d3.js本来主要是用于用“数据驱动dom”,在浏览器端,接收后端数据,数据绑定,渲染出svg. 即使是在ng中用,也是会由框架打包,供客户端下载. 那么,如果用所谓后端渲染,发布静态的svg,那就要在node里用d3. 几个遇到的点: 1 d3+jsdom实现后端渲染svg node和前端的区别,就是没有全局window.document 这个对象.d3选择器无从选起. 1 创建jsdom对象 const { JSDOM } = require("jsdom"); const my_…

总结一段D3.js部署node环境的安装过程 准备阶段: 首先电脑上要安装node环境,这个阶段过滤掉,如果node环境都不会装,那就别玩基于node环境搞的其他东西了. 搭建环境: 我在自己的F:系统盘创建一个工程目录d3Node,然后创建一个package.json文件,里面配置如图: 其中:dependencies字段描述了你的工程所用到的库运行时的依赖,他们可以使你的工程在浏览器中正常运行.在d3中只有一个依赖,d3是D3在npm库中发布的名字,其中版本号3.x标明该工程可以兼容任意大于…

1.变量 JAVASCRIPT的变量是一种类型宽松的语言.定义变量不用指定数据类型.而且还是动态可变的. var value = 100;value = 99.9999;value = false;value = "This can't possibly work.";value = "Argh, it does work! No errorzzzz!"; 2.数组 从0开始 var percentages = [ 0.55, 0.32, 0.91 ];var na…

如何使用d3来解析自定义格式的数据源? var psv = d3.dsvFormat("|"); // This parser can parse pipe-delimited text: var output = psv.parse("first|last\nabe|lincoln") console.log(output[0]) // 将输出以下内容: => {first: "abe", last: "lincoln"…

Similar to line charts, area charts are great for displaying temporal data. Whether you’re displaying a single set of data or multiple sets using an overlapping or stacked layout, D3 provides APIs to make the process straightforward. This lesson walk…

Line charts are often used to plot temporal data, like a stock price over time. In this lesson we’ll see how to use D3 APIs to create our own simplified version of the charts seen on Google Finance. var margin = { top: 10, right: 20, bottom: 65, left…

Scatter plots, sometimes also known as bubble charts, are another common type of visualization. They’re extremely versatile thanks to their ability to display multiple dimensions of data simultaneously using x and y position, opacity, color, and even…

Column and bar charts are staples of every visualization library. They also make a great project for combining the essential pieces of D3 like selections, scales, axes, and SVG elements. This lesson walks you through the process of creating an essent…

Making SVGs responsive is unfortunately not as simple as adding some media queries. This lesson introduces the viewBox attribute, which is used to control how SVGs scale. We’ll also examine a reusable function that can be used to make nearly any visu…

此文章为原创文章,原文地址:https://www.cnblogs.com/eagle1098/p/11431679.html 连线动画图 编辑器 效果如上图所示.本项目使用主要d3.jsv4制作,分两部分,一个是实际展示的连线动画图,另一个是管理人员使用鼠标编辑连线的页面.对于d3.js如何引入图片,如何画线等基础功能,这里就不再介绍了,大家可以找一些入门文章看一下.这里主要介绍一下重点问题. 1.连线动画图 此图的主要功能是每隔给定时间,通过ajax请求后台数据,并根据返回的数据动态改变每个…