Vue v-for Tutorial – onlinecode

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2 years ago

Vue v-for Tutorial – onlinecode

In this post, we will give you information about Vue v-for Tutorial. Here we will give you detail about Vue v-for Tutorial And how to use it also give you a demo for it if it is necessary.

The v-for directive is the right way to do list rendering in Vue. If your Vue instance has an array in data, you can render each element in the array using v-for:

const app = new Vue({
  data: () => ({ people: ['Axl Rose', 'Slash', 'Izzy Stradlin'] }),
  // 1 '<li>' for each person in 'people'
  template: '
    <div>
      <h1>Band Members</h1>
      <ul>
        <li v-for="person in people">
          {{person}}
        </li>
      </ul>
    </div>
  '
});

Vue also handles array change detection.
If you were to remove an element from the array using splice(), Vue would remove an <li> from the DOM for you.

// Remove "Izzy Stradlin" from the array, and also from the '<ul>'
this.array.splice(2, 1);

With `v-model`

Although you can loop over an array of strings using v-for,
it won’t work with v-model. The v-model directive won’t
be able to update your array with any changes to the <input>.

  const app = new Vue({
    data: () => ({ people: ['Axl Rose', 'Slash', 'Izzy Stradlin'] }),
    // 1 '<input>' for each person in 'people'
    template: '
      <div>
        <h1>Band Members</h1>
        <div id="people-array">{{people}}</div>
        <ul>
          <li v-for="person in people">
            <input v-model="person">
            <span>{{person}}</span>
          </li>
        </ul>
      </div>
    '
  });

Even though the ‘input’ is updated, the array doesn’t change! The way to work around this is to use an array of objects with v-for.

Whenever you use v-model with v-for, make sure the property you’re binding with v-model is an object property.

  const app = new Vue({
    data: () => ({
      people: [
        { name: 'Axl Rose' },
        { name: 'Slash' },
        { name: 'Izzy Stradlin' }
      ]
    }),
    template: '
      <div>
        <h1>Band Members</h1>
        <div id="people-array">{{people}}</div>
        <ul>
          <li v-for="person in people">
            <input v-model="person.name">
            <span>{{person.name}}</span>
          </li>
        </ul>
      </div>
    '
  });

With Objects for Vue v-for Tutorial

You can also use v-for to loop over the keys of an object using the v-for="(value, key) in obj" syntax.
Note that v-for only loops over own properties.

const app = new Vue({
  data: () => ({
    people: {
      singer: 'Axl Rose',
      guitarist: 'Slash',
      bassist: 'Duff McKagan'
    }
  }),
  // 3 '<li>' elements: "Axl Rose - singer", "Slash - guitarist",
  // and "Duff McKagan - bassist"
  template: '
    <div>
      <h1>Band Members</h1>
      <ul>
        <li v-for="(value, key) in people">
          {{value}} - {{key}}
        </li>
      </ul>
    </div>
  '
});

Vue School has some of our favorite Vue video courses. Their Vue.js Master Class walks you through building a real world application, and does a great job of teaching you how to integrate Vue with Firebase.
Check it out for Vue v-for Tutorial!

Vue.js is a progressive JavaScript framework that makes building user interfaces simple and enjoyable. Vue is designed from the ground up to be incrementally adoptable, so you can use the features you need, and mix and match Vue with other libraries or frameworks.

Vue is a relatively new framework, but it has quickly become one of the most popular JavaScript frameworks in the world. It is used by large companies like Alibaba, Baidu, and Xiaomi, as well as by thousands of smaller businesses and startups.

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If you are looking for a JavaScript framework that is easy to learn, powerful, and performant, then Vue.js is a great choice.

Here are some of the things you can do with Vue.js:

Build single-page applications
Create user interfaces for web, mobile, and desktop applications
Integrate with other JavaScript frameworks and libraries
Build custom components
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Test your code

If you are interested in learning more about Vue.js, there are a number of resources available online. The official Vue.js website has a comprehensive documentation and a number of tutorials. There are also a number of third-party websites and blogs that offer tutorials, articles, and other resources about Vue.js.

Vue v-for Tutorial – onlinecode

With v-model

With Objects for Vue v-for Tutorial

With `v-model`