What is the ideal event to trigger a response when the user completes entering text into the search field in Vue.js?

Question

What is the ideal event to trigger a response when the user completes entering text into the search field in Vue.js?

I am currently utilizing a text field from the Vuetify library to filter a table within my application.

<v-text-field
  style="min-width: 300px;"
  v-model="filterString"
  label="Search" />

The functionality is straightforward - whenever the user enters a new filter value, the table content should be updated. There is no need for a submit button as the filtering process is handled on the backend, requiring a request to be sent to the API for each update. I am using a Vue.js watcher to trigger the API request when the filter string changes.

watch: {
  async filterString() {
    // logic to communicate with the API
  },
},

However, I am facing an issue where if the user types a 10-letter string in the search box, my application sends 10 unnecessary requests to the API. I am considering implementing a delay before sending a request or subscribing to an event that indicates when the user has finished typing. How can I ensure that a request is only sent after the user has finished typing in the text box? Any suggestions would be greatly appreciated.

javascript vue.js filter vuetify.js

Answer 1

Answer №1

If you're searching for a way to debounce user input in your web application, debouncing is the solution. It involves setting a timer to wait for the user to stop pressing keys before taking action.

Below is a simple implementation using lodash debounce:

template:

    <input
            :value="input"
            @change="evt=>textChange(evt.target.value)"
            @input="evt=>textEntry(evt.target.value)"               
    />

javascript:

Imports:

 import { debounce } from 'lodash'

Definition:

 model: {
    prop: 'input',
    event: 'input'
  },
 props: {
    input: {
      default: '',
      type: String
    },
    debounce: {
      default: -1,
      type: Number
    }
  },
 methods: {
    textChange (value) {
        this.$emit('input', value)
      }
    },
    textEntry (value) {
      // Covering for cases where change event runs first
      if (value.toUpperCase() === this.input.toUpperCase()) return
      if (this.debounce >= 0) {
        this.emitValue(value)
      } else {
        this.$emit('input', value)
      }
    }
  },
  async mounted () {
    this.emitValue = debounce(value => {
      this.$emit('input', value)
    }, Math.abs(this.debounce))
    await this.$nextTick()
    this.textChange(this.input) // applying loaded content and allowing bindings to run
  }

Answer 2

If you're searching for a way to debounce user input in your web application, debouncing is the solution. It involves setting a timer to wait for the user to stop pressing keys before taking action.

Below is a simple implementation using lodash debounce:

template:

    <input
            :value="input"
            @change="evt=>textChange(evt.target.value)"
            @input="evt=>textEntry(evt.target.value)"               
    />

javascript:

Imports:

 import { debounce } from 'lodash'

Definition:

 model: {
    prop: 'input',
    event: 'input'
  },
 props: {
    input: {
      default: '',
      type: String
    },
    debounce: {
      default: -1,
      type: Number
    }
  },
 methods: {
    textChange (value) {
        this.$emit('input', value)
      }
    },
    textEntry (value) {
      // Covering for cases where change event runs first
      if (value.toUpperCase() === this.input.toUpperCase()) return
      if (this.debounce >= 0) {
        this.emitValue(value)
      } else {
        this.$emit('input', value)
      }
    }
  },
  async mounted () {
    this.emitValue = debounce(value => {
      this.$emit('input', value)
    }, Math.abs(this.debounce))
    await this.$nextTick()
    this.textChange(this.input) // applying loaded content and allowing bindings to run
  }

Answer 3

Answer №2

Instead of making multiple "useless" requests, you can utilize the Vuetify event @change along with a debouncing tool.

Two options to achieve this are:

Utilize a npm package like this one
Implement it yourself (you can refer to this thread for assistance)

Answer 4

Instead of making multiple "useless" requests, you can utilize the Vuetify event @change along with a debouncing tool.

Two options to achieve this are:

Utilize a npm package like this one
Implement it yourself (you can refer to this thread for assistance)

What is the ideal event to trigger a response when the user completes entering text into the search field in Vue.js?

Answer №1

Answer №2

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