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This study is a second year thesis in Software Engineering at the Blekinge Institute of Technology. It investigates differences between frameworks and Vanilla JavaScript according to requirements in modern web applications. Region Blekinge, a municipal institution, wanted to research a prototype for a search function for their future website. Using the prototype young people would be able to retrieve information about schools and educations in their area to better be able to make a good choice. The objective is to find out what a JavaScript framework has to contribute, and especially when it comes to maintainability. A comparative analysis focusing on the code implementation was therefore made between two prototypes of the application. The results of the study shows that Vanilla JavaScript is more popular and has a higher maturity, while the framework Vue.js is more maintainable when it comes to reusability of code components, databinding, readability of code and code size. A drawback for frameworks is that they have a tendency to evolve quickly, and some of them even gets obsolete. The choice between the competing techniques was hard, but in the end Vanilla JavaScript was chosen for the application. The main reason being that the future is estimated to be more stable for Vanilla JavaScript, and for a municipal institution stability is important since one needs to appear trustworthy and build systems that will remain as stable as possible in the long term. / Denna studie är en andraårs exjobbsrapport i Programvaruteknik vid Blekinges Tekniska Högskola. Den undersöker skillnader i ramverk och Vanilla JavaScript enligt krav för modernawebbapplikationer. Region Blekinge efterfrågade en prototyp för en sökfunktion för deras framtida webbsida. Genom att använda prototypen skulle unga kunna söka information om skolor och utbildningar i deras område för att lättare kunna göra ett bra val. Målsättningen är att ta reda på vad ett JavaScript-ramverk kan erbjuda, där fokus ligger på frågor om underhållbarhet. En jämförande analys som fokuserade på det programmeringstekniska gjordes mellan två prototyper av applikationen. Resultatet av studien visar att Vanilla JavaScript är mer populärt och har en högre grad av mognad, medan ramverket Vue.js är mer underhållbart med tanke på återanvändbarhet av kodkomponenter, datahantering, läsbarhet av kod och kodmängd. En nackdel för ramverk är att de har en tendens att utvecklas snabbt, och vissa av dem blir till och med ibland föråldrade. Valet mellan de konkurrerande teknikerna var inte självklart, men till slut föll det på Vanilla JavaScript. Huvudanledningen är att framtiden bedöms vara mer stabil för Vanilla JavaScript, och för en kommunal institution är stabilitet viktigt eftersom man behöver signalera tillförlitlighet och bygga system som kommer att förbli så stabila som möjligt i det långa perspektivet.

The goal of this study was to investigate how the use of language models in the context of code structure analysis could impact how developers manage code structure. To do this, a prototype tool GOSPLAT (GoLang Static Package Language-model Analysis Tool) was created. The objective was to, in a qualitative manner, find themes of both the strengths and shortcomings of GOSPLAT as well as the perceived need and willingness of a tool like this in a company setting. Methods used for this case study were primarily interviews and observations, where the researchers observed subjects when using the tool, as well as further investigating by conducting interviews at which they were more freely able to talk about their experiences. In this case study, both project managers and developers in a company participated. The results were mixed, with the solution both showing promising results for improvements in code quality, as well as limitations where it might have misled the developer. However, during the entire study, all subjects were adamant in their belief in a tool like GOSPLAT, showing genuine interest in incorporating such a tool into their workflow. In conclusion, a genuine need for tools like GOSPLAT was found to exist, and improvement areas were identified to enhance their effectiveness.