placeholder for dropdown selection in Vue.js version 2.0.0

Question

placeholder for dropdown selection in Vue.js version 2.0.0

Currently, I am in the process of developing a web application using vuejs 2.0. In order to create a straightforward select input, I employed the following code:

<select v-model="age">
    <option value="" disabled selected hidden>Select Age</option>
    <option value="1"> 1 Year</option>
    <option value="11"> 11 Year</option>
</select>

In addition, within the data section of my Vue component, I have defined:

data () {
  return {
    age: "",
  }
},
watch: {      
  age: function (newAge) {
    console.log("log here")
  }

Nevertheless, I encountered an error message upon setting a default value for the select element:

ERROR in ./~/vue-loader/lib/template-compiler.js?id=data-v-5cf0d7e0!./~/vue-loader/lib/selector.js?type=template&index=0!./src/components/cde.vue template syntax error : inline selected attributes on will be ignored when using v-model. Declare initial values in the component's data option instead.

@ ./src/components/cde.vue 10:23-151

@ ./~/babel-loader!./~/vue-loader/lib/selector.js? type=script&index=0!./src/views/abcView.vue @ ./src/views/abcView.vue

@ ./src/router/index.js

@ ./src/app.js

@ ./src/client-entry.js

@ multi app

I attempted assigning a default value within the data section of the component, but it did not yield the desired outcome. Furthermore, I experimented with v-bind, only to find that it caused the watchers to cease functioning properly for the 'age' variable.

javascript select vue.js vuejs2

Answer 1

Answer №1

If you find yourself in a situation where the default option is not appearing, there may be an additional step required. In my experience, I had to make sure that the v-model I was using did not return null, but actually returned an empty string. This way, the default option would be selected properly once Vue bindings were activated.

To address this issue, simply bind the value property of your default option to null:

<select v-model="age">
  <option :value="null" disabled>Select Age</option>
  ...
</select>

http://jsfiddle.net/2Logme0m/1/

Answer 2

If you find yourself in a situation where the default option is not appearing, there may be an additional step required. In my experience, I had to make sure that the v-model I was using did not return null, but actually returned an empty string. This way, the default option would be selected properly once Vue bindings were activated.

To address this issue, simply bind the value property of your default option to null:

<select v-model="age">
  <option :value="null" disabled>Select Age</option>
  ...
</select>

http://jsfiddle.net/2Logme0m/1/

Answer 3

Answer №2

All that was required to activate this function was to delete the selected keyword from the default option:

 <select v-model="age">
    <option value="" disabled hidden>Select Age</option>
    .....
  </select>

Answer 4

All that was required to activate this function was to delete the selected keyword from the default option:

 <select v-model="age">
    <option value="" disabled hidden>Select Age</option>
    .....
  </select>

Answer 5

Answer №3

When using a placeholder, make sure to set the value attribute to match the initial value defined in your state.

Replace your disabled option with

<option value="null" disabled selected hidden>Select Age</option>

Then in the state, initialize it like this

data () {
  return {
    age: null,
  }
}

Answer 6

When using a placeholder, make sure to set the value attribute to match the initial value defined in your state.

Replace your disabled option with

<option value="null" disabled selected hidden>Select Age</option>

Then in the state, initialize it like this

data () {
  return {
    age: null,
  }
}

Answer 7

Answer №4

To enhance Shivam Bisht's suggestion, if you are unable to access the default value, simply include value="undefined" in your placeholder option tag.

Placeholder text

var app = new Vue({
  el: '#app',
  data: function() {
    return {
      selection: undefined,
    };
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <select v-model="selection">
    <option value="undefined" disabled>Placeholder text</option>
    <option value="1">French cuisine is delicious.</option>
    <option value="11">Italian cars are fast.</option>
  </select>
</div>

Answer 8

To enhance Shivam Bisht's suggestion, if you are unable to access the default value, simply include value="undefined" in your placeholder option tag.

Placeholder text

var app = new Vue({
  el: '#app',
  data: function() {
    return {
      selection: undefined,
    };
  }
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
  <select v-model="selection">
    <option value="undefined" disabled>Placeholder text</option>
    <option value="1">French cuisine is delicious.</option>
    <option value="11">Italian cars are fast.</option>
  </select>
</div>

Answer 9

Answer №5

Building upon the existing answers, it is important to note that they are all accurate under certain conditions: The behavior depends on the data type expected by your v-model variable. For instance, if it expects an integer, using :value="null" or :value="undefined" would be suitable. However, if it anticipates an object, then you should use :value="{}".

//Example: data/v-model expects integer
<select v-model="param">
   <option :value="undefined" disabled>Placeholder text</option>
   <option value="1">1</option>
   <option value="11">11</option>
</select>

//Example: data/v-model expects object
<select v-model="param">
   <option :value="{}" disabled>Placeholder text</option>
   <option
        v-for="item in items"
        :key="item.id"
        :value="item"
      >
        {{ item.propery }}
   </option>
</select>

For a string, null or undefined values may suffice, but alternatively, you can set a placeholder within your data object.

Answer 10

Building upon the existing answers, it is important to note that they are all accurate under certain conditions: The behavior depends on the data type expected by your v-model variable. For instance, if it expects an integer, using :value="null" or :value="undefined" would be suitable. However, if it anticipates an object, then you should use :value="{}".

//Example: data/v-model expects integer
<select v-model="param">
   <option :value="undefined" disabled>Placeholder text</option>
   <option value="1">1</option>
   <option value="11">11</option>
</select>

//Example: data/v-model expects object
<select v-model="param">
   <option :value="{}" disabled>Placeholder text</option>
   <option
        v-for="item in items"
        :key="item.id"
        :value="item"
      >
        {{ item.propery }}
   </option>
</select>

For a string, null or undefined values may suffice, but alternatively, you can set a placeholder within your data object.

Answer 11

Answer №6

After much trial and error, I finally figured out a solution that worked:

<select v-model="selectedTemplate" class="btn btn-default">
   <option v-for="template in templates" v-bind:value="template.tasks"}{{template.name}}</option>
   <option :value="this.selectedTemplate" disabled hidden>Select a template</option>
</select>

The crucial aspect was the :value=this.selectedtemplate in the disabled hidden option.

Answer 12

After much trial and error, I finally figured out a solution that worked:

<select v-model="selectedTemplate" class="btn btn-default">
   <option v-for="template in templates" v-bind:value="template.tasks"}{{template.name}}</option>
   <option :value="this.selectedTemplate" disabled hidden>Select a template</option>
</select>

The crucial aspect was the :value=this.selectedtemplate in the disabled hidden option.

placeholder for dropdown selection in Vue.js version 2.0.0

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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