Javascript split only once and ignore the rest

a = line.split(/:/);
key = a.shift();
val = a.join(':');

Use the greedy operator (?) to only split the first instance.

line.split(/: (.+)?/, 2);

If you prefer an alternative to regexp consider this:

var split = line.split(':');
var key = split[0];
var val = split.slice(1).join(":");

Reference: split, slice, join.

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