Question

我是打字稿的新手，并希望将以下Knockout + js转换为knockout + typescript。 Knockout + js正在运行，但是我仍然无法使用typescript ....

查看：

<select data-bind="options: choices, value: selectedChoice"></select>

型号：

var MyModel = {
    choices: ["Blue", "White", "Black", "Yellow"],
    selectedChoice: ko.observable("Yellow") 
};

MyModel.selectedChoice.subscribe(function(newValue) {
   alert("the new value is " + newValue); 
});


ko.applyBindings(MyModel);

打字稿：

import BaseVM = require("./BaseVM");

class MyModel extends BaseVM {
  choices = ko.observableArray(["one", "two", "three"]);

  //Here selectedChoice subscribe in typescript...

}

export = MyModel;

Answer 1

在类中的typescript中，您需要将订阅代码放在构造函数中。然后你就可以使用＆＃34;这个＆＃34;访问您要订阅的媒体资源。

class MyModel extends BaseVM {
    choices = ko.observableArray(["one", "two", "three"]);
    selectedChoice = ko.observable("Yellow");

    constructor() {
        this.selectedChoice.subscribe(function (newValue) {
            alert("the new value is " + newValue);
        });
    }
}

选择框模型与打字稿和淘汰赛

1 个答案: