I'm running some test code for Vue.js and include Vue.js, Vuex and the javascript files via script tags (because it is for testing purposes only I don't want to use a build tool).
Most of the code runs correctly but the Vuex map functions (mapState, mapGetters ...) won't work. I always get ReferenceError: Can't find variable: mapState. Why can't I access the mapState? Aren't that global functions when included via script tag?
Just an example using code from the vue docs:
index.html
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />
<title></title>
</head>
<body>
<div id="app"></div>
<!-- Libraries ---------- -->
<script src="vendor/js/vue.js" type="text/javascript"></script>
<script src="vendor/js/vuex.js" type="text/javascript"></script>
<script src="app/js/store.js" type="text/javascript"></script>
<script src="app/js/app.js" type="text/javascript"></script>
</body>
</html>
store.js
const state = {
count: 0
}
const getters = {
evenOrOdd: state => state.count % 2 === 0 ? 'even' : 'odd'
}
const mutations = {
increment (state) {
state.count++
},
decrement (state) {
state.count--
}
}
const actions = {
increment: ({ mit }) => mit('increment'),
decrement: ({ mit }) => mit('decrement'),
incrementIfOdd: ({ mit, state }) => {
if ((state.count + 1) % 2 === 0) {
mit('increment')
}
},
incrementAsync: ({ mit }) => {
return new Promise((resolve, reject) => {
setTimeout(() => {
mit('increment')
resolve()
}, 1000)
})
}
}
const store = new Vuex.Store({
state,
getters,
mutations,
actions
})
app.js
const app = new Vue({
el: '#app',
template: `
<main>
<h1 class="title">Heading</h1>
</main>
`,
store,
puted: {
...mapState([count])
}
});
I'm running some test code for Vue.js and include Vue.js, Vuex and the javascript files via script tags (because it is for testing purposes only I don't want to use a build tool).
Most of the code runs correctly but the Vuex map functions (mapState, mapGetters ...) won't work. I always get ReferenceError: Can't find variable: mapState. Why can't I access the mapState? Aren't that global functions when included via script tag?
Just an example using code from the vue docs:
index.html
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />
<title></title>
</head>
<body>
<div id="app"></div>
<!-- Libraries ---------- -->
<script src="vendor/js/vue.js" type="text/javascript"></script>
<script src="vendor/js/vuex.js" type="text/javascript"></script>
<script src="app/js/store.js" type="text/javascript"></script>
<script src="app/js/app.js" type="text/javascript"></script>
</body>
</html>
store.js
const state = {
count: 0
}
const getters = {
evenOrOdd: state => state.count % 2 === 0 ? 'even' : 'odd'
}
const mutations = {
increment (state) {
state.count++
},
decrement (state) {
state.count--
}
}
const actions = {
increment: ({ mit }) => mit('increment'),
decrement: ({ mit }) => mit('decrement'),
incrementIfOdd: ({ mit, state }) => {
if ((state.count + 1) % 2 === 0) {
mit('increment')
}
},
incrementAsync: ({ mit }) => {
return new Promise((resolve, reject) => {
setTimeout(() => {
mit('increment')
resolve()
}, 1000)
})
}
}
const store = new Vuex.Store({
state,
getters,
mutations,
actions
})
app.js
const app = new Vue({
el: '#app',
template: `
<main>
<h1 class="title">Heading</h1>
</main>
`,
store,
puted: {
...mapState([count])
}
});
- Include unless your code. – Radonirina Maminiaina Commented Feb 12, 2018 at 13:31
-
If you are including Vuex as a script rather than building, you will need to access mapState via Vuex as
Vuex.mapState. – Bert Commented Feb 12, 2018 at 13:44 -
1
This got me one step further. Using
puted: Vuex.mapState({count: "count"})works butputed: { ...Vuex.mapState({count: "count"}) }gives me anSyntax Error: Unexpected token '...'. Expected a property name.error. What's the problem with using the spread operator here because I will need it to merge the states with my own puted properties. – Mountain Commented Feb 12, 2018 at 14:01 -
Object spread (
...mapState) is not widely available in browsers at this time. You'll have to do it the old fashioned way. – Bert Commented Feb 12, 2018 at 14:09 - You were right. The browser has support for array spreading but not for object spreading. Is there a simple 'old fashioned way'? I think the fact that all local puted properties are functions inside the puted object an not just key:value pairs will make it difficult. – Mountain Commented Feb 12, 2018 at 16:18
1 Answer
Reset to default 7In Many code examples I see
import { mapState } from 'vuex'
used to allow mapState to be referenced.
But as you say, you are including Vue and Vuex by referencing their scripts instead of using a build system
<script src="vendor/js/vue.js" type="text/javascript"></script>
<script src="vendor/js/vuex.js" type="text/javascript"></script>
And in this case, directly using "Vuex" as below works:
Vuex.mapState