Barcode. Js small program to generate bar codes
Create barcode_util.js file barcode.js file Please look at the WXML file to create a Canvas tag,
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Tag: javascript
React Context: How to bypass the Provider and modify it
February 6, 2024
by Thomas Smith
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Context is a feature provided by React to transfer data between components at any level. You've probably used context before, but you don't know how...
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Based on EChart to achieve drag line chart
February 6, 2024
by Nayantara Deshpande
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Recently I met a requirement to make a visual chart page, which has a line chart. It can be said that the implementation of this...
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Angular tutorial
February 6, 2024
by Billy Turner
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Angular5 tutorial comprehensively systematically explained the latest version of the angular5, content not only covers the component template syntax, instructions and use, form, development and...
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【Node.js】 Green plum cooking wine, talk about Zlib compression
February 6, 2024
by 李淑娟
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Recently I looked at the API of Zlib compression and found it strange to understand or use, so I chose some APIS that seemed interesting...
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Console.log () you don’t know
February 6, 2024
by Brooke Wright
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Make writing a habit together! This is my first day to participate in the "Gold Digging Day New Plan · April More text challenge", click...
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Summary of the way web file upload is implemented
February 6, 2024
by Stewart Pugh
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File uploading is a common requirement for Web development. Uploading files requires a file input box. If you add a multiple attribute to the file...
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How did I “hack” a paid audio source for a software application
February 6, 2024
by Leanne Russell
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I've been using a software called BetterSleep, which has excellent resources, mixed playback and excellent performance. It supports the Web version and I was particularly...
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Community open source Web Excel comparative analysis
February 6, 2024
by 白俊宏
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Make writing a habit together! This is the NTH day of my participation in the "Gold Digging Day New Plan · April More text Challenge"....
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Rollup + gulp makes a wheel, not to mention smells good
February 6, 2024
by 蘇佳玲
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I got into the front end in '16, and gulp and rollup in' 17. Because webPack was so strong at the time, I never really...
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Thinking — the console. The log (` ${1 + 2} `). = = = the console log ` ${1 + 2} `?
February 6, 2024
by Billy Wright-Brown
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Template strings are one of the important new syntactic features in ES6. They can be used as regular strings, to define multi-line strings, or to...
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How does useEffect Hook work
February 6, 2024
by Jessica Cameron
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Everyone said there was no project on your resume, so I helped you find a project and gave you a "build tutorial". Imagine this: You...
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Small program – the introduction of Echart chart draw round pie chart
February 6, 2024
by Debra Sampson
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There are a lot of charts related content, if you are related to the chart problem, welcome to study together, leave a message, discuss..
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A serious open source repository for front-end learning (Stage 9)
February 6, 2024
by Miss Elaine Powell
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This is my first day to participate in the "Gold Digging Day New Plan · April More text challenge", click to see the details of...
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Analysis of sending principle of OData metadata request of SAP UI5 application
February 6, 2024
by Daniel Walters
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When we use OData model to read data from remote server in SAP UI5 application, please refer to my article: SAP for details
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“JS” Promise static functions and error handling
February 6, 2024
by Shray Uppal
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We mainly talk about some static methods and exception handling commonly used in Promise with demo, so that we can better understand and use Promise...
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Read-only modifiers in TypeScript
February 6, 2024
by Jessica Bridges
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In Typescript 2.0, the readonly keyword is introduced to modify properties in a class that cannot be modified after being modified by readonly ** (read-only...
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Vue data response principle
February 6, 2024
by Shane Wright-Parkinson
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At the heart of Vue.js is a set of "responsive systems". "Responsive" means that when data changes, Vue notifies the code that uses the data....
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Angular5 server rendering combat
February 6, 2024
by Miss Sara Welch
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This article builds on the previous Angular5 article, which covered the process of building An Angular5 Youdao translation and the solutions to the problems encountered....
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Handwritten [horizontal column with oblique triangle] progress bar implementation
February 6, 2024
by Stewart Pugh
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Make writing a habit together! This is my first day to participate in the "Gold Digging Day New Plan · April More text challenge", click...
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Anti-vibration and throttling
February 6, 2024
by Shlok Sridhar
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Both shake-out and throttling are designed to prevent multiple calls to a function from causing a page call, but they are different in nature. Shake-out...
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RxJS conversion Operator (RxJS)
February 6, 2024
by Dr. Carol Jones
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RxJS has many magical things, including chained calls, lazy output values, isolated data and operations, responsive programming, and so on. It is a practical application...
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We know that 0.1+0.2 = 0.30000000000000004, so how do we make it equal to 0.3
February 6, 2024
by Steven Ferrell
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Primary school math teacher taught us, 0.1 + 0.2 = 0.3, but why in the browser console output is 0.30000000000000004? This problem, how to solve
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RequestAnimationFrame Loads large amounts of data
February 6, 2024
by Lisa Daniel
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1, create a new folder mkdir Bigdata 2, CD Bigdata go to the folder 3, initialize package.json 2, back-end simulation 20W data
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This points to the problem
February 6, 2024
by Nathan Francis
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The normal function this always refers to the object that last called it. The arrow function's 'this' is determined by its outer scope and refers...
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Js event loop (including async execution in event queue)
February 6, 2024
by Todd Wright
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Do you still get the order of execution of js code wrong? What is the order in which js code is run? This is the...
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Custom picture lazy loading implementation
February 6, 2024
by Keya Bahri
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Custom picture lazy loading, Vue based demo, by scrolling events to check the top value of picture elements and the height of the screen, so...
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Amap automatically generates electronic fences
February 6, 2024
by Michael Murphy
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2. Draw a circle on the map according to the point X. Find 8 directions to east, southeast, south, southwest, west, northwest, north and northeast...
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TypeScript configures strictNullChecks for strict NULL types
February 6, 2024
by 李懿
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In TS, there are corresponding JS base types null and undefined. In TypeScript, the basic data types' undefined 'and' null 'in JS have their own...
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You are one closure away from high-quality code encapsulation. Get it!
February 6, 2024
by Mamooty Din
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Closures have been a platitude, and different people have different understandings of closures. Today I'm going to talk about closures, and we're going to discuss...
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