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true和false怎么不一样啊？

0

1

数据类型函数

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

var a=1;
undefined
true&&(a=2);
2
true||(a=3);
true
var b=5;
undefined
false&&(b=6);
false
false||(b=7);
7

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动态添加标签的时候，只添加文字，但是，不影响样式处理办法。

0

1

节点操作

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

var entranceNum = document.getElementById('entrance');
var slideNum = document.getElementById('slide');

slideNum.onchange = function () {
    entranceNum.value = slideNum.value;
};

entranceNum.onchange = function () {
    if (entranceNum.value >3 && entranceNum.value<19){
        entranceNum.value = slideNum.value;
    }else{
        alert('请输入正确的人数')
    }
};
var left = document.getElementById('left');
left.onclick = function () {
    if (entranceNum.value > 4){
        entranceNum.value--;
        slideNum.value = entranceNum.value;
    }  else {
    }
};
var right = document.getElementById('right');
right.onclick = function () {
    if (entranceNum.value < 18){
        entranceNum.value++;
        slideNum.value = entranceNum.value;
    }  else {
        alert('人太多了');
    }
};
document.getElementsByClassName('go')[0].addEventListener('click',function () {
    if (document.getElementsByClassName('add-flat').length<2){
        alert('请分配好人数')
    }else{
        window.location.href='./JS3.html'
    }
});




setting.onclick = function () {
    var entrance = [];
      var str ="";
    entrance.length = entranceNum.value;
    var slayer = Math.floor(entranceNum.value/3);
var q=[];
while(q.length<slayer){
    var stochastic= Math.floor(Math.random()*entranceNum.value);
    if(q.indexOf(stochastic)<0){
        q.push(stochastic);
    }
    // console.log(out);
}
 for (i =0; i<q.length; i++){
     entrance[q[i]] ='<li class="add-slayer">' + '杀手' + '</li>';
     // console.log(i);
     // console.log(out)
     // console.log(entrance)
}
for (i=0; i<entrance.length; i++){
    if(entrance[i] !=='<li class="add-slayer">' + '杀手' + '</li>'){
        entrance[i] ='<li class="add-flat">' + '平民' + '</li>';
    }
    // console.log(entrance.length)
    // console.log(i)
}

console.log(entrance);
for (var i=0;i<entrance.length;i++){
     str +=entrance[i];

}



 document.getElementById('info').innerHTML = str;
sessionStorage.setItem('dog',JSON.stringify(entrance))
};
console.log(entrance);

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angular服务注入的时候这里为什么没获取到数据？

0

1

angular基础

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

import { Component, OnInit } from '@angular/core';
import { Hero } from '../hero';
import { HeroService } from '../hero.service';

@Component({
  selector: 'app-heroes',
  templateUrl: './heroes.component.html',
  styleUrls: ['./heroes.component.scss']
})
export class HeroesComponent implements OnInit {

  constructor(private heroService: HeroService) {

  }
  heroes: Hero[];
  selectHero: Hero;
  getHeroes(): void {
    this.heroService.getHeroes().subscribe(heroes => heroes = heroes);
  }
  onSelect(hero: Hero) {
    this.selectHero = hero;
  }
  ngOnInit() {
    this.getHeroes();
  }

}

import { Injectable } from '@angular/core';
import { Hero } from "./hero";
import { HEROES } from "./mock-heroes";
import { MessageService } from "./message.service";
import { Observable, of } from "rxjs";
@Injectable({
  providedIn: 'root'
})
export class HeroService {

  constructor(private messageService: MessageService) { }
  getHeroes(): Observable<Hero[]> {
    this.messageService.add('HeroService: fetched heroes');
    return of(HEROES);
  }

}

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后台管理的角色新增/编辑权限多选怎么实现？

0

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

怎么实现？

该问题已被官方收录

使用微信内H5页面唤醒微信支付的流程是什么样的？

0

1

微信

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

function onBridgeReady(){
   WeixinJSBridge.invoke(
       'getBrandWCPayRequest', {
           "appId":"wx2421b1c4370ec43b",     //公众号名称，由商户传入     
           "timeStamp":"1395712654",         //时间戳，自1970年以来的秒数     
           "nonceStr":"e61463f8efa94090b1f366cccfbbb444", //随机串     
           "package":"prepay_id=u802345jgfjsdfgsdg888",     
           "signType":"MD5",         //微信签名方式：     
           "paySign":"70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信签名 
       },
       function(res){     
           if(res.err_msg == "get_brand_wcpay_request:ok" ) {}     // 使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回    ok，但并不保证它绝对可靠。 
       }
   ); 
}
if (typeof WeixinJSBridge == "undefined"){
   if( document.addEventListener ){
       document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
   }else if (document.attachEvent){
       document.attachEvent('WeixinJSBridgeReady', onBridgeReady); 
       document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
   }
}else{
   onBridgeReady();
}

