What is call back function: Simply put: A callback is a function that is to be executed after another function has finished executing — hence the name ‘call back’. More complexly put: In JavaScript, functions are objects. Because of this, functions can take functions as arguments, and can be returned by other functions. Functions that …
What does “let that = this” mean in Javascript/Typescript?
For example, let person = { name:"bill", speak:function(){ console.log("hi i am "+this.name) } } Functions has something called a context. A context is the object the function is being called on. if you were to do person.speak(), it will be called on the object that was defined. The variable person is the context. So when …
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What is AJAX
What is AJAX AJAX is not a programming language. AJAX is a technique for accessing web servers from a web page. AJAX stands for Asynchronous JavaScript And XML. Here is an example of AJAX: How AJAX works
How to build navigator of video website in Wechat mini program
Here are some bilibili interface: 首页导航：http://mock-api.com/mnEe4VnJ.mock/navList 轮播图：http://mock-api.com/mnEe4VnJ.mock/swiperList 视频列表：http://mock-api.com/mnEe4VnJ.mock/videoList 视频详情：http://mock-api.com/mnEe4VnJ.mock/videoDetail 推荐视频：http://mock-api.com/mnEe4VnJ.mock/otherList 评论列表：http://mock-api.com/mnEe4VnJ.mock/commentList We can use postman to test the first one (navList): And good job this interface works. Then we should use code in index.js: data: { // 首页导航数据 navList:[] }, If the url we use is not allowed, we need to check this from setting …
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The composition of Wechat mini program
This is my very first time touching Wechat mini program, I have created my first demo program on official develop tool program and open it with my editor, let’s have a look at the structure of its files. The structure of my program demo: So far, we can notice that here are four types of …