Programmer Think

Let and const are newly added commands in ES6 to declare variables. These two commands are different from var in ES5, and let and const are slightly different The difference between var and let/const Block level scopeThere is no variable promotionTemporary dead zoneNon repeatable declarationThe global variables declared by let and const ...

first day 01 first acquaintance with JavaScript 1. Brief JavaScript 1.5 DOM (document object model): standard programming interface BOM (browser object model) Build a my JS, write alert('didi ') in the file; single quotes 2. JS notes Single line comment: ctrl+/ Multiline comment: ctrl+shift+/ 3. JS input / output statement Aler ...

JavaScript object oriented 1-1 introduction to object-oriented programming 1-1.1 two programming ideas: Process orientedobject-oriented 1-2 POP (process oriented programming) Process oriented is to analyze the steps needed to solve the problem, and then use functions to realize these steps step by step. When using, just call them o ...

preface Development of official account H5 uploading pictures and compressing method based on uni-app thinking Upload pictures We should be clear that there are three ways to display pictures: file (file stream), bolb (local stream) and Base64 (binary stream) file The File interface provides information about the File and allows JavaS ...

React high level guidance: Context context & component combination & render props preface Today is also to explain the advanced application skills of React. The content may involve the use of some special API s, or the special usage of React components and props. It can be regarded as a design pattern, an exclusive design pattern ...

The cause of the incident is as follows: I have a need to add a dark mode for my blog. I need to save the user's choices in loadstorage, but to publish the content to github Pages, I need to compile it in the node environment. There will be objects such as window and localstorage that cannot be found. If I want to solve this problem, I need to ...

Author: SARANSH KATARIA Translator: front end Xiaozhi Source: wisdomgeek There are dreams and dry goods. Wechat search [Daqian world] pays attention to this dish washing wisdom who is still washing dishes in the early morning. This article GitHub https://github.com/qq449245884/xiaozhi It has been included. There are complete test sites, ...

1, Cascading style sheets Introduction Cascading style sheets are used to represent HTML(Standard universal markup language An application of) or XML (a subset of the standard common markup language) and other file style computer languages. CSS can not only modify the web page statically, but also format the elements of the web page dynamical ...

Then continue to write the last article.5. Find the largest number in multiple arraysInput: largestOfFour([[13, 27, 18, 26], [4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]])Output: [27, 5, 39, 1001]Solution:function largestOfFour(arr) { let temp = []; for(let i =0;i<arr.length;i++) { temp.push(Math.max(...arr[i])); } return ...

XSS Cross site scripting (XSS) is a kind of security vulnerability attack of website application and a kind of code injection. It allows malicious users to inject code into the web page, which will affect other users when they watch the web page. Such attacks usually involve HTML and client scripting language Attack mode Attack the website b ...