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In Vue, we often need to dynamically bind different class names according to different situations, such as changing the style of a button according to the user's operation status, or changing the style of a table according to the type of data. Vue provides a variety of methods to achieve this function, and this article will introduce several common methods.

Object syntax

Object syntax is the most commonly used method for dynamically binding class names in Vue. It can dynamically bind different class names based on the property values ​​in an object. For example:

<template>
  <div :class="{ active: isActive, 'text-danger': isError }">Hello World</div>
</template>

<script>
export default {
  data() {
    return {
      isActive: true,
      isError: false,
    };
  },
};
</script>

In the above example, we define an object with two properties, isActiveand isError. When isActiveis true , the element is bound to the active class name; when isErroris true , the element is bound to the text-danger class name.

Array Syntax

Array syntax is another commonly used method for dynamically binding class names. It can dynamically bind different class names based on the elements in an array. For example:

<template>
  <div :class="[activeClass, errorClass]">Hello World</div>
</template>

<script>
export default {
  data() {
    return {
      activeClass: 'active',
      errorClass: 'text-danger',
    };
  },
};
</script>

In the above example, we define an array with two elements, activeClass and errorClass. When the value of activeClass is 'active', the element will be bound to the active class name; when the value of errorClass is 'text-danger', the element will be bound to the text-danger class name.

Array syntax + object syntax

Array syntax and object syntax can be used in combination to implement more complex dynamic binding class name requirements. For example:

<template>
  <div :class="[isActive ? activeClass : '', { 'text-danger': isError }]">Hello World</div>
</template>

<script>
export default {
  data() {
    return {
      isActive: true,
      activeClass: 'active',
      isError: false,
    };
  },
};
</script>

In the above example, we define an array and an object. When isActiveis true , the element will be bound to the active class name; when isErroris true , the element will be bound to the text-danger class name.

Summarize

The above are several common methods for dynamically binding multiple different class names in Vue. We can choose different methods to implement the function of dynamically binding class names according to actual needs.