How to use v-model.trim to remove spaces from input box data in Vue

Vue is a popular JavaScript framework for building responsive web pages. v-model is one of the most commonly used directives in Vue, used for two-way binding of data and form controls. And v-model.trim is a special usage of v-model, which is used to remove the leading and trailing spaces in the data in the input box.

In Vue, we can use the v-model.trim directive to implement the space removal function for form controls. For example, we can bind the v-model.trim directive to a text box as follows:

<template>
  <div>
    <label for="username">用户名：</label>
    <input type="text" id="username" v-model.trim="username">
    <p>去空格后的用户名：{{ trimmedUsername }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      username: '',
    }
  },
  computed: {
    trimmedUsername() {
      return this.username.trim()
    },
  },
}
</script>

In the above code, we bind the value of the text box to a data named "username" attributes, and use the v-model.trim directive to implement the space removal function. In addition, we also define a calculated attribute "trimmedUsername" to display the username after removing spaces.

It should be noted that the v-model.trim directive can only be used for text input controls, such as and , and is not applicable to other types of form controls. .

In addition, we can also add the v-model.trim directive to various form controls in the component to achieve the function of removing spaces. For example, in the following component, we bind the values ​​​​of multiple text boxes to the data attributes of the same name, and use the v-model.trim directive to implement the function of removing spaces:

<template>
  <div>
    <label for="username">用户名：</label>
    <input type="text" id="username" v-model.trim="username">
    <p>去空格后的用户名：{{ trimmedUsername }}</p>
    <label for="password">密码：</label>
    <input type="password" id="password" v-model.trim="password">
    <p>去空格后的密码：{{ trimmedPassword }}</p>
  </div>
</template>

<script>
export default {
  data() {
    return {
      username: '',
      password: '',
    }
  },
  computed: {
    trimmedUsername() {
      return this.username.trim()
    },
    trimmedPassword() {
      return this.password.trim()
    },
  },
}
</script>

In short, through Using the v-model.trim directive, we can easily remove spaces from input box data in Vue, improving user experience and data security.

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