User-474980206 posted
visual studio code is by far the most popular. but sublime, emacs, vim and bbedit are popular.
for windows developers visual studio 2017 & 2019 are good choices, but the extension support does not match visual studio code (vs 2019 is working on this).
i'd use visual studio code over brackets.
note: good IDE support for SPA's mostly depend on good support of node.js projects, which almost all SPA's are. while many IDE's can debug the javascript, the chrome/webkit dev tools still seem easier to use, and more reliable. I never use the IDE to debug
javascript code.