I highly recommend studying the works of Edward Tufte and, if you can, attending one of the workshops he does from time to time. I've found his ideas on visualizing information very useful when designing various web apps, especially single page ones meant for visualizing information. His critiques of PowerPoint are also helpful when it comes time to do presentations to users.
As for the day-to-day, nuts-and-bolts, any good reference on HTML5 and CSS3 will be useful. There are a lot around. You'll probably also want to grab ones on Bootstrap, Javascript, Typescript and whatever front-end framework you want to use (Angular, React, etc.). Stack Overflow is also helpful at times although the high levels of trolling and general rudeness there can make it unpleasant to participate actively there.
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I highly recommend studying the works of Edward Tufte and, if you can, attending one of the workshops he does from time to time. I've found his ideas on visualizing information very useful when designing various web apps, especially single page ones meant for visualizing information. His critiques of PowerPoint are also helpful when it comes time to do presentations to users.
As for the day-to-day, nuts-and-bolts, any good reference on HTML5 and CSS3 will be useful. There are a lot around. You'll probably also want to grab ones on Bootstrap, Javascript, Typescript and whatever front-end framework you want to use (Angular, React, etc.). Stack Overflow is also helpful at times although the high levels of trolling and general rudeness there can make it unpleasant to participate actively there.