//可以输入空格
<el-input class=‘left-text’ type=“textarea” v-model=“a” placeholder=“请输入” clearable :disabled=“disabled” @change=“aChange()”>
//v-model.trim="a"不可以输入空格
<el-input class=‘left-text’ type=“textarea” v-model.trim=“a” placeholder=“请输入” clearable :disabled=“disabled” @change=“aChange()”>