The Vue v-model-bound HTML element is unable to update the Vue instance when a different JavaScript entity binds to it and modifies the data

In my project, I have implemented Vue.js for two-way data binding on a remote control alarm clock. The main code can be found here.

You can access the running instance of the server here.

While most of the page uses Vue and JavaScript for rendering, I decided to integrate the bootstrap color picker due to its simplicity. However, integrating this color picker caused issues with accessing pre-rendered variables of the Vue root instance. To address this, I used

document.getElementById().style.display = "..."
to show or hide the color picker based on user interactions.

Below is how I defined my Vue app instance, where the color picker code is placed as the last element:

<div id="app"> <!--Vue.js-->
    <!-- Your app content goes here -->
</div><!--app-->

For script handling, I set up various functions in Vue methods to handle actions like submitting time, toggling sound settings, and managing email notifications. Additionally, I utilized jQuery and Bootstrap dependencies for further functionality.

One challenge I encountered was synchronizing changes made via the color picker's UI directly to the Vue data value. While typing in the text box correctly updated the color map position and Vue data, changing values using the color map did not reflect back to the Vue data. How can I ensure that changes made through the color picker interface update the Vue data accordingly?

Appreciate any insights or suggestions. Thank you.

Answer №1

When working with Vue and ColorPicker, it is essential to establish a connection between the two independent components. By binding a change event handler to ColorPicker, you can ensure that any changes made in ColorPicker reflect in Vue, and vice versa. Here is a simplified solution to achieve this:

new Vue({
    el: '#app',
    data: {
        colors: ''
    },
    methods: {
        setColorToVue: function(hex) {
            Vue.set(this, 'colors', hex);
        },
        setColorToColorPicker: function(hex) {
            $("#color").colorpicker('setValue', hex);
        }
    },
    mounted: function() {
        var self = this;
        $('#color').colorpicker().on('changeColor', function(e) {
            self.setColorToVue(e.color.toHex());
        });
        setTimeout(function() {
            self.setColorToColorPicker('#000000');
        }, 1000);
    }
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.9/vue.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet"/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-colorpicker/2.3.3/js/bootstrap-colorpicker.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-colorpicker/2.3.3/css/bootstrap-colorpicker.min.css" rel="stylesheet"/>


<div id="app">
  {{colors}}
  <br />
  <input id="color" type="text" />
</div>

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