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[D3] Create DOM Elements with D3 v4

Change is good, but creating from scratch is even better. This lesson shows you how to create DOM elements from D3 and insert them into your document as needed. You’ll officially be on your way to creating data visualizations! d3.select('.title') .in…

[D3] Select DOM Elements with D3 v4

Before you can create dazzling data driven documents, you need to know how D3 accesses the DOM. This lesson will show you the ins and outs of accessing existing DOM elements with D3. var div = d3.select('div'); console.log(div.nodes()); var divLinks…

[D3] Modify DOM Elements with D3 v4

Once you can get hold of DOM elements you’re ready to start changing them. Whether it’s changing colors, labels, or even link destinations, this lesson demonstrates the process and patterns for updating the DOM using D3’s powerful APIs. // you will s…

[D3] Create Chart Axes with D3 v4

Most charts aren’t complete without axes to provide context and labeling for the graphical elements being displayed. This lesson introduces D3’s APIs for creating, customizing, and displaying axes while building on topics from previous lessons. var m…

[Cypress] Create Aliases for DOM Elements in Cypress Tests

We’ll often need to access the same DOM elements multiple times in one test. Your first instinct might be to use cy.getand assign the result to a variable for reuse. This might appear to work fine at first, but can lead to trouble. Everything in Cypr…

[D3] 10. Creating Axes with D3

<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <script src="../bower_components/underscore/underscore-min.js"></script> <script src="../v…

Adding DOM elements to document

1.JavaScript 添加DOM Element 执行效率比较: 抄自:http://wildbit.com/blog/2006/11/21/javascript-optimization-adding-dom-elements-to-document JavaScript optimization: Adding DOM elements to document Scenario: you're developing rich Web application and you need to…

[D3] 12. Basic Transitions with D3

<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <script src="../bower_components/underscore/underscore-min.js"></script> <script src="../v…

ReactDOM & DOM Elements

一.ReactDOM 1.1 render() ReactDOM.render(element,container,[callback]) 在container中渲染一个React元素,然后返回组件一个引用(对于stateless组件,返回null).如果React元素已经加入到了container中,再次执行上面的方法会执行更新操作,只在必要时更新DOM来反映最新的React元素.如果提供可选的回调函数,则该callback会在组件渲染或者更新完后执行. 注意: ReactDOM.render…

[D3] SVG Graphics Containers and Text Elements in D3 v4

SVG is a great output format for data visualizations because of its scalability, but it comes with some idiosyncrasies and unique challenges. In this lesson we’ll learn how to use graphics containers, the SVG equivalent of a div, as well as text elem…