html>

上面的代码直接在Vue实例中使用您的代码。

如果要将表单用作组件，例如：

1	<my-form></my-form>

关注此JSBin演示。