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超轻量级php框架startmvc

100行代码实现vue表单校验功能(小白自编)

更新时间:2020-09-24 01:30:01 作者:startmvc
两个文件,一个写逻辑,一个写校验规则;特点:逻辑简单,代码量少,够用;不想看代码

两个文件,一个写逻辑,一个写校验规则;

特点:逻辑简单,代码量少,够用;

不想看代码直接新建这两个文件复制代码,看最下面的使用方法;

示例图片


//validator.js
//引入校验规则
var valitatorRules = require('./valitator-rules.js');

export const Validator=function(formName,rules,errors){
// rules:{
// name:'required|regexp_hanzi',
// idCont: 'regexp_I'
// }
this.rules = rules;
// let errors = {
// name:{
// required:'不能为空',
// regexp_hanzi:'得是汉字'
// },
// idCont:{
// regexp_I:'身份证号不对',
// regexp_H:'香港通行证不对',
// regexp_T:'台湾通行证不对',
// }
// };
this.error = errors;
this.form = document.forms[formName];
this.validatorList = [];
this.init();
}
//初始化
Validator.prototype.init = function(){
for (let key in this.rules){
 let node = this.findNode(key);
 this.validatorList.push({
 name: key,
 value: '',
 childrenNode:node.childrenNode,
 parentNode: node.parentNode,
 borderColor:getComputedStyle(node.childrenNode).borderColor,
 ruleReg:this.defineRule(key),//[{rule:'hanzi',valitatorRules:fn(this.value),error:'请输入汉字'}]
 errors :'',
 })
}
};
//动态修改校验规则
Validator.prototype.changeRules = function(rules,param){
let arrs = Object.keys(rules);
this.rules = {
 ...this.rules,
 ...rules
}
this.validatorList.forEach(val => {
 if(arrs.includes(val.name)){
 val.ruleReg = this.defineRule(val.name)
 }
})
if(param){
 return this.validate(param)
}
};
//校验执行者
Validator.prototype.validate = function(param){
let errorList =[];
return new Promise((resolve,reject) => {
 for (let key in param){
 this.validatorList.forEach(val => {
 if(val.name == key){
 val.value = param[key];
 this.runValidator(val);
 }
 })
 
 }

 this.validatorList.forEach(val => {
 Object.keys(param).forEach(v => {
 if(val.name == v && val.errors){
 errorList.push(val);
 }
 })
 })
 if(errorList.length > 0){
 reject(this)
 }else{
 resolve()
 }
})
}
//暴露出的展示错误
Validator.prototype.showError = function(name){
if(name){
 let module;
 this.validatorList.forEach(val => {
 if(val.name == name){
 module = val;
 }
 })
 if(module.errors){
 this.createError(module);
 } 
 
}else{
 this.validatorList.forEach(val => {
 if(val.errors){
 this.createError(val);
 }
 
 }) 
}

}
//执行校验工具;
Validator.prototype.runValidator = function(module){

let n = 0;
function run(param){
 if (n>=module.ruleReg.length){
 return
 }
 if(param.valitatorRules(module.value)){// 验证通过
 module.errors = '';
 n++;
 run(module.ruleReg[n]);
 
 } else{
 module.errors = param.error;
 }
} 
run(module.ruleReg[n]);

if(module.errors.length == 0 && module.newChildNode){
 this.clear(module);
}
}
//寻找节点
Validator.prototype.findNode= function(childenName){
let form = this.form;
let childrenNode = form.querySelector(`input[name="${childenName}"]`) || form.querySelector(`textarea[name="${childenName}"]`);
let parentNode = childrenNode.parentNode;
return {
 childrenNode,
 parentNode
}
};
//寻找验证规则
Validator.prototype.defineRule =function(name){
let rule = [],ruleString='';
for(let key in this.rules){
 if(name == key){
 ruleString = this.rules[key];
 }
}
let arr= ruleString.split('|');

arr.forEach(val => {
 if(valitatorRules[val]){
 console.log(this)
 rule.push({
 rule:val,
 valitatorRules:valitatorRules[val],
 error:this.error[name][val]
 })
 }
})

return rule;
}
//生产错误提示
Validator.prototype.createError = function(module){
if(module.newChildNode){
 module.newChildNode.innerText = module.errors;
 return
}
let newChildNode = document.createElement('div');
newChildNode.className='_errorMessage';
newChildNode.style.color = 'red';
newChildNode.style.fontSize = '12px';
newChildNode.innerText = module.errors;
module.newChildNode = newChildNode;
module.childrenNode.style.borderColor = 'red';
if(module.childrenNode.nextSibling){
 module.parentNode.insertBefore(newChildNode,module.childrenNode.nextSibling);
}else{
 module.parentNode.appendChild(newChildNode);
}
}
//清除错误提示
Validator.prototype.clear = function(module){
if(module){
 module.childrenNode.style.borderColor = module.borderColor;
 module.parentNode.removeChild(module.newChildNode);
 module.newChildNode = null;
}else{
 this.validatorList.forEach(val => {
 if(val.newChildNode){
 val.childrenNode.style.borderColor = val.borderColor;
 val.parentNode.removeChild(val.newChildNode);
 val.newChildNode = null;
 }
 })
}
}

下面是校验规则,就更简单

说明一下,非空校验没有做单独处理,所以校验规则这里就多写个if else;


//validator-rule.js
module.exports= {
hanzi:function(str){
 if(str){
 let reg = /[\u4e00-\u9fa5]/;
 return reg.test(str);
 }else{
 return true;
 }
 
},
required:function(str){
 return !(str.length == 0)
},
I:function(str){
 if(str){
 let reg = /i/;
 return reg.test(str);
 }else{
 return true;
 }
},
H:function(str){
 if(str){
 let reg = /h/;
 return reg.test(str);
 }else{
 return true;
 }
},
T:function(str){
 if(str){
 let reg = /t/;
 return reg.test(str);
 }else{
 return true;
 }
},
}

使用方法


**引入校验插件 import {Validator} from '@src/utils/valitator'**
 **校验规则可自行修改添加 @src/utils/valitator-rules**
 ****
 1.添加form name属性<form name='example_form'></form>
 2.定义错误提示errors = {
 name:{
 required:'不能为空',
 hanzi:'得是汉字'
 },
 idCont:{
 I:'身份证号不对',
 H:'香港通行证不对',
 T:'台湾通行证不对',
 }
 };

    3.定义校验规则


rules ={
 name:'required|hanzi',
 idCont: 'I'
 }

    4.初始化校验实例:this.Validator =new Validator('example_form',rules,errors);

    5.绑定校验信息:input增加name属性,保持和错误提示key一致  <input type="text" name='name' v-model='name'>

    6.执行校验:传入要校验的key和value;


 this.Validator.validate({
 [name]:this[name],
 }).then(()=>{

 }).catch((errorCb)=>{
 console.log(errorCb)
 errorCb.showError();//展示错误提示,如果只展示某个提示,传入对应的值errorCb.showError('name')
 });

    7.动态跟换校验规则,如证件类型更换:


 this.Validator.changeRules(
 {idCont:this.idType},//传入新的校验规则
 {idCont:this.idCont})//传入校验的key和value进行校验
 .then(()=>{

 }).catch((errorCb)=>{
 errorCb.showError('idCont');
 });

    8:注意事项:每个input要用div包起来,保证错误信息位置正确添加;

    this.Validator.clear();清空所有错误提示

总结

以上所述是小编给大家介绍的100行代码vue表单校验,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持! 如果你觉得本文对你有帮助,欢迎转载,烦请注明出处,谢谢!

vue表单校验 vue表单