difflet

Create colorful diffs for javascript objects.

example

string.js

var difflet = require('difflet');

var s = difflet.compare({ a : 2, c : 5 }, { a : 3, b : 4 });
process.stdout.write(s);

output:

colorful output

colors.js

var diff = require('difflet')({ indent : 2 });

var prev = {
    yy : 6,
    zz : 5,
    a : [1,2,3],
    fn : 'beep',
    c : { x : 7, z : 3 }
};

var next = {
    a : [ 1, 2, "z", /beep/, new Buffer(3) ],
    fn : function qqq () {},
    b : [5,6,7],
    c : { x : 8, y : 5 }
};

diff(prev, next).pipe(process.stdout);

output:

colorful output

green for inserts, blue for updates, red for deletes

methods

var difflet = require('difflet')

var diff = difflet(opts={})

Create a difflet from optional options opts.

With opts.start(type, stream) and opts.stop(type, stream), you can write custom handlers for all the types of differences: 'inserted', 'updated', and 'deleted'. By default green is used for insertions, blue for updates, and red for deletions.

If opts.indent is set, output will span multiple lines and opts.indent spaces will be used for leading whitespace.

If opts.comma === 'first' then commas will be placed at the start of lines.

Setting opts.comment to true will turn on comments with the previous contents like this:

Setting opts.deepEqual allows a different equality function to be used. By default deep-is is used.

object comments

diff(prev, next)

Return a stream with the colorful changes between objects prev and next.

diff.compare(prev, next)

Return a string with the colorful changes between prev and next.

difflet.compare(prev, next)

Return a string with the colorful changes between prev and next with the default options.

install

With npm do:

npm install difflet

test