做了个输入框限制字符数

Antv（类ElementUi框架）html部分结合ants设计：":maxLength="maxLength":autoFocus="autoFocus":rows="4"placeholder="请输入问题描述"v-decorator="['retPras',validatorRules.retPras]"/>你也可以输入{{remnant}}的话。data.returnpart:data(){return{val:'',val2:'',val3:'',maxLength:800,autoFocus:true,retPras:{规则:[{required:true,message:'请输入问题的描述！'},{validator:this.validateRetPras}]},}}data.computedpart:computed:{remnant(){returnthis.maxLength-this.有效长度；},},data.methods部分：方法：{countFont(){this.maxLength=this.maxLength-20},validateRetPras(rule,value,callback){value=value.replace(/[\r\n\]/g,'')if(value&&newRegExp(/^.{0,800}$/).test(value)){this.val=value,callback()}else{callback('请输入有效长度内的字符数')}}，基本上就这样，结束了！！