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如何进行单页面之间的跳转？

2

1

angular基础

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

html
<div ui-view=""></div>
js
ar myApp = angular.module("myApp",['ui.router']);
myApp.config(function($stateProvider,$urlRouterProvider){

$urlRouterProvider.when("", "/login");

$stateProvider
       .state("login",{
url:"/login",
templateUrl: "html/login.html"
       })
.state("backstage",{
url:"/backstage",
templateUrl: "html/backstage.html"
       })
});

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怎样使用angularjs实现一个完整的分页？

0

1

分页

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

代码如图

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关于ng-router和ui-router

0

1

angular router

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

ng-router
<html>
    <head>
        <meta charset="utf-8">
        <title>AngularJS 路由实例 - 菜鸟教程</title>
    </head>
    <body ng-app='routingDemoApp'>
     
        <h2>AngularJS 路由应用</h2>
        <ul>
            <li><a href="#/">首页</a></li>
            <li><a href="#/computers">电脑</a></li>
            <li><a href="#/printers">打印机</a></li>
            <li><a href="#/blabla">其他</a></li>
        </ul>
         
        <div ng-view></div>
        <script src="http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"></script>
        <script src="http://apps.bdimg.com/libs/angular-route/1.3.13/angular-route.js"></script>
        <script>
            angular.module('routingDemoApp',['ngRoute'])
            .config(['$routeProvider', function($routeProvider){
                $routeProvider
                .when('/',{template:'这是首页页面'})
                .when('/computers',{template:'这是电脑分类页面'})
                .when('/printers',{template:'这是打印机页面'})
                .otherwise({redirectTo:'/'});
            }]);
        </script>
     
     
    </body>
</html>
关于ui-router
<ul>
   <li><a ui-sref="index">首页</a></li>
   <li><a ui-sref="fruit">水果</a></li>
   <li><a ui-sref="vegetable">蔬菜</a></li>
 </ul>
angular.module('myapp',['ui.router'])
.config(function($stateProvider,$urlRouterProvider){
    $urlRouterProvider.otherwise('/index');
    $stateProvider.state('fruit',{
       url:'/fruit',
       templateUrl:'fruit.html'
    })
    .state('vegetable',{
        url:'/vegetable',
        templateUrl:'vegetable.html'
    })
    .state('index',{
        url:'/index',
        template:'<h2>这是首页</h2>'
    });
});

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浏览器控制台发出警告

0

1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

<div class="login" ng-controller="loginctrl">
  <form name="loginForm">
    <p class="houtai">后台登录</p> <br>
    <!-- 用户名图标 -->
    <span class="glyphicon glyphicon-user name" aria-hidden="true"></span>
    <!-- 用户名输入框 -->
    <input type="text" ng-model="name" class="form-control" placeholder="请输入用户名" 
    required name="uname" ng-maxlength="16" ng-minlength="4" ng-pattern="/^\w/" size="30"><br>
    <!-- 密码图标 -->
    <span class="glyphicon glyphicon-lock word" aria-hidden="true"></span>
    <!-- 密码输入框 -->
    <input type="password" ng-model="pass" class="form-control" placeholder="请输入密码" required name="upass" ng-maxlength="18" ng-minlength="6">
    <!-- 错误信息提示框 -->
    <div class="error " ng-messages="loginForm.uname.$error" id="pro">
      <div ng-message="required">用户名不能为空</div>
      <div ng-message="minlength">用户名长度至少为4</div>
      <div ng-message="maxlength">用户名长度不能超过16</div>
      <div ng-message="pattern">用户名不符合要求</div>
      <div ng-model="info" >{{info}}</div>
    </div>
    <!-- 登录按钮 -->
    <button type="submit" ng-click="subclick()">登录</button>
  </form>
</div>


app.controller("loginctrl", function ($scope, $http, $state) {
  $scope.subclick = function () {
    $http({
      method: 'post',
      url: '/carrots-admin-ajax/a/login',
      //params属性将输入框的值以键值对的形式传给服务器
      params: {
        name: $scope.name,  
        pwd: $scope.pass,
      },
      //编码格式
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded'
      },
    }).then(function (xhr) {
      console.log(xhr.data);
      if (xhr.data.code === 0) {
        $state.go("dashboard");
      } else {
        $scope.info = xhr.data.message;
      }
    })
  }
})

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一个微信小程序的项目中是否只能统一头部是否自定义

0

1

小程序语言基础小程序界面构建

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 截图

class="cursor-pointer"> 代码

"navigationStyle":"custom" 跟 "navigationStyle": "default",
 "default",是默认的显示头部
如何可以每个页面都决定他的自定义

去第页

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