deno_printf.deno.txt

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VERSION ==>                       #Part of Deno
                                  #sprintf (not printf()) is browser compatible, except %i %I %#v

@std/fmt/printf.ts                #
sprintf(STR, ARG...)->STR2        #Apply template
printf(STR, ARG...)               #Like console.log(sprintf(...))

%%                                #Escape %

%s                                #STR
%t                                #BOOL
%b                                #INT, as base 2
%o                                #INT, as base 8
%x %X                             #INT, as base 16
%f %F                             #FLOAT, decimal notation
%e %E                             #FLOAT, exponent notation
%g %G                             #FLOAT, decimal|exponent notation depending on size

%c                                #String.fromCodePoint('CHAR')
%T                                #typeof ARG
%j                                #JSON.stringify(ARG)
%i                                #Deno.inspect(ARG, { colors: true, depth|iterableLimit: Infinity })
%I                                #Same with OPTS.compact true
%v                                #ARG.toString()

%[FLAGS][NUM][.NUM2]CHAR          #Min length NUM, max precision NUM2
                                  #NUM[2] can be * to use next ARG
                                  #With Deno.inspect(), precision is OPTS.depth if using %#v

FLAGS ==>                         #
+                                 #Prepend + to positive NUM
-                                 #Left padding
0                                 #Padding with 0
#                                 #With:
                                  #  - %b: prefix with 0b
                                  #  - %o: prefix with 0
                                  #  - %x %X: prefix with 0x
                                  #  - %g %G: keep trailing zeros
                                  #  - %v: use Deno.inspect(ARG)
SPACE                             #Insert space:
                                  #  - %x %X: between bytes
                                  #  - positive NUM: at beginning, for padding with negative NUMs
<                                 #Apply on ARR items

%[NUM]CHAR                        #Actual brackets. Use ARG number NUM instead of next one (1-based)
                                  #Can also be used for min length and max precision, if followed by *