Angularjs-Why two-way data binding

Source: Internet
Author: User

The most typical scenario should belong to the form

Scenarios like forms and tables, presentation and submission are generally present at the same time.

Typically, one-way data binding solves business needs, such as the content of a database is bound to a page in HTML.

However, if you need to design the submission function, two-way data binding will be very convenient.

Bidirectional data binding refers to the model that changes when a text box (or other bound label, control) changes

In that case. The changed model can be submitted immediately without the need for DOM and value operations through tedious jquery

<!DOCTYPE HTML><HTMLNg-app= "Userinfomodule"><Head>    <MetaCharSet= "Utf-8">    <Linkhref= "Https://cdn.bootcss.com/bootstrap/3.6.6/css/bootstrap.min.css"rel= "stylesheet"></Head><Body>    <Divclass= "Panel Panel-primary">        <Divclass= "Panel-heading">            <Divclass= "Panel-title">Bidirectional data binding</Div>        </Div>        <Divclass= "Panel-body">            <Divclass= "Row">                <Divclass= "Col-md-12">                    <formclass= "Form-horizontal"role= "form"Ng-controller= "Userinfoctrl">                        <Divclass= "Form-group">                            <labelclass= "Col-md-2 Control-label">Mailbox:</label>                            <Divclass= "Col-md-10">                                <inputtype= "Email"class= "Form-control"placeholder= "126 Mailbox Recommended"Ng-model= "Userinfo.email">                            </Div>                        </Div>                        <Divclass= "Form-group">                            <labelclass= "Col-md-2 Control-label">Password:</label>                            <Divclass= "Col-md-10">                                <inputtype= "Password"class= "Form-control"placeholder= "Only numbers, letters, underscores"Ng-model= "Userinfo.pwd">                            </Div>                        </Div>                        <Divclass= "Form-group">                            <Divclass= "Col-md-offset-2 col-md-10">                                <Divclass= "checkbox">                                    <label>                                        <inputtype= "checkbox"Ng-model= "Userinfo.autologin">Automatic Login</label>                                </Div>                            </Div>                        </Div>                        <Divclass= "Form-group">                            <Divclass= "Col-md-offset-2 col-md-10">                                <Buttonclass= "Btn Btn-default"Ng-click= "Getformdata ()">Get the value of a form form</Button>                                <Buttonclass= "Btn Btn-default"Ng-click= "Setformdata ()">Set the value of a form form</Button>                            </Div>                        </Div>                    </form>                </Div>            </Div>        </Div>    </Div>    <Scriptsrc= "Https://cdn.bootcss.com/angular.js/1.5.0/angular.min.js"></Script>    <Scripttype= "Text/javascript">    varUserinfomodule=Angular.module ('Userinfomodule', []); Userinfomodule.controller ('Userinfoctrl', ["$scope", function($scope) {$scope. UserInfo={email:"[email protected]", pwd:"123456", Autologin:true} $scope. Getformdata= function() {Console.log ($scope. UserInfo); } $scope. Setformdata= function() {$scope. UserInfo={email:"[email protected]", pwd:"123456123456123456123456", Autologin:false            }        }    }])    </Script></Body></HTML>

Angularjs-Why two-way data binding

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