Format json file within vim
2017-10-15
1 min read
Put the following snip to your vimrc, whenever you open a JSON file, you can format it with hotkey fj in normal mode.
function FmtJSON(...)
let code="\"
\ var i = process.stdin, d = '';
\ i.resume();
\ i.setEncoding('utf8');
\ i.on('data', function(data) { d += data; });
\ i.on('end', function() {
\ try {
\ JSON.parse(d)
\ } catch(e) { return console.log(d); }
\ console.log(JSON.stringify(JSON.parse(d), null,
\ " . (a:0 ? a:1 ? a:1 : 2 : 2) . "));
\ });\""
execute "%! node -e " . code
endfunction
nmap fj :<C-U>call FmtJSON(v:count)<CR>The main part of function FmtJSON is copied from somewhere, but if the JSON file is malformed you probably override the original file unexpectedly, so I added try-catch in the end event handler.