vue.js style binding problem

• class and style are attributes of HTML elements and are used to set the style of the element. We can use v-bind to set the style attributes.

• The following example sets the class style in the style tag. There is only one Boolean value isActive in the vue instance, using v-bind:class="{ active: isActive }" Bind the style and decide whether to render based on the Boolean value.

<style>.active {    
    width: 100px;    
    height: 100px;    
    background: green;}</style><p id="app">
  <p v-bind:class="{ active: flag}"></p></p><script>new Vue({
  el: &#39;#app&#39;,
  data: {
    flag: true
  }
})
</script>

• Bind multiple classes

 v-bind:class="{ active: isActive, 'text-danger': hasError }">

• Bind multiple classes in the form of objects class

<p id="app">
  <p v-bind:class="classObject"></p></p><script>new Vue({
  el: &#39;#app&#39;,
  data: {
    classObject: {
      active: true,      
      &#39;text-danger&#39;: true
    }
  }
})
</script>

• Bind the style as an array

<p id="app">
    <p v-bind:class="[activeClass, errorClass]"></p></p><script>new Vue({
  el: &#39;#app&#39;,
  data: {
    activeClass: &#39;active&#39;,
    errorClass: &#39;text-danger&#39;
  }
})
</script>

• Inline style Binding

<p id="app">
    <p v-bind:style="{ color: activeColor, fontSize: fontSize + &#39;px&#39; }">菜鸟教程</p></p><script>new Vue({
  el: &#39;#app&#39;,
  data: {
    activeColor: &#39;green&#39;,
    fontSize: 30
  }
})

• Bind inline style using object method

<p id="app">
  <p v-bind:style="styleObject">菜鸟教程</p></p><script>new Vue({
  el: &#39;#app&#39;,
  data: {
    styleObject: {
      color: &#39;green&#39;,
      fontSize: &#39;30px&#39;
    }
  }
})
</script>

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