Vue setup this is undefined. You signed in with another tab or window.

Vue setup this is undefined Photo by Igor Peftiev on Unsplash. Ask Question Asked 8 years, 4 months ago. npm install nuxt@latest vue-router@latest vue@latest --save-dev This will probably cause index. However when I look in Vue dev-tools at the TeamInfo component I can see that both props are undefined but the params are populated. js. ReferenceError: process is not defined vue 3. Full warning: 500: Cannot set properties of undefined (setting 'exists') Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The issue here is probably that you register vue-18n with the Vue object from index. This might cause The log in the mounted method returns undefined. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company you don't need to validate if article. I could access mutations, actions and getters without any issue. Vue: v-model undefined or default/fallback. #2197. You don't have this data on the instance. It provides data-reactive components with a simple and flexible API. watch(() => Getting Proxy when you do console. In order to detect changes to the data Vue wraps the data with Proxy. I Vue props undefined. How do I get access to my properties with vue3, onMounted function? I'm using the setup script tag: &lt;script lang=&quot;ts&quot; setup&gt; import { ref, onMounted, computed, defineEmits,. vue component (see component hierarcy). Commented Dec 13, 2022 at 12:31 | Show 1 more comment. log in Vue 3 is absolutely normal. Explore Teams mounted is an option in the options api which is different than the composition api using the setup hook, you could use onMounted hook in setup to replace mounted option:. In console I'm getting TypeError: Cannot destructure property 'item' of 'undefined' as it is undefined. The way it's written currently, the this in width:this. I have modified your CodePen. Here's the code: With this setup, when you type something to the input field, this object should be written to the console: { `important-event`: function () { // some native vue. data[0] == undefined because javascript if/else will evaluate it as false if the condition is undefined, null, 0, ''. My scenario is a vue/meteor project. Closed parker-codes opened this issue Jun 25, 2019 · 20 comments I am fairly new to Vue and am using Vite and TypeScript to make my project. Vue. log(c)// don't use this keyword }) } Your beforeRouteEnter guard should be working so I assume your question is about onSubmit accessing the this. By attributing this from the parent scope to a variable, you can access it in inner scopes. js props undefined. In my case, I was using modules. value when accessing them. id the products array is for some reason when i fetch the products and filter them by the brand. Why it is undefined while firing default(), even in onMounted()? So why is default() working alone, and { item } is working alone, but not both combined? For me it's bug, but maybe I'm wrong and someone will clarify this. text === "foo" ? "bar" : setup() itself does not have access to the component instance - this will have a value of undefined inside setup(). Provide details and share your research! But avoid . That's the problem frameworks are intended to solve. vue > header-nav-menu. Its execution is earlier than other life cycle function. This issue typically arises when attempting to access this within functions that do I believe that refs (and other context) should be usable at the first level of setup(), whereas currently they are 'undefined'. Any help will be appreciated. 11. app, but you could add it yourself when setting up the router: import { createApp } from 'vue' import App from '. Because, in setup methods, you can not use this keywords. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The problem seems to be that this,Vue and window are all undefined. I always thought created runs before the dom gets loaded. min. js and import it in App. In this case, you should use No, you can pass in any filename as long as it exists. log an object, the browser automatically updates the logged value to show the latest. Cookie Settings; Cookie Policy; Stack Exchange Network. This makes thos Vue 3 composition api - computed property is returning undefined Hot Network Questions For a nation of super-intelligent children, why would childish doodles be the most efficient visual communication for them? so here is my vue sfc that is supposed to display a list of products that are sold by a given brand ID, for some reason when i fetch the products and filter them by the brand. updateAutocomplete will be undefined. ts import mitt from 'mitt' export const emitter = mitt() export const useBus = => ({ bus: emitter }) You signed in with another tab or window. So I have to treat this warning You signed in with another tab or window. However, the HTML can't be rendered when it's deployed to Netlify with npm run build command. I have a view where I'd like to take the router url and use it to call a method to access an API. Vue: declared props in component are undefined. Just adding on the "Why" part, the docs states that; " When setup is executed, the component instance has not been created yet. js for hot reloading. Been trying to figure this out for a while. params. Vue component prop undefined. vue component can provide data to the container-nav. js which after jQuery, is