Javascript Archives - Jeff Everhart

Using AmCharts with Vue and Webpack

I finally swallowed the Webpack pill, mostly because I wanted to get the most out of single file Vue components for some new projects I’m working on, and Webpack is along for the ride. Overall, it’s been a semi-frustrating but also instructive experience. Before this I never used ESLint or any other type of linting, […]

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Analyzing and Visualizing Networks

One of the current projects I’m working on involves building out some analytical tools that sit on top of an application that lets students track attendance at extra curricular events for a living and learning program for the daVinci Center. For most of the visualizations, I used amCharts to build out some nice looking and functional […]

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Audiographics: Annotating Sound

Over the last several weeks, I’ve been working on several prototypes to help facilitate different types of annotations. Most educators are already pretty familiar with the typical textual annotation, but as new media becomes more important, we ought to have tools that facilitate annotation on other types of media as well. What is an audiographic? […]

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Creating a CRUD Web App with Google Sheets

Google Sheets tends to be my go to whenever I need to build a really lightweight application that has a limited life span. Usually, these things typically involve a short turnaround or some type of very well-defined set of requirements. After Tom did some work demonstrating the utility of silent Google Forms submissions using JS […]

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Visualizing Geographic Data with D3

I’m not sure the power of visualizing data can be understated in the modern world. After all, we have more data than we’ve every had before, and we at least seem to understand the world we live in less and less. For example, this image below displays population density in Virginia census tracts, but what […]

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The Future of JavaScript and the Browser

I’ve been doing a deep dive into Vanilla JavaScript lately, partly as a pretty overt reaction to the proliferation of client-side MV* frameworks. My thought process is that the time spent learning frameworks isn’t necessarily transferrable beyond some of the high-level concepts they help you solve, things like routing, data-binding, and dependency injection. But, once […]

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Fixing error: cannot read property “values” from undefined

Typeerror: cannot read property “values” from undefined is one of the most persistent and frequent errors you can get when doing any type of scripting in Google Apps Script. One of the most frequent questions I get on this blog, so I decided to dedicate a post to helping people troubleshoot this pesky error. First, […]

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How to build an HTTP file server with Node.js

Over the last year or so, I’ve been working more and more with Node.js for a variety of projects. I started by building a few command line apps, progressed to some simple Node/Express sites, and more recently tackled some pretty complex apps that integrate RESTful web services that are hosted on AWS and Heroku. While […]

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Building A Simple Heat Map with D3

Heat maps are a great way to analyze frequency in a data set. Beautiful and creative things happen when you are stuck in an airport for four hours. I’ve been wanting to explore heat map visualizations for awhile now, so when I had some time to kill flying back from SXSW, I decided to take […]

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The Pros and Cons of Using Google Sheets as an Application Backend

I’ve been doing more lately working with APIs of different sorts, and I recently stumbled onto some cool ways to use Google Sheets to connect with APIs and store the data very easily in a spreadsheet. Having completed the linked project in less than an hour, I was really interested in figuring out the pros […]

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