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.$axios.get('/userInfo/get?id=' + row.id)
.then(resp => {//数据直接赋值
this.dataForm = resp.data.data
}).finally(() => {
this.loading = false
this.dialogVisible = true
})
}},
saveFunc: function() {
this.$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.$axios.post('/userInfo/save?' + data)
.finally(() => {
this.dialogVisible = false
this.listFunc()
})
})
},
deleteFunc: function(index, row) {
this.$confirm('确认删除该记录吗?', '提示', {
type: 'warning'
}).then(() => {
this.$axios.delete('/userInfo/delete?id=' + row.id)
.finally(() => {
this.listFunc()
})
})
},
listFunc: function() {
this.loading = true
let query = ""
let tmpFilters = this.filters //赋值变量
Object.keys(tmpFilters).forEach(function(key){
query += "&"+key+"=" + tmpFilters[key]
})
this.$axios.get('/userInfo/list?page=' + this.currentPage + query)
.then(resp => {
this.dataList = resp.data.data
this.totalCount = resp.data.totalCount
}).finally(() => {
this.loading = false
})
},
pageChangeFunc: function(idx) {
this.currentPage = idx
this.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