AngularJS API Referenceautoauto/serviceauto/service/$injectorauto/service/$providengng/directiveng/directive/ang/directive/formng/directive/inputng/directive/input[checkbox]ng/directive/input[date]ng/directive/input[dateTimeLocal]ng/directive/input[email]ng/directive/input[month]ng/directive/input[number]ng/directive/input[radio]ng/directive/input[text]ng/directive/input[time]ng/directive/input[url]ng/directive/input[week]ng/directive/ngAppng/directive/ngBindng/directive/ngBindHtmlng/directive/ngBindTemplateng/directive/ngBlurng/directive/ngChangeng/directive/ngCheckedng/directive/ngClassng/directive/ngClassEvenng/directive/ngClassOddng/directive/ngClickng/directive/ngCloakng/directive/ngControllerng/directive/ngCopyng/directive/ngCspng/directive/ngCutng/directive/ngDblclickng/directive/ngDisabledng/directive/ngFocusng/directive/ngFormng/directive/ngHideng/directive/ngHrefng/directive/ngIfng/directive/ngIncludeng/directive/ngInitng/directive/ngKeydownng/directive/ngKeypressng/directive/ngKeyupng/directive/ngListng/directive/ngModelng/directive/ngModelOptionsng/directive/ngMousedownng/directive/ngMouseenterng/directive/ngMouseleaveng/directive/ngMousemoveng/directive/ngMouseoverng/directive/ngMouseupng/directive/ngNonBindableng/directive/ngOpenng/directive/ngPasteng/directive/ngPluralizeng/directive/ngReadonlyng/directive/ngRepeatng/directive/ngSelectedng/directive/ngShowng/directive/ngSrcng/directive/ngSrcsetng/directive/ngStyleng/directive/ngSubmitng/directive/ngSwitchng/directive/ngTranscludeng/directive/ngValueng/directive/scriptng/directive/selectng/directive/textareang/filterng/filter/currencyng/filter/dateng/filter/filterng/filter/jsonng/filter/limitTong/filter/lowercaseng/filter/numberng/filter/orderByng/filter/uppercaseng/functionng/function/angular.bindng/function/angular.bootstrapng/function/angular.copyng/function/angular.elementng/function/angular.equalsng/function/angular.extendng/function/angular.forEachng/function/angular.fromJsonng/function/angular.identityng/function/angular.injectorng/function/angular.isArrayng/function/angular.isDateng/function/angular.isDefinedng/function/angular.isElementng/function/angular.isFunctionng/function/angular.isNumberng/function/angular.isObjectng/function/angular.isStringng/function/angular.isUndefinedng/function/angular.lowercaseng/function/angular.moduleng/function/angular.noopng/function/angular.toJsonng/function/angular.uppercaseng/objectng/object/angular.versionng/providerng/provider/$animateProviderng/provider/$compileProviderng/provider/$controllerProviderng/provider/$filterProviderng/provider/$httpProviderng/provider/$interpolateProviderng/provider/$locationProviderng/provider/$logProviderng/provider/$parseProviderng/provider/$rootScopeProviderng/provider/$sceDelegateProviderng/provider/$sceProviderng/serviceng/service/$anchorScrollng/service/$animateng/service/$cacheFactoryng/service/$compileng/service/$controllerng/service/$documentng/service/$exceptionHandlerng/service/$filterng/service/$httpng/service/$httpBackendng/service/$interpolateng/service/$intervalng/service/$localeng/service/$locationng/service/$logng/service/$parseng/service/$qng/service/$rootElementng/service/$rootScopeng/service/$sceng/service/$sceDelegateng/service/$templateCacheng/service/$timeoutng/service/$windowng/typeng/type/$cacheFactory.Cacheng/type/$compile.directive.Attributesng/type/$rootScope.Scopeng/type/angular.Moduleng/type/form.FormControllerng/type/ngModel.NgModelControllerngAnimatengAnimate/providerngAnimate/provider/$animateProviderngAnimate/servicengAnimate/service/$animatengCookiesngCookies/servicengCookies/service/$cookiesngCookies/service/$cookieStorengMessagesngMessages/directivengMessages/directive/ngMessagengMessages/directive/ngMessagesngMockngMock/functionngMock/function/angular.mock.dumpngMock/function/angular.mock.injectngMock/function/angular.mock.modulengMock/objectngMock/object/angular.mockngMock/providerngMock/provider/$exceptionHandlerProviderngMock/servicengMock/service/$exceptionHandlerngMock/service/$httpBackendngMock/service/$intervalngMock/service/$logngMock/service/$timeoutngMock/typengMock/type/angular.mock.TzDatengMockE2EngMockE2E/servicengMockE2E/service/$httpBackendngResourcengResource/servicengResource/service/$resourcengRoutengRoute/directivengRoute/directive/ngViewngRoute/providerngRoute/provider/$routeProviderngRoute/servicengRoute/service/$routengRoute/service/$routeParamsngSanitizengSanitize/filterngSanitize/filter/linkyngSanitize/servicengSanitize/service/$sanitizengTouchngTouch/directivengTouch/directive/ngClickngTouch/directive/ngSwipeLeftngTouch/directive/ngSwipeRightngTouch/servicengTouch/service/$swipe
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AngularJS: API: ng/directive/ngChecked
ngChecked
- - directive in module ng
在HTML规范中不要求浏览器必须结出像checked这种布尔型属性的值（例如为true时有值，为false时无值）。如何我们在这种属性上使用Angular表达式，则当值为false时会被浏览器把属性删除。ngChecked指令解决了 checked 属性存在的这个问题。这个指令不会被浏览器删除，并且可以进行数据绑定。
指令信息
- 这个指令执行优先级为100.
用法
- 作为属性使用:
<INPUT ng-checked=""> ... </INPUT>
参数
| 参数 | 类型 | 详述 |
|---|---|---|
| ngChecked | expression | 如果表达式为真，则在元素上放置"checked"属性。 |
示例
index.html
Check me to check both: <input type="checkbox" ng-model="master"><br/><input id="checkSlave" type="checkbox" ng-checked="master">it('should check both checkBoxes', Function() {
expect(element(by.id('checkSlave')).getAttribute('checked')).toBeFalsy();
element(by.model('master')).click();
expect(element(by.id('checkSlave')).getAttribute('checked')).toBeTruthy();});