AngularJS学习--- AngularJS中数据双向绑定(two-way data-binding) orderBy step4
2020-12-13 01:53
标签：des style blog class code java app/index.html app/controllers.js 按字母排序: 按时间排序: 很明显,相较于step-3,step-4新增加了排序功能 首先,添加了 其次,在filter中添加了orderBy: {{phone.snippet}} 所以,根据angularjs的思想,一是model改变(可能是用户手动选择下拉框导致的),那么根据数据绑定原则(data-binding),view也将适时进行改变. orderBy api:https://docs.angularjs.org/api/ng/filter/orderBy 上面的例子是在HTML中用的,默认string类型的数据是按照字母表中数据排序的,而number数字类型的数据是按照数字大小进行排序的. 如果想要倒序,那么可以在上面的option value=‘-name‘,加上一个‘-‘即可. 这里执行的是端到端的测试,测试代码如下: angular-phonecat/test/e2e/scenarios.js AngularJS学习--- AngularJS中数据双向绑定(two-way data-binding) orderBy
step4,搜素材,soscw.com AngularJS学习--- AngularJS中数据双向绑定(two-way data-binding) orderBy
step4 标签：des style blog class code java 原文地址：http://www.cnblogs.com/amosli/p/3712926.html1.切换工作目录
git checkout step-4 #切换分支,切换到第4步
npm start #启动项目
2.代码
Search: input ng-model="query">
Sort by:
select ng-model="orderProp">
option value="name">Alphabeticaloption>
option value="age">Newestoption>
select>
ul class="phones">
li ng-repeat="phone in phones | filter:query | orderBy:orderProp">
{{phone.name}}
p>{{phone.snippet}}p>
li>
ul>
var phonecatApp = angular.module(‘phonecatApp‘, []);
phonecatApp.controller(‘PhoneListCtrl‘, function($scope) {
$scope.phones = [
{‘name‘: ‘Nexus S‘,
‘snippet‘: ‘Fast just got faster with Nexus S.‘,
‘age‘: 1},
{‘name‘: ‘Motorola XOOM? with Wi-Fi‘,
‘snippet‘: ‘The Next, Next Generation tablet.‘,
‘age‘: 2},
{‘name‘: ‘MOTOROLA XOOM?‘,
‘snippet‘: ‘The Next, Next Generation tablet.‘,
‘age‘: 3}
];
$scope.orderProp = ‘age‘;
});
3.效果
4.原理说明
标签:
orderBy Usage(用法)
In HTML Template Binding(在HTML中的用法)
{{ orderBy_expression | orderBy : expression : reverse}}In JavaScript(在JS中的用法)
$filter(‘orderBy‘)(array, expression, reverse)5.测试
amosli@amosli-pc:~/develop/angular-phonecat$ npm run protractor
> angular-phonecat@0.0.0 preprotractor /home/amosli/develop/angular-phonecat
> npm run update-webdriver
> angular-phonecat@0.0.0 preupdate-webdriver /home/amosli/develop/angular-phonecat
> npm install
> angular-phonecat@0.0.0 postinstall /home/amosli/develop/angular-phonecat
> bower install
> angular-phonecat@0.0.0 update-webdriver /home/amosli/develop/angular-phonecat
> webdriver-manager update
selenium standalone is up to date.
chromedriver is up to date.
> angular-phonecat@0.0.0 protractor /home/amosli/develop/angular-phonecat
> protractor test/protractor-conf.js
------------------------------------
PID: 5265 (capability: chrome #1)
------------------------------------
Using ChromeDriver directly...
..
Finished in 5.033 seconds
2 tests, 5 assertions, 0 failures
amosli@amosli-pc:~/develop/angular-phonecat/test/e2e$ cat scenarios.js
‘use strict‘;
/* http://docs.angularjs.org/guide/dev_guide.e2e-testing */
describe(‘PhoneCat App‘, function() {
describe(‘Phone list view‘, function() {
beforeEach(function() {
browser.get(‘app/index.html‘);
});
it(‘should filter the phone list as user types into the search box‘, function() {
var phoneList = element.all(by.repeater(‘phone in phones‘));
var query = element(by.model(‘query‘));
expect(phoneList.count()).toBe(3);
query.sendKeys(‘nexus‘);
expect(phoneList.count()).toBe(1);
query.clear();
query.sendKeys(‘motorola‘);
expect(phoneList.count()).toBe(2);
});
it(‘should be possible to control phone order via the drop down select box‘, function() {
var phoneNameColumn = element.all(by.repeater(‘phone in phones‘).column(‘{{phone.name}}‘));
var query = element(by.model(‘query‘));
function getNames() {
return phoneNameColumn.map(function(elm) {
return elm.getText();
});
}
query.sendKeys(‘tablet‘); //let‘s narrow the dataset to make the test assertions shorter
expect(getNames()).toEqual([
"Motorola XOOM\u2122 with Wi-Fi",
"MOTOROLA XOOM\u2122"
]);
element(by.model(‘orderProp‘)).findElement(by.css(‘option[value="name"]‘)).click();
expect(getNames()).toEqual([
"MOTOROLA XOOM\u2122",
"Motorola XOOM\u2122 with Wi-Fi"
]);
});
});
});
下一篇：JAVA面试中需要准备的点
文章标题：AngularJS学习--- AngularJS中数据双向绑定(two-way data-binding) orderBy step4
文章链接：http://soscw.com/essay/24399.html