There are many reasons for manipulating variables in JMeter, especially when you are loading data from a CSV data set config element. You might want to trim a JMeter variable, or grab just a substring. In all of these cases, your existing knowledge of JavaScript can come to the rescue. Wherever you were about to […]
Adobe Analytics can sometimes be a bit of an enigma, so people often turn to browser extensions to help them with debugging Adobe Analytics. However, for those of us who spend most of our lives in browser tools; there’s a simple way to get x-ray vision into what Analytics is thinking. Let’s get straight down […]
A common problem with images, especially if they are user-generated, is that they don’t have the correct aspect ratio for their intended purpose. Also, as we re-flow pages for many different devices, we often want the image to work with different aspect ratios. This is where the CSS object-fit property comes in very useful. There […]
If you have been writing websites or web apps for any length of time, you will almost certainly have implemented some form of lazy-loading using JavaScript. I recently worked on a web app that implemented a search that benefitted to the tune of half-a-gig by deferring the loading of images until those images were actually […]
I was working on a search system that needed to simplify the strings for comparison. It needed to compare the text regardless of special characters (diacritic marks) or casing. The following function breaks the special characters into their component parts, before removing the “special” parts and lower-casing the whole thing. function normalise(term) { // Simplifies […]
One of the most common issues I see in content-managed websites is the presence of a fully-qualified image address that isn’t secure when the website itself is. When this happens, you’ll need to find all images that aren’t secure and fix them. For example, if you are visiting https://www.example.com and there is an image http://www.example.com/image.png […]
Has you ASP.NET applicaiton reported that minification failed? If you are using bundles in application, you might come across this exception comment at the top of your larger-than-expected bundle file. /* Minification failed. Returning unminified contents. (List of problems here) */ It can happen for JavaScript or CSS, but it means minifier has found something […]
There are a great many posts on the subject of capturing events for telephone or email clicks in Google Analytics. Of the examples I found, none handled asynchronous content. That means there is the potential for them to fail to capture clicks if the links are loaded after the initial document ready event in the […]
This is just a short note on how to use an ECMAScript Proxy to intercept methods. There are plenty of examples that intercept properties, but examples with methods seem absent currently. For demonstration purposes, we’re going to intercept a very famous method. The console log method takes any number of arguments of any type. This […]
ECMAScript has an optional chaining proposal on the way (see TC39 on GitHub). It uses ?. to chain together an expression in a way that forgives a breaking chain. For example, myObj.items[0].data can fail if myObj is null, or undefined, or doesn’t have an items member, or there are no entries in the items collection, […]