Data visualization

Warehouse address: Laotang / data visualization-211025 Project presentation address: Document User name: admin Password: 123456 Interface document address: dashboard Interface root path: http://www.itcbc.com:8000 Required technologies: Ajax, jQuery, echarts (third-party chart Library), third-party form verification plug-in, third-party prom ...

Added by madmega on Thu, 10 Mar 2022 16:40:24 +0200

JS of front-end three piece set -- JavaScript built-in method

1,Number 1-1 properties MAX_VALUE JS is the largest number that can be representedMIN_VALUE JS is the smallest number that can be represented 1-2 method toFixed(length) specifies the decimal of the reserved lengthtoExponential() is represented by scientific countingtoPrecision(length) requires the number to display integer + decimal acc ...

Added by cty on Thu, 10 Mar 2022 14:28:18 +0200

ES6 --- structural assignment of variables

1, Deconstruction assignment of array ES6 allows you to extract values from arrays and objects according to a certain pattern and assign values to variables, which is called structure. Previously, assigning values to variables can only be assigned directly; let a =1;let b =2;let c=3; In ES6, it can be written as: let [a,b,c] = [1,2,3]; You c ...

Added by caedo on Thu, 10 Mar 2022 14:06:30 +0200

JSON-RPC & postMessage on the encapsulation skills of browser message communication

WedgepostMessage It is commonly used in embedded iframe or Web Workers for cross page (thread) message communication. Similar shadows can be seen in some other development environments, such as Chrome plug-in environment, Electron environment, sigma plug-in, etc.In recent work, we often deal with iframe and Web Workers, deal with pages and embe ...

Added by Ting on Thu, 10 Mar 2022 08:26:20 +0200

Sentry construction process (front-end vue access)

1, Background & & roleAbnormal monitoring systemCollection exceptionCollect log information; Interface duration informationTimely warning; Send mailDisplay statisticsHigh cost of code review; Sometimes only syntax or code style problems can be found; There is not much time for deep reading of logical business problemsCompatibility probl ...

Added by DarrenReeder on Thu, 10 Mar 2022 05:45:20 +0200

After three minutes

background Before introducing Hooks, let's first talk about the creation methods of React components. One is class components and the other is pure function components. Moreover, the React team hopes that the components will not become complex containers, and it is better to just be the pipeline of data flow. Developers can combine pipelin ...

Added by mystrymaster on Thu, 10 Mar 2022 03:06:47 +0200

javascript advanced programming (Fourth Edition) lazy reading: Chapter 3

(46 - Chapter III 20218 + a1043) grammar Case sensitive ECMAScript is case sensitive. identifier An identifier is the name of a variable, function, property, or function parameter. An identifier consists of one or more of the following characters: The first character must be a letter, underscore () Or dollar sign ($);The remainin ...

Added by yes3no2 on Wed, 09 Mar 2022 20:24:43 +0200

Follow the react project (to P57)

The backend API interface is in this file, and the request path is known by the backend definition List of fixed contents for each column (antd) About render parameters Later, I'll verify these three parameters myself, and I don't know the difference between text and record. text and record are identical. console.log(text === record ...

Added by Xeoncross on Wed, 09 Mar 2022 19:50:51 +0200

javascript knowledge summary

1.JS usage: A. Tag: < script > < / script > B. Tags can be placed in the head or body. When in the body, the script should be placed at the bottom of the < body > element to improve the display speed, because Script Compilation will slow down the display. C. Default attribute: < script type = "text / JavaScript&q ...

Added by megavolt on Wed, 09 Mar 2022 18:18:15 +0200

The 15 Vue skills have been developed for some time before they can be used in this way (does what you know really include these?)

catalogue preface 1. Restrict a prop to a list of types 2. Use quotation marks to listen for nested attributes 3. Know when to use v-if 4. Abbreviation for a single scope slot 5. Mix local and global style s 6. Override styles for subcomponents 7. How to create a responsive variable outside Vue 8. Deconstruction in v-for 9. Cycle with ...

Added by bh on Wed, 09 Mar 2022 18:14:28 +0200