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Vue.js: Handling Dynamic Class Binding with v-bind for Multiple Conditions Leading to Unexpected Results

👀 Views: 321 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-17
vue.js css class-binding reactivity JavaScript

I'm currently working on a Vue.js application (v2.6.12) where I need to dynamically apply multiple CSS classes based on different conditions. I've set up class bindings using `v-bind:class`, but I'm running into unexpected behavior where the classes don't seem to be applied correctly based on the state of my data properties. Here's a simplified version of my template code: ```html <template> <div :class="{ 'active': isActive, 'disabled': isDisabled || hasError }"> Click me! </div> </template> ``` In my script, I have the following data properties: ```javascript <script> export default { data() { return { isActive: false, isDisabled: false, hasError: false }; }, methods: { toggle() { this.isActive = !this.isActive; }, disable() { this.isDisabled = true; }, setError() { this.hasError = true; } } }; </script> ``` My expectation is that when `isActive` is true, the `active` class should be applied, and if either `isDisabled` is true or `hasError` is true, the `disabled` class should also be applied. However, when I toggle `isActive`, the `active` class appears to be applied, but the `disabled` class is showing up unexpectedly even when both `isDisabled` and `hasError` are false. I've logged the values of these properties in the console and confirmed they're behaving as expected, but the classes seem to be mixed up. Am I missing something in how Vue handles reactivity or class binding? Any insights would be greatly appreciated! For reference, this is a production application. Thanks, I really appreciate it!