- V-for array of objects
- V-for object
- Vue list component
- V-for range
- V-for objects
- V-for number
- Elements in iteration expect to have v-bind:key directives
V-for array of objectsI have a v-for in a vue-bootstrap card that I need to populate with the properties of an array of objects I am getting through api. And I will have to display few more properties of the other nested objects. I dealt with nested objects when looping through arrays before using v-forand it worked fine, I could access the properties as I did in the template above. I thought the problem could be the lack of a unique id in the first layer of the object, so i created one and added to the objects of the array right before committing the action. The new objects now have this outer structure:. Also I am dealing with just one component the Cardnot with ul and nested lias most of the examples I found offering this solution. Can somebody help? Thanks x. What kind of data you want to output from all of this data? You can use the same idea and loop throw level2 and level4 for example. Its not so easy to solve dynamically You could add if or filter and so on. I need to populate a Card. I am not asking for a copy-paste answer, but at least an answer. No code, just plain English. Thanks for your time though, I appreciate. Hope I got it too, once for all. V-for with nested objects in array Get Help. Your object is 3 and even 4 levels deep. My bad.
Get the latest tutorials on SysAdmin and open source topics. Hub for Good Supporting each other to make an impact. Write for DigitalOcean You get paid, we donate to tech non-profits. While this tutorial has content that we believe is of great benefit to our community, we have not yet tested or edited it to ensure you have an error-free learning experience. It's on our list, and we're working on it! You can help us out by using the "report an issue" button at the bottom of the tutorial. Listing out items, from a simple to-do list to a complex card system is a common requirement for front-end applications. Starting off with the Vue. The built-in v-for directive allows us to loop through items in an array or object. We can loop over items in our messages array from the data model. This can be done by adding the v-for directive in the element that should be repeated. Similarly, we can loop over the objects in the shoppingItems array. Here we can access the values using a given key ex- item. In addition to the property value, we get two additional parameters when looping over objects with Vue. Namely, the key and the index values. The index provides us the index of the current item in the loop. This is simply the position of the item in the looped list 0, 1, 2. We can use a range in the v-for directive to iterate a specified number of times. When the array order is changed, by default Vue would change the data in each existing element rather than moving the DOM elements to the updated position. We can set Vue to track each element using a key. This would cause it to move elements rather than replacing values. Out of the box v-for supports array mutation methods.
V-for objectWe previously saw how we can loop through an array of items. The syntax for doing so is actually the same as with arrays. In this case, I will name the alias value. Then we use the in keyword as we did before, followed by the name of the data property containing the object — in this case person. We could also add a more complex expression such as a method invocation. The value alias will now contain the value of the object property for the current iteration of the loop, so now all we need to do is to output it with string interpolation. What we can also do, though, is to access the name of the property. To do this, we need to use the same syntax as in the previous post, where we accessed the loop index by adding parenthesis to the first part of the v-for directive. The first alias within the parenthesis is the value, so that part will remain the same. The second part is the object key, so I will name this propertyName. You might be wondering why the second alias is not the loop index as it was when using an array within the loop. The reason for this is that Vue. But what if we also want to access the loop index when iterating through object keys? Fortunately, Vue. Take an online course and become an Vue. Save my name, email, and website in this browser for the next time I comment. Notify me of follow-up comments by email. Previous Post. Next Post. Featured Learn Vue. Here is what you will learn: How to build advanced Vue. Thanks for the short and compact video! Leave a Reply Cancel reply Your e-mail address will not be published. Website optional.
Vue list componentThis is a quick example to show how to display a list of items in Vue with the v-for directive. The app component template contains some standard html for a heading and table, and inside the table the tr tag uses the v-for Vue directive to loop over the users array and render a table row for each user that includes the user name, email and role. The app component contains the hardcoded users array that is rendered with the v-for directive in template. The users array is declared as a data property of the Vue component so the template can see it. If you have an array of objects that don't have a unique property e. This is how the above v-for would look using the item index instead of the id as the key prop:. Share: Facebook Twitter. I'm a web developer in Sydney Australia and the technical lead at Point Blank DevelopmentI've been building websites and web applications in Sydney since Find me on:. Published: September 11 Other versions available: React: React Angular: Angular This is a quick example to show how to display a list of items in Vue with the v-for directive. About I'm a web developer in Sydney Australia and the technical lead at Point Blank DevelopmentI've been building websites and web applications in Sydney since Months Supported by. Powered by MEANie.