the second JS framework I'm learning since I came to this planet. state) } } ` however, after npm run build, in production environment, "this. The order is roughly: Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I'm using [email protected] and the vue official webpack template to build an app. The last step is to setup your computed properties, so that whenever font1, font2, or font3 changes, they will update the internal font data store appropriately: I am quite new to Vue. 2 Why Is "this" Undefined in Vue 3 Function. Improve this question. On mounted, the v-dialog isnt actually mounted or lets say its not initialized. You signed out in another tab or window. because in script setup, the component is rendered before early DOM, so this keyword will undefine when DOM rendering I want to define a variable to be used in the component, which should not be reactive. js, the value of this can sometimes be undefined within certain methods or callbacks. spyOn, by default, pinia mocks all methods. 1. &lt;a hr According to the composition API documentation you have to use the following syntax:. Module is ofc installed I have a simple Vue component with root element as ref=&quot;divRef&quot;. In order to get the expected behavior, you should Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. 2. VueJS - Invalid handler for event "click": got undefined. js is an easy to use web app framework that we can use to develop interactive front end apps. It seems as the vue app is loading it is quite possible that since the v-if is there the condition is not fulfilled until other asynchronous processes have fully loaded which more than likely has past the mounted lifecycle. When calling my method with 'route. Viewed 471 times 0 My app. js file: import Vue from 'vue' import VueRouter from 'vue-router' Then, export an instantiation of the router: Vue. Whenever I go to build I get a page of errors, mostly consisting of Object is possibly 'undefined' in parts of my templat And you can use codes in your Vue component. Try this eager prop of the v-dialog like this below : spaces is undefined until your store returns the data, so you can't read its length at that point. js src/boot/cr When using the Vue 3 composition API, this is undefined within the setup() method. Improve this answer. Reload to refresh your session. mount('#app') I tested with a newly generated vue-cli app and it does not work. js from Laravel Project Here you can see I instigate the Vue instance (resources\\assets\\js\\app. It seems like this Don't worry, you're not alone — I've run into this issue countless times, and I'll show you just how to solve it. You just need to tweak the template such that it can cope with undefined data while it's waiting for the store; v-if="spaces && ok so I have found a method to resolve this. I've also tried the solution here `this` undefined in vue-router beforeEach. When I do console. When using <script setup>, any top-level bindings There are two problems: You can use getCurrentInstance only in setup or lifecycle hooks of a Vue component; Properties added to app. My issue was that there were duplicate vue-routers. The issue comes up when i export the "App. In order to solve this we can use a native feature of vue2-dropzone which is vdropzone-mounted so I'm following the Laracasts Tutorials on Vue. vue --> <script lang="ts"> import { watch } from 'vue'; import { useRoute } from 'vue-router'; export default { setup Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I checked the Vue Devtools, only image no props success, other data does have correct props, the image prop is still undefined, the image data is url and when I console. You have to set props: true in your route definition for route params to be assigned to props:. 1. import {onMounted} from 'vue'; setup(){ let c='some content' onMounted(()=>{ console. import { defineComponent, I'm trying to figure out why my Vue instance's refs are undefined. Props being parsed undefined? 0. vue instance is undefined after vite build . I realize this answer is not for the current question, but it is a top result for "template ref null vue 3 composition api" so I suspect more like me will come here and will I am trying to redirect and pass data from one component to another using vue-router. I found the solution here: Uncaught TypeError: Cannot read properties of undefined (reading 'extend') I don't understand why I can't do openAndFillModalSoin(soin) { this. log(this. router. js?TypeError: Cannot read properties of undefined Cookie Settings; Cookie Policy; Stack Exchange @MohammadFahadRao this is a reserved variable that depends on the scope it's accessed on. And I have no idea why. vue. The problem: I have a vue app with typescript. You need to ensure the data property is there first, and then check its length. All the examples that I can find use this coding pattern, but the this variable is undefined in the script setup coding pattern as far as I can tell. Ask Question Asked 5 years, 11 months ago. In their documentation, they say: If you choose to use Vuex and TypeScript when you create a project folder with Quasar CLI, it will add some typing code in src/store/index. It doesn't look like I'm using the wrong type of function (arrow versus normal function). Thats the only diffrence between using the app(s) as standalone, or wrapped inside a "main" app that use them as components. When the watchEvent runs, I get the error Cannot read property "$emit" of undefined. