Knockout.js从observableArray拉元素返回未定义

Question

Here is the code I am using in a larger function:

this.categoriesToSearch = ko.observableArray(["Food"]);// Initial selection
console.log(this.categoriesToSearch[0]);

Running this returns undefined . Knockout.js documentation says observableArrays are supposed to be read that way. Is there a better way to read observableArrays?

Answer 1

自从发布后马上想到答案，回答了我自己的问题：observableArrays是函数，因此提取项的正确方法是：

this.categoriesToSearch()[0]

Answer 2

Try this.categoriesToSearch()[0]

KO documentation says you have to handle observable array like a function call.