JavaScript UI tasks

In a previous episode we looked at how CodeSignal can evaluate a front-end user interface task involving React; this time, we check out an example written in classic JavaScript. The particular task we explored is focused on the candidate’s JavaScript abilities within the web environment, so the HTML and CSS files are provided as boilerplate. This provides more targeted assessment, while cutting down on the candidate’s time commitment. Furthermore, this task is technically labelled as a recovery type (as seen in episode 7), which means that even in a multi-file environment, we can control which parts of the code can be modified by the user (in this case, the whole .js file).

Similar to other front-end tasks, the tests are administered using a selenium browser, which renders the page within the DOM, allowing it to check if the elements’ properties are within expected ranges. Since this project involves a .js file, the selenium browser can also interact with the page and check if it’s having the intended effect on other elements. And since each of these interactions can be separated into distinct tests, the user gets detailed information on what they were able to do correctly and what still needs to be done. This has additional benefits to hiring managers, as they receive a more detailed understanding of how the candidate performed (eg: they passed 75% of the tests, rather than a simple pass or fail result).

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