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