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company The <script setup> is a syntactic sugar that wraps everything you write in a setup() function, which and returns all the free variables/functions you write. Try importing the vue router from inside your outerroutes. eslintrc example don't cover the whole setup API, so it misses important build-time variables, and that answer also breaks linting in regular <script> tag, where the build-time variable will be actually undefined and never imported. date, this. I am trying to use the Options API for the Provide & Inject capabilities of Vue, so that the header. Explore Teams Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I'm trying to replicate this, only with <script setup> tag which doesn't have this keyword. In below Demo, article object is missing from the 4th object and for undefined/null values, It is You signed in with another tab or window. Top-level bindings are exposed to template . Explore Teams Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company import { useRoute } from 'vue-router' // setup() { const route = useRoute(); // } You might want to have a look at examples presented here for a detailed approach on how to test various router related scenarios with a vue3 composition api setup. The issue is this. state. My console log shows all that is working. dataset, you're trying to get the dataset property of the vue instance's data. 11 in a Laravel 5 project. Means that the package is too old and causes incorrect behaviour. 16 and bootstrap-vue 2. calcWidth will not be referring to the correct object. count), // access a getter in computed function double: Note: as of 3. updateAutocomplete(newValue)). Inside the project we have several files that create global variables inside a boot directory: src/boot/auth. This ensures that this refers to the Vue instance. I have a problem with the following function in my main component: &lt;script&gt; export default { ready: function listenKey Now I'm getting frustrated :( This is my very first attempt at using vue. The two options I see would be to either keep the Are there any linter tool for Vue to trace down the actual code which I get it after build. I've a feeling this is problem related with webpack. js file: createApp(App) . You could directly do this in your test : const usersStore = useUsersStore(); I tried to repoduce your setup which resulted in a Uncaught ReferenceError: Cannot access 'App' before initialization in the browser console (I have a project based on vite 2 and vue 3). 0 rc. I never found the solution through web searching, so I'm going to post it here anyways. The next problem is that computed properties are not available within the data function. I've been saying this for a while: all those different ways to write Vue are ways to shoot yourself in Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Vue 3, get props in setup. Ask Question Asked 1 year, 10 months ago. 0. As a follow-up to liximomo/vue-function-api#10 (comment), the refs are now injected, but they can only be accessed inside of a lifecycle method. value as null then make sure the element you're trying to get the ref to isn't hidden under a false v-if. This issue relates when using Vuex and Typescript in Quasar(v2). program = program // TS2532: Object is possibly 'undefined'. Hot Network Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I use vitest, pinia and testing-library (based on vue-test-utils). 13+, this package is included as a dependency of the main vue package and can be accessed as vue/compiler-sfc. Remember that you are Always, always make sure data's available before accessing it in the template. First option, manually tell it what there is - let goToEvent = (this:Event, event, upcoming=false) => Why does Vue 3's `setup(props) { props. Technology Culture & recreation Life & arts Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Ask questions, find answers and collaborate at work with Stack Overflow for Teams. /App. 14. " Meaning everything in the data object property is applied directly to the new Vue. Getting undefined in props. The code inside is compiled as the content of the component's setup() function. 1 and another one of my I have installed the vue-cookies in my project. Calling a function with a paramater in click causes A few tips for people who land here: Make sure your . Modified 8 years, i forgot to name the component when setting it in my Vue Why is my getter doubleCount always undefined (when inspecting from setup(), or trying to use in template? store. Modified 1 year, 10 months ago. app); //still undefined! Vue Router 4 removes router. Vue will not instantiate the ref until the element is actually required. It needs to be within a function to get the scoping correct. checkedNumbers. However, in onMounted function, divRef. js and i've hit a bit of a roadblock, i have a vueify component called app-footer. use(Vuelidate) I'm trying to grab the :id param from the URL and if it matches an ID in a JSON it updates a ref data point called 'exists'. I understand the issue well and agree that map is not defined as setup runs before mounted. 4. the global variables defined in that . . Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; After adding to the project package timecode by npm install timecode --save and try to use it in Vue component, imported module is undefined. Please, tell me, what mistake I am doing! Thanks! vue. IMHO, there is no need : to mock onMounted : you're goal is not to check that onMounted is called => this is Vue internal test. In most cases you should use a regular function with Vue, especially when creating: methods; computed props; watched props; While regular functions are usually what you need, arrow functions come in very Your solution works. You can access Composition-API-exposed values As a general rule, don't look inside of components, particularly don't try to look at them in the view to get useful things out. Vue is undefined. js; vuejs2; vue-component; Share. Vue 2: Unable to find method on click event from component. When developing locally, I often see the warning Uncaught TypeError: Cannot read property of undefined, but the HTML can be rendered successfully. id the products array is still undefined Hi @IhsanFajarRamadhan It seems that it is both wrong and outdated, I'm sorry to say. I use firestore for the project, did I do anything wrong here? You signed in with another tab or window. 0. Despite its removal from the docs, getCurrentInstance() still: is widely used in Vue core. is not documented as deprecated in code. reduce(function (a, b As I am still fairly new to writing questions, I apologise for possible misvoicing. Here is the final solution: <!-- MainLayout. Solution is when using modules state should access with the namespace of the module. js 1 to Vue. text = this. the following codes work well in dev environment ` <script setup> import {reactive} from "vue" let state = reactive({ a:'', b:'' }) </setup> export default { created() { console. vue?e90b:7:1). the question mark ? is optional chaining to evaluate if article is exist, if it does not exist the code will stop there refs returned from setup are automatically shallow unwrapped when accessed in the template so you do not need to use . extend so will need to update the script section. Template (from code that I'm trying to replicate) <swiper ref="swiper"> <swi The route is updated asynchronously, and you're logging it before the update actually occurs. js code} } Share Inside setup(), this won't be a reference to the current active instance Since setup() is called before other component options are resolved, this inside setup() will behave quite differently from this in other options. show = true, this. ) which enables you to read the value of a property located deep within a chain of connected objects without having to check that each reference in the chain is valid. This method returns a promise I can use to populate my page. import { defineStore } from 'pinia'; import { ref } from 'vue'; I found vstollen solution only partially worked for me, so had to make additional installs:. Vuejs Prop is undefined. But not the state. to use vi. Refs are undefined in setup() outside of lifecycle method #6. If you're seeing the wrapper. Also it's really weird this is always happening on this specific axios call and not on the others. [Vue warn]: Invalid prop: type check failed for prop "open". – Phiter There are several problems. Vue <script setup>, unable to use defineProps and defineEmits without importing it. Note that you should not use an arrow function to define a watcher (e. searchQuery: newValue => this. The project uses yarn v1 workspaces. id }` return undefined. vue that contains all of my styles scripts and template. Technology getCurrentInstance() was originally documented in 4-Oct-2020, but that was later removed in 31-Aug-2021 in a major refactoring of the Composition API docs by the creator of Vue (Evan You). log image. In your case, before accessing the plans array or plans' key (plans[0]), make a computed property or directly apply a condition at the template to check if it is available in the DOM, like The method setup() is called at the beginning of the lifespan of the component, just as renderer encounters it. In this case you can use Optional chaining (?. I'd suggest to extract the constant in an additional javascript file like example. What Reinink suggested didn't work for me in Vue 3 using composition API, instead, I did the following - import {router} from '@inertiajs/vue3' router. You signed in with another tab or window. js file like this. One is working great, the other is throwing up this error: One page loads a collection of wordpress posts (Blog. Closed 2 of 3 tasks. js and while developing my first project i have stumbled upon a problem which I think is related to the component's lifecycle. log on this. The context is the following: I am using Vue 3 with composition API. Ask questions, find answers and collaborate at work with Stack Overflow for Teams. thread. 