How to use filters in vue

Vue.js filters can be used to transform or format data for display in customized templates. Global filters are available throughout the application, while local filters are available only within components or templates. Filters can be applied using the pipe symbol (|) followed by the filter name and arguments, which are passed in colons (:), and multiple filters can be chained to apply multiple transformations.

Filters in Vue.js

Filters are used for conversion or formatting in Vue.js Data specific instructions. They can be applied to expressions or components to customize how data is displayed in the template.

Usage

To use a filter, you need to precede the filter name with a pipe symbol (|) followed by the data to be applied:

<code>{{ data | filterName }}</code>

For example:

<code>{{ message | uppercase }}</code>

The above code will convert the value of the message variable to uppercase.

Create custom filters

Custom filters can be created in two ways:

Global filters:
Global filters are available throughout the application. They are registered when Vue is instantiated:

<code>const app = new Vue({
  filters: {
    myFilter(value) { /* 过滤器逻辑 */ }
  }
});</code>

Local filters:
Local filters are only available within specific components or templates. They are defined in this component or template:

<code><template>
  <div>{{ message | myFilter }}</div>
</template>

<script>
export default {
  methods: {
    myFilter(value) { /* 过滤器逻辑 */ }
  }
};
</script></code>

Filter parameters

Filters can receive parameters, passed through colon (:):

<code>{{ data | filterName: argument }}</code>

For example:

<code>{{ date | dateformat: 'YYYY-MM-DD' }}</code>

The above code converts the value of the date variable to a specific date format.

Chained Filters

Filters can be chained to apply multiple transformations to your data:

<code>{{ data | filter1 | filter2 | ... }}</code>

For example:

<code>{{ message | uppercase | truncate(20) }}</code>

The above code converts the value of the message variable to uppercase, and then intercepts it into 20 characters.

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