Guide to dynamically adding a class in VueJS based on a certain condition

Question

Guide to dynamically adding a class in VueJS based on a certain condition

I'm in the process of transitioning a project to Vue, and I'm curious about how I can dynamically assign classes to specific elements based on database values rendered with Vue. Previously, I had this code set up without Vue:

$(document).ready(function() {
  $('.task_element').each(function(index, element) {
    if ($(element).find(".task_priority").text().trim() === "high") {
      $(element).addClass('high');
    } else if ($(element).find(".task_priority").text().trim() === "medium") {
      $(element).addClass('medium');
    } else if ($(element).find(".task_priority").text().trim() === "low") {
      $(element).addClass('low');
    }
  });
});

It worked perfectly fine. However, I'm wondering if there's a more straightforward way to achieve this with Vue, or if I need to somehow incorporate this into my Vue application.

Here is a snippet of the component:

<p class="task_description">
  {{ task.description }} <span class="badge badge-pill">priority</span>
</p>
<p class="task_priority">
  {{ task.priority }}
</p>

What I aim to do is dynamically apply a class to the badge element (either high, medium, or low) based on the value of the task_priority element. How can I achieve this?

javascript vue.js vuejs2 vue-component

Answer 1

Answer №1

If you're looking to add conditional classes in your HTML template, give this code a try:

<element v-bind:class="condition ? 'class_if_is_true' : 'else_class'"></element>

For more information on this topic, check out the official Vue documentation.

Answer 2

If you're looking to add conditional classes in your HTML template, give this code a try:

<element v-bind:class="condition ? 'class_if_is_true' : 'else_class'"></element>

For more information on this topic, check out the official Vue documentation.

Answer 3

Answer №2

To conditionally add a class only if a certain condition is met, you can utilize the following syntax:

<p v-bind:class="{ 'className' : priority === low}"></p>

Alternatively, you can opt for a shorthand version by excluding v-bind

<p :class="{ 'className' : priority === low}"></p>

This approach eliminates the need to worry about the condition evaluating to false.

Answer 4

To conditionally add a class only if a certain condition is met, you can utilize the following syntax:

<p v-bind:class="{ 'className' : priority === low}"></p>

Alternatively, you can opt for a shorthand version by excluding v-bind

<p :class="{ 'className' : priority === low}"></p>

This approach eliminates the need to worry about the condition evaluating to false.

Answer 5

Answer №3

By using Vue's class binding feature, you have the ability to add an extra computed class directly to the element along with your existing class list.

For instance:

<div class="task_priority" :class="task.priority">{{ task.priority }}</div>

You can then style it accordingly (assuming the task.priority output is high, medium, or low based on your provided code snippet)

.task_priority.high {color: red}
.task_priority.medium {color: yellow}
.task_priority.low {color: green}

Answer 6

By using Vue's class binding feature, you have the ability to add an extra computed class directly to the element along with your existing class list.

For instance:

<div class="task_priority" :class="task.priority">{{ task.priority }}</div>

You can then style it accordingly (assuming the task.priority output is high, medium, or low based on your provided code snippet)

.task_priority.high {color: red}
.task_priority.medium {color: yellow}
.task_priority.low {color: green}

Answer 7

Answer №4

If you're facing complex conditions, consider creating a function to handle them. You can pass the condition compare value to the function and then use it in your code like this:

<span bind:class="BindOrderStatus(order.status)">{{order.status}}</span>

Here's an example of how you can write the function:

 methods: {
    BindOrderStatus: function (status){
        if(status === "received")
        {
            return "badge badge-pill badge-primary pending-badge";
        }else if(status === "accepted" || status === "auto-accepted"){
            return "badge badge-pill badge-primary in-progress-badge"
        }.......etc conditions

}

Using a function like this can make handling complex conditions much easier in your code.

Answer 8

If you're facing complex conditions, consider creating a function to handle them. You can pass the condition compare value to the function and then use it in your code like this:

<span bind:class="BindOrderStatus(order.status)">{{order.status}}</span>

Here's an example of how you can write the function:

 methods: {
    BindOrderStatus: function (status){
        if(status === "received")
        {
            return "badge badge-pill badge-primary pending-badge";
        }else if(status === "accepted" || status === "auto-accepted"){
            return "badge badge-pill badge-primary in-progress-badge"
        }.......etc conditions

}

Using a function like this can make handling complex conditions much easier in your code.

Guide to dynamically adding a class in VueJS based on a certain condition

Answer №1

Answer №2

Answer №3

Answer №4

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