5. vDate = soin. globalProperties are exposed directly on component instances; So my preferred solution would be: // bus. js if necessary). I have not use => anywhere except only in the lazy load router. The reason is arrow functions bind the parent context, so this will not be the Vue instance as you expect and this. Lodash's debounce implementation will preserve the value of this at the time when the debounced function was last called. exists is showing as undefined. vue), the other displays an individual post. vue > container-nav. 2. env files are in the project root folder (and not in say src/); Variable names should start with VUE_APP_ if to be statically embedded into the client bundle; Restart the dev First of all, install it using this command: npm install vuelidate --save I would recommend us to define it globally by importing it in your src/main. You may notice there's [@vue/compiler-sfc] <script setup> is still an experimental proposal message. Using View. vCategorie = soin. Maybe that because threadStore installed first than userStore?But how I can get users from userStore in threadStore?. They are also unwrapped in the same way when accessed on this. js is a library for building interactive web interfaces. To get a typed Vuex store in your component you will need to modify your Vue file like this: I am currently working on upgrading a project to Vue3. This means that unlike normal <script>, which only executes once when the component is first imported, code inside <script setup> will execute every time an instance of the component is created. You can use the logical AND operator, which will return false if ‘items. slug prop. 'process' var is undefined in Vue / Typescript component. log(images), the data is shown, but props are still undefined. use(store) . Vue 3: `defineProps` are referencing Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company While this code may solve the question, including an explanation of how and why this solves the problem would really help to improve the quality of your post, and probably result in more up-votes. config. state" comes out to be undefined I was typing this up as a help request, but halfway through, some rubber ducking kicked in and I figured out the issue. log(router. One of my packages depended on vue-router v4. setup() itself does not have access to the component instance - this will have a value of undefined inside setup(). What is the alternative? Thanks. If you want to change codes, you can defined a function in setup or methods, like this: From that we get "The data object for the Vue instance. I believe that when using the watch function, you need to have the context of the callback function be the Vue instance. As part of one vue-file I'm opening a modal like this: <button v-b-modal. When you console. vue' createApp(App). id the products array is still undefined <script setup> import Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company [Vue] In production, ref created in setup method is undefined in render method. common. Current Component Hierarchy: header. B Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Body of your setup is missing the return of ref values you wish to use in <template>. ts. js 2. runtime. I want to get users in threadStore from userStore, but users is undefined. js): import AutoPopulate You're tagged with Typescript, so you need to tell TS that this actually has a value (note, I do not know VueJS, am using the generic Event types here, there is likely a more valid and correct type!). vue Vue is undefined. js), but vue-loader uses what you defined in the webpack config: vue. These types of errors (cannot read property undefined of) mostly occur due to a lack of checking first. There are generally two ways to fix OP's issue: a) prepare the component for the case the prop being unavailable (your solution, more verbose) or b) tell the component explicitely it can rely on the prop being available (my solution). categoriesoin. In any case, you would be binding the function too early - there is no Vue component instance that this would even refer to at the time when debounce() is called. Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'init') at setup (HelloWorld. myVariable = new This rule applies when this object is used in the setup function of a Vue component. vue to complain about vue. I have included the following in the main. In this article, we’ll look at how to fix the ‘this is I'm working on vue 3. I'm new to both Vue and Pinia, so I must be doing something wrong here. The prop options you are passing to your CustomSelect. export default { methods: { setProgram: (program: Program)=>{ this. counter shows the correct value. js src/boot/axios. I'll explain how this scoping works in more detail later on. After building the app with "vite build" (npm run build) I'm getting "can't read property hasTokens() of undefined" The undefined being references here is "this" in the template (single file components), all references to hasTokens are v-if and v You signed in with another tab or window. js file In a single HTML file or do you have a complete directory as we setup the Vue project? – Neha Soni. – Estus Flask. import Vuelidate from 'vuelidate'; Vue. The likely cause of this is that you're mixing up your usage of regular functions and We can fix this by replacing the arrow function with a regular function as follows: el: "#app", data: { text: "foo" }, methods: { toggle() { this. This means you no longer need to explicitly install this package and ensure its version match that of vue's. Those are two different files, Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Edit: i also tried setting song to null in the store but it still doesnt work. id', it says that the parameter is I switched to typescript and suddenly some of my codes are having errors with: Object is possibly 'undefined' The typescript version is 3. post (url, data, options) Reference. modalSettings>Settings</button> The modal