本文的原文连接是:
https://blog.csdn.net/freewebsys/article/details/81153733
博主地址是：http://blog.csdn.net/freewebsys
1，关于mozilla 开发者
https://developer.mozilla.org/zh-CN/
还有这么一个开发者中心呢，上面搜索写JavaScript的东西也相当的全面。
开始是使用 firefox，现在使用了 chrome就再也不看 mozilla 的东西了。
但是人家有个号东西也去学习。
https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Guide/Introduction
学习javascript
2，学习
虽然写javascript好多年，但是一些高级的用法不会。
造成代码感觉上冗余的多，不优美。
比如昨天写的CURD 项目设置属性为空，就相当难看的代码：
filters: {id: '',userName: '',password: '',nickName: '',role: '',status: '',type: '',},loading: false,dataForm: {//编辑界面数据id: '',userName: '',password: '',nickName: '',role: '',status: '',type: '',createTime: '',updateTime: '',},感觉上肯定有啥高级的用法，能将属性的默认值设置空啥的。
或者使用啥foreach的函数。
https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
拼接字符串：
let tmpDataForm = this.dataForm //赋值变量Object.keys(tmpDataForm).forEach(function(key){data += "&"+key+"=" + tmpDataForm[key]})
进行filter查询：
let query = ""let tmpFilters = this.filters //赋值变量Object.keys(tmpFilters).forEach(function(key){query += "&"+key+"=" + tmpFilters[key]})3，代码优化
昨天的curd优化：
https://blog.csdn.net/freewebsys/article/details/81112630
<template><section><!--工具条--><el-col :span="24" class="toolbar" style="padding-bottom: 0px;"><el-form :inline="true" :model="filters"><el-form-item><el-button type="primary" @click="editFunc">新建</el-button></el-form-item><el-form-item><el-input v-model="filters.id" placeholder="id"></el-input></el-form-item><el-form-item><el-input v-model="filters.userName" placeholder="用户名"></el-input></el-form-item><el-form-item><el-input v-model="filters.password" placeholder="密码"></el-input></el-form-item><el-form-item><el-input v-model="filters.nickName" placeholder="昵称"></el-input></el-form-item><el-form-item><el-input v-model="filters.role" placeholder="角色"></el-input></el-form-item><el-form-item><el-input v-model="filters.status" placeholder="状态"></el-input></el-form-item><el-form-item><el-input v-model="filters.type" placeholder="类型"></el-input></el-form-item><el-form-item><el-button type="primary" v-on:click="listFunc">查询</el-button></el-form-item></el-form></el-col><!--列表--><template><el-table :data="dataList" v-loading="loading" style="width: 100%;"><el-table-column prop="id" label="id"/><el-table-column prop="userName" label="用户名"/><el-table-column prop="password" label="密码"/><el-table-column prop="nickName" label="昵称"/><el-table-column prop="role" label="角色"/><el-table-column prop="status" label="状态"/><el-table-column prop="type" label="类型"/><el-table-column prop="createTime" label="创建时间"/><el-table-column prop="updateTime" label="更新时间"/><el-table-column label="操作" width="150"><template slot-scope="scope"><el-button-group><el-button type="primary" size="mini" @click="editFunc(scope.$index, scope.row)">编辑</el-button><el-button type="danger" size="mini" @click="deleteFunc(scope.$index, scope.row)">删除</el-button></el-button-group></template></el-table-column></el-table></template><el-col style="text-align:right;padding-top: 30px;"><el-pagination @current-change="pageChangeFunc" background="" layout="prev, pager, next" :total="totalCount"></el-pagination></el-col><!--编辑弹出页面--><el-dialog title="用户编辑" :visible.sync="dialogVisible"><el-input v-model="dataForm.id" placeholder="id" type="hidden"/><el-form label-width="100px" :rules="dataFormRules" ref="dataForm"><el-form-item label="用户名" prop="userName"><el-input/></el-form-item><el-form-item label="密码" prop="password"><el-input/></el-form-item><el-form-item label="昵称" prop="nickName"><el-input v-model="dataForm.nickName"/></el-form-item><el-form-item label="角色" prop="role"><el-input v-model="dataForm.role"/></el-form-item><el-form-item label="状态" prop="status"><el-input v-model="dataForm.status"/></el-form-item><el-form-item label="类型" prop="type"><el-input v-model="dataForm.type"/></el-form-item></el-form><span slot="footer" class="dialog-footer"><el-button @click="dialogVisible = false">取 消</el-button><el-button type="primary" @click="saveFunc">确 定</el-button></span></el-dialog></section>
</template><script>
export default {data() {return {filters: {id: '', userName: '', password: '', nickName: '', role: '', status: '', type: '',},loading: false,dataForm: {//编辑界面数据id: '', userName: '', password: '', nickName: '', role: '', status: '', type: '', createTime: '', updateTime: '',},dataFormRules: {//编辑界面校验规则userName: [{required: true, message: '请输入用户名', trigger: 'blur' } ],password: [{required: true, message: '请输入密码', trigger: 'blur' } ],nickName: [{required: true, message: '请输入昵称', trigger: 'blur' } ],role: [{required: true, message: '请输入角色', trigger: 'blur' } ],status: [{required: true, message: '请输入状态', trigger: 'blur' } ],type: [{required: true, message: '请输入类型', trigger: 'blur' } ],},dialogVisible: false,dataList: [], //列表数据totalCount: 0,currentPage: 1}},methods: {editFunc: function(index, row) {//新建&编辑if (row == undefined) {let tmpDataForm = this.dataForm //赋值变量，修改tmpDataForm即可Object.keys(tmpDataForm).forEach(function(key){tmpDataForm[key] = ''})this.dialogVisible = true} else {this.$axios.get('/userInfo/get?id=' + row.id).then(resp => {//数据直接赋值this.dataForm = resp.data.data}).finally(() => {this.loading = falsethis.dialogVisible = true})}},saveFunc: function() {this.$refs['dataForm'].validate((valid) => {if (!valid) { return false }let data = ""let tmpDataForm = this.dataForm //赋值变量Object.keys(tmpDataForm).forEach(function(key){data += "&"+key+"=" + tmpDataForm[key]})this.$axios.post('/userInfo/save?' + data).finally(() => {this.dialogVisible = falsethis.listFunc()})})},deleteFunc: function(index, row) {this.$confirm('确认删除该记录吗?', '提示', {type: 'warning'}).then(() => {this.$axios.delete('/userInfo/delete?id=' + row.id).finally(() => {this.listFunc()})})},listFunc: function() {this.loading = truelet query = ""let tmpFilters = this.filters //赋值变量Object.keys(tmpFilters).forEach(function(key){query += "&"+key+"=" + tmpFilters[key]})this.$axios.get('/userInfo/list?page=' + this.currentPage + query).then(resp => {this.dataList = resp.data.datathis.totalCount = resp.data.totalCount}).finally(() => {this.loading = false})},pageChangeFunc: function(idx) {this.currentPage = idxthis.listFunc()}},created: function() {this.listFunc()}};
</script>
4，总结
js代码中出现大量的 set 代码其实是冗余的本来就是动态语言，不能像java那样去写：this.xxx = xxx 这样不优雅。
要用 forEach去写：
let tmpDataForm = this.dataForm //赋值变量，修改tmpDataForm即可Object.keys(tmpDataForm).forEach(function(key){tmpDataForm[key] = ''})这个要是大表单数据，十几个 也没有啥意义。
本文的原文连接是:
https://blog.csdn.net/freewebsys/article/details/81153733
博主地址是：http://blog.csdn.net/freewebsys
