Unconventional behavior in Vue.js involving the window object

Question

Unconventional behavior in Vue.js involving the window object

Upon initializing my vue.js 2.0 application, I create a window.User object.

Everything seems to be functioning correctly. However, I encounter an issue when trying to use it in some components within my templates:

v-if="this.User.role == 2"

In some components, this works perfectly fine while in others it throws an error (

Cannot read property 'role' of undefined

). How is this even possible? To troubleshoot, I attempted the following in the problematic components:

created() {
    alert(window.User.role);
}

Surprisingly, the expected result appears! But for some reason, it doesn't work within the template. What could be causing this discrepancy? It's quite frustrating.

In my bootstrap.js:

window.User = Laravel.user;

I register all my components in a similar manner:

Vue.component('corporations',           require('./components/corporation/Corporations.vue'));

javascript vue.js

Answer 1

Answer №1

If you have a variable named User that behaves like a global variable and you need to access it in all components while ensuring reactivity, one approach is to add it to the root Vue's data and then reference it as this.$root.User in other components.

Another option is to use a mixin to define a computed property that will make the User variable available to all components utilizing the mixin. Here's an example:

var mixin = {
    computed: {
        User: function () { return window.User; }
    }
}

Using the mixin is probably the preferred method in this case.

Answer 2

If you have a variable named User that behaves like a global variable and you need to access it in all components while ensuring reactivity, one approach is to add it to the root Vue's data and then reference it as this.$root.User in other components.

Another option is to use a mixin to define a computed property that will make the User variable available to all components utilizing the mixin. Here's an example:

var mixin = {
    computed: {
        User: function () { return window.User; }
    }
}

Using the mixin is probably the preferred method in this case.

Unconventional behavior in Vue.js involving the window object

Answer №1

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