Vue.js Textbox with Dropdown component

A Textbox with Dropdown allows users to select an input from a drop-down list or type the input value freely. This is a relatively common UI element. It can provide users with alternative options to save operation time, and it can also provide adaptation possibilities for possible minority situations.

I originally thought that this component is quite common and there should be many ready-made examples that can be directly applied. However, after searching around, I found that many similar components have too many functions, such as search, multiple selection, etc. (In short: too complicated!). So I thought I should write a simple and easy-to-use one myself. I would like to thank Mr. Fei for his great help when I was confused.

This UI element will be used in the Common Bar Width App.

Registering Components

When designing, it was considered that there may be different types of input boxes, such as text input boxes, numeric input boxes, percentage input boxes, etc. Therefore, the inputRule function is used to restrict input in the encapsulated code. The limiting method is to use Regex to filter. If there are other types, you can also modify the filtering conditions in inputRule .

<script type="text/x-template" id="dropdown">
    <div class="dropdown" v-if="options">
        <!-- Dropdown Input -->
        <input :type="type"
                :disabled="disabled"
                v-model="input_value"
                @focus="showOptions()"
                @blur="exit()"
                @keyup="keyMonitor"
                @input="input_value = inputRule(type)" />
...
</script>
<script>
    Vue.component('dropdown', {
        template: '#dropdown',
        props: {
            type: String,
            options: Array,
            disabled: Boolean,
            value: String
        },
...
        methods: {
            inputRule:function(type){
                var value;
                switch(type){
                    case 'text':
                        value = this.input_value.replace(/[^a-zA-Z0-9]/g,'');
                        break;
                    case 'number':
                        value = this.input_value.replace(/^(?![+-]?\d+(\.\d+)?$)/g,'');
                        break;
                    case 'percentage':
                        value = this.input_value.replace(/[^\d]/g,'');
                        value = value > 100 ? '100' : value;
                        value = value < 0 ? '0' : value;
                        break;
                    default:
                        console.log("no limitation");
                }
                return value;
            },
...
</script>

Calling Components

Add a custom label calling component.

<dropdown type = "text"
            :options = "text_options" 
            :value = "text_value"
            :disabled = "text_disabled" 
            @on_change_input_value = "onTextChange">
</dropdown>

Passing Data

Finally, dynamically bind the data to the parent component in props:

type: The type of the input box, currently supports text, number and percentage.
options: options for the input box drop-down list
value: the value of the input box
disabled: Whether to prohibit clicking the input box

In addition, we also need to define things in the parent instance to update the value of the input box

on_change_input_value: Update value

data: function () {
    return {
        text_value: 'ccc',
        text_disabled: false,
        text_options: [
            { id: 1, name: 'a' },
            { id: 2, name: 'bb' },
            { id: 3, name: 'ccc' },
            { id: 4, name: 'dddd' },
            { id: 5, name: 'eeeee' },
            { id: 6, name: 'fffff ' },
            { id: 7, name: 'gggggg' },
            { id: 8, name: 'hhhhhhh' },
            { id: 9, name: 'iiiiiiii' },
        ],
        ...
    }
},
...
methods: {
    onTextChange: function (new_text_value) {
        this.text_value = new_text_value;
    },
...
},

source code

GitHub

This is the end of this article about the Vue.js Textbox with Dropdown component. For more information about the Vue.js Textbox with Dropdown component, please search for previous articles on 123WORDPRESS.COM or continue to browse the following related articles. I hope you will support 123WORDPRESS.COM in the future!

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