Programmer Think

Chapter 1 implementation of indexCateList 1, Implementation of background data Home page paging list data to achieve simple cors processing // Home navigation page data let indexCateList = require('./datas/indexCateList.json') router.get('/getindexCateList', async (ctx, next) => { // The generated H5 application has cross domain problems ...

vue event handler 1.1 @click="handleClick" In the event handling method without parentheses, vue will automatically pass the event object. You can get the event object in the event handling function, but you cannot pass custom parameters <div id="box"> {{count}} <br> <button @click="handleClick">event proces ...

All Tips are my notes in OneNote. The copied ones are pictures. I'm too lazy to turn to text Chapter 5: React routing 1, Relevant understanding 1.1 understanding of Spa single page web application (SPA)The whole application has only one complete pageClicking the link in the page will not refresh the page, but only make a partial update of t ...

This paper introduces some common uses of writing regular expressions in JavaScript. 1. match() match() is used with a string to check the match between the string and the regular expression ， regex ， with the regular expression as an argument. grammar: str.match(regex); Method returns three possible values: If the regular expression ...

Map and View of core concepts Map is a container for managing layer and basemap references. View is used to display map layers and handle user interaction, pop-up windows, widgets and map locations. Generally speaking, it can be understood that map is responsible for the management of map data, while view is responsible for the display of map ...

Using Vue JS build VS Code extension Visual Studio (VS) Code is one of the favorite code editors used by developers in their daily tasks. It is built with scalability in mind. To some extent, most of the core functions of VS Code are built as extensions. You can view the VS Code extension repository( https://github.com/microsoft/vscode/tree/ ...

props configuration item Create a student component (Student.vue) <template> <div> <h2>Student information:{{name}}</h2> <h2>Student gender:{{sex}}</h2> <h2>Student age:{{age}}</h2> </div> </template> <script> export default{ name: ' ...

Front end foundation js 2.1 let const var correlation Reference answer: var -- ES5 variable declaration method When the variable is not assigned, the variable is undefined (also undefined when the declared variable is used)Scope - the scope of var is method scope; As long as it is defined in the method, the code after defining variables in ...

Wechat applet: wx:key details 1, Code demonstration Source code without wk: key: //<!-- pages/mypage/mypage. Wxml -- > (wxml page structure file) <switch wx:for = "{{numberArray}}" style='display : block;'>{{item}}</switch> // pages/mypage/mypage.js (js script file) Page({ /** * Initial data of the page */ dat ...

1.length() method Gets the length of the array let a = [1,2,3,4,5,6]; console.log(a.length); // 6 starts with 1 2.join() method, toString() method and toLocaleString() method Array to string let a = [1, 2, 3, 4, 5, 6]; console.log(a.join()); //1,2,3,4,5,6 console.log(a.join("?")); //1?2?3?4?5?6 3.reverse() method Invert the order of arr ...