Skip to main content

How to dynamically bind css and style styles in Vue

 This article mainly introduces the method of dynamically binding CSS styles in the Vue framework. By sharing simple examples, we gradually understand the value transfer and binding data in Vue. The introduction is very detailed and has certain reference value. Friends who need it can refer to it. First of all, let's talk about dynamic binding. Relatively, everyone knows static binding. For static binding, you can directly add class="". Dynamic binding must be based on a certain operation of the user to dynamically modify the style, which is more flexible. convenient.

Mainly introduces three binding methods, string, array, object; the specific code is as follows.

    <style>
        .one{
            color: pink;
        }
        .two{
            color:  red;
        }
        .three{
            border: 1px solid;
        }
        .four{
            width: 100px;
            height: 200px;
            background-color: aquamarine;
        }
        .five{
            font-size: 32px;
        }
    </style>
</head>

<body>
    <div id="app">
        <p class="one" v-bind:class="twoStyle">change</p>
        <p class="one" v-bind:class="arr">change</p>
        <p class="one" v-bind:class="objColor">change</p>
        <h2 :style="FSizetwo">FFONT-SIZE{{FSizetwo}}</h2>
        <h2 :style="FSizethree">FFONT-SIZE</h2>
        <button @click="changeStyle">click1</button>
        <button v-on:click="randStyle()">click2</button>
        <button v-on:click="arrStyle()">click3</button><br/>
        input p4 font-size:<input type="text" v-model:value="FontSize">
    </div>
    <script>
     Vue.config.productionTip=false
        var vm = new Vue({
            el: '#app',
            data: {
                twoStyle:"two",
                objColor:{
                    two:false,
                    five:true
                },
                FontSize:'16px',
                arr:[],
/*                 FSizeone:{
                    fontSize:"fontSize:"+this.FontSize//undefined????Why???
                } */
            },
            methods: {
                changeStyle(){
                    this.twoStyle="three";
                },
                randStyle(){
                    const arr=["three","four","five"];
                    const index=(Math.random()*3)|0;
                    this.twoStyle=arr[index];
                },
                arrStyle(){
                    this.arr=["three","four","five"];
                }
            },
            computed:{
                    FSizetwo(){
                        return "fontSize:"+this.FontSize
                    },
                    FSizethree(){
                        return {
                            fontSize:this.FontSize,
                            color:"red"
                        }
                    }
                }
        });
    </script>

Labels:

Comments

Post a Comment

Popular posts from this blog

favicon.ico 404 Not Found Causes and Solutions

 What is favicon? It is the abbreviation of Favorites Icon. Its function is that in addition to displaying the corresponding title in the browser's favorites, icons can also be used to distinguish different websites. When I encounter this kind of error, I feel very uncomfortable. There is obviously no problem. Why is a 404 error reported? The following is the solution.
Post a Comment
Read more

Use of custom events in Vue components.

 The parent component uses props to pass data (such as a method) to the child component, and the child component needs to use custom events to pass data back to the parent component! We can use v-on to bind custom events, and then pass them to subcomponents, which will call after receiving the method. Each Vue instance implements the Events interface, that is: use $on(eventName) to listen for events and $emit(eventName) to trigger events.
Post a Comment
Read more

mapState, mapGetters, mapMutations, mapActions in vuex

 The above four objects are all in the vuex plug-in store, which is often used to store some data shared globally. But I still feel a little uncomfortable when using it, that is, I wrote a lot of repeated prefixes. At this time, these four objects appeared, which solved this pain point very well. mapState is mainly used to manipulate and obtain data, mapGetters is equivalent to computed properties, and mapMutations and mapActions are simplifications of mutation and action. They can be written as both objects and arrays.
Post a Comment
Read more