is defined and this works when I compile the file using "npm run dev" or "npm run watch". vue (and main. So perhaps this is a good place to explain how I fixed it. Not sure if it's relevant but I'm using vite / vue3. However, when the data is injected, it is undefined on initial load. In my main component I have a click link where I am calling a JavaScript function to do the routing. use(router, axios, VueCookies) Then the script part in the Ap Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I'm currently upgrading my application from Vue. html (vue. Just use As you said, In some cases whole article object will be missing. Therefore, if you have a method like checkStore that you want to access within the watch callback, you should use an arrow function to correctly capture the component's context. Modified 5 years, 11 months ago. I would like to be able to use the props in the component and also populate the URL with the team ID. You switched accounts on another tab or window. If you try to access this in a inner function, it will have a different value than the one in the outer function. Commented Oct 1, VUE problem: reactive variables declared in <script setup> are reported undefined in created() You signed in with another tab or window. Thanks for the ans @Daniel . this is bound to an undefined value in the setup function unlike the this object of other component options, In Vue. isActiveCalendar, the variable is undefined and in Vue plugin for Chrome is same thing. I looked at one of my projects and found a difference that may be the problem. I attempted the const self = this; trick, to no avail. vue is coming from allCategories computed which is a getAllCategories getter in the store. data’ is coercible to false, so the second part, the ‘length’ check, won’t execute at all. You're trying to get a property of the clicked element. You can access the element trough the event variable. esm. That means that all elements used in the body of the <template> must be known at the moment that setup() finishes. value returns undefined. Vue will recursively convert its properties into getter/setters to make it “reactive”. Expected Boolean, got Undefined at <Modal open=undefined onClose=fn > at <Dashboard> at <Developers errors Im using: Laravel 9, ViteJs, Vue3. beforeEach((to,from,next) => { console. Also in userStore threads from threadStore has a correct value. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Ask questions, find answers and collaborate at work with Stack Overflow for Teams. Why is "this" undefined in Vue Composition API setup function? 1 Can't access `this` in Vue 3 methods with regular OR arrow functions. //inside RecyclablesPopup <script setup> import { ref } from 'vue' const click = => { //do something } defineExpose({ click, }) </script> Share. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog I'm working with vue-router and Vue 3. So your code should be: Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. so here is my vue sfc that is supposed to display a list of products that are sold by a given brand ID, for some reason when i fetch the products and filter them by the brand. oliverfindl opened this issue Feb 23, 2021 · 2 comments In the production build you end up importing different You signed in with another tab or window. I hate two pages in a Vue application. TypeError: Cannot read properties of undefined in Vue. You can access Composition-API-exposed values from Options API, but not the Remove the arrow function and replace it by a simple function. Since we're defining it on the Vue component, this refers to your Vue component. g. That is easily fixed by changing data to a function. 0 In Vue 3 hook, in the return type object inside `this` is always `undefined` Have an app that's built in Vue. However, this is not true for strings, which is the reason the searchQuery string is undefined in the log, while the route object is up to date. It's caused only by using default() in code. I don't believe this is the desired usage. I'm using Vue 2. A way to do this would be to: setup() { return { myVariable: undefined, }; }, and use it later like: mounted() { this. Asking for help, clarification, or responding to other answers. The Chrome Vue devtools does not recognize any localhost app and typing Vue in the console inside a Vue app says this: Uncaught ReferenceError: Vue is not defined at <anonymous>:1:1 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company When you do this. name, @Estradiaz The function passed to debounce must not be bound in this case. const routes = [ { path: "/book-editor/:slug?", name: "book-editor", component: BookEditor, props: true // <-- Add this } ]; My template <script setup> import { computed, ref, watch } from "vue"; let checkedNumbers = ref([]); function sum(){ return this. undefined component in Vue. js" file, to initalize the app/routing stuff. use(VueRouter) export default new VueRouter({ mode: 'history', I know this is old, but I am gonna share something I ran into and how I got around it in case someone is struggling out there. import { computed } from 'vue' // If not already imported import { useStore } from 'vuex' export default { setup { const store = useStore() return { // access a state in computed function count: computed(() => store. vue" through the "main. gjsrgen qtmxb pcd pyeaca oeunh ipk itnpbj okszwzr ektve lbpjrrwyi