LDApp is designed as a very modular JavaScript Linked Data stack. A requirement for the modular design was an API to handle the graph data. RDF-Interfaces was the only JavaScript API standard, but lacks store handling and easy management of multiple parsers and serializers. The existing RDF-Interfaces API was extended to cover these use cases. To complete the framework, a JSON-LD integration is...

We present a browser application for estimating the number of frequent patterns, in particular itemsets, as well as the pattern frequency spectrum. The pattern frequency spectrum is defined as the function that shows for every value of the frequency threshold σ the number of patterns that are frequent in a given dataset. Our demo implements a recent algorithm proposed by the authors for finding...

JavaScript ranks among the most popular programming languages for the web, yet its highly dynamic type system and occasionally unintuitive semantics make programming particularly error-prone. This paper presents Javanni, a verifier for JavaScript programs that can statically detect many common programming errors. Javanni checks the absence of standard type-related errors (such as accessing unde...

JavaScript Client-side hidden web pages (CSHW) contain dynamic material created as a result of specific user activities. The number of CSHW websites is increasing. Crawling the so-called Hidden Web is challenging, particularly when JavaScript CSHW from an external website is seamlessly included as part of the web pages. We have developed a prototype web crawler that efficiently extracts content...

JavaScript is widely used in web-based applications and is increasing popular with developers. So-called ”browser wars” in recent years have focused on JavaScript performance, specifically claiming comparative results based on benchmark suites such as SunSpider and V8. In this paper we evaluate the behavior of JavaScript web applications from commercial websites and compare this behavior with t...

JavaScript systems are becoming increasingly complex and large. To tackle the challenges involved in implementing these systems, the language is evolving to include several constructions for programmingin-the-large. For example, although the language is prototype-based, the latest JavaScript standard, named ECMAScript 6 (ES6), provides native support for implementing classes. Even though most m...

JavaScript has long outpaced its original target applications, being used not only for coding complex web clients, but also web servers, game development and even desktop applications. The most appealing advantage of moving applications to JavaScript is its capability to run the same code in a large number of different devices. It is not surprising that many compilers target JavaScript as an in...

Behavioral researchers are increasingly using Web-based software such as JavaScript to conduct response time experiments. Although there has been some research on the accuracy and reliability of response time measurements collected using JavaScript, it remains unclear how well this method performs relative to standard laboratory software in psychologically relevant experimental manipulations. H...

Owing to the popularity of the PDF format and the continued exploitation of Adobe Reader, the detection of malicious PDFs remains a concern. All existing detection techniques rely on the PDF parser to a certain extent, while the complexity of the PDF format leaves an abundant space for parser confusion. To quantify the difference between these parsers and Adobe Reader, we create a reference Jav...