Programmer Think

call methodThe call() method calls a function with a specified this value (this points to the execution environment context) and one or more parameters given separately.grammarfun.call(thisArg[, arg1[, arg2[, ...]]])fun: function called.thisArg: required. The value of this specified by the function runtime (this points to the execution environm ...

1 Set set Set: a data structure similar to an array without duplicate values. It is mainly used for array de duplication and string de duplication. 1.1 operation method methodmeaningadd()Add a value and return the Set structure itselfdelete()Delete value, and return a boolean indicating whether the deletion is successfulhas()Judge whethe ...

How to achieve dynamic effects with only HTML and CSS? As for animation, it is well known that JavaScript and Flash are the mainstream of animation. Although the transition of CSS3 is not as professional as the first two, it is precisely because CSS3 processes less data that its transition is smoother than dove. Today let's look at: 1, Trans ...

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 ...

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 ...

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: ' ...

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 ...

elaborate In actual use, useContext and useReducer can achieve effects similar to Redux, and for some simple personal projects, the following scheme can be used to replace Redux, which is simpler than redux. Because useContext and useReducer have been studied in my previous articles, we focus on how to simulate the effect of Redux. If you ...

Project effect display:  1. Project overview 1.1 overview of basic business of e-commerce project Generally, the business services used by customers include: PC, applet, mobile web and mobile app. Business services used by administrators: PC background management end; Functions of PC background management end Manage user account (l ...

Nowadays, both toB and toC companies are inseparable from doing content marketing in wechat ecology. The traditional WeChat official account and service number are the most basic WeChat marketing platform, while the more advanced WeChat marketing strategy should enrich the content of audio, video, live broadcast, and even achieve direct realiza ...