el-input中的粘贴事件

 <el-input type="textarea" :rows="5" placeholder="请输入内容" v-model="ruleForm.description" @paste.native='pasteDescription($event)'> </el-input>

		pasteDescription(event){
			var pastedText = undefined
			if (event.clipboardData && event.clipboardData.getData) {
				pastedText = event.clipboardData.getData('Text')
			} else {
				pastedText = event.originalEvent.clipboardData.getData('Text')
			}
			//计算行数
			var rows = pastedText.split("\n")
			var rowsNum=rows.length-1
			if(rowsNum>5){
				let result = pastedText.replace(/\n/g,'')
				console.log(result)
				this.ruleForm.description = ''
			}else{
				console.log(pastedText)
			}

		},