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// very simple console wrapper to preserve history | |
(function(){ | |
// Returns a version of obj without functions | |
// or recursive references. Recursive references | |
// will blow out the stack when we try to | |
// serialize. | |
function strippedObject(obj, cache = []) { | |
var newObj = {}; | |
for (var property in obj) { | |
if (obj.hasOwnProperty(property)) { | |
var value = obj[property]; | |
switch (typeof value) { | |
case "function": | |
break; | |
case "object": | |
if (cache.indexOf(property) == -1) { | |
cache.push(property); | |
newObj[property] = strippedObject(value, cache); | |
} | |
break; | |
default: | |
newObj[property] = obj[property]; | |
} | |
} | |
} | |
return newObj; | |
} | |
function serializable(value) { | |
switch (typeof value) { | |
case "function": | |
return "<function>"; | |
case "object": | |
return strippedObject(value); | |
default: | |
return value; | |
} | |
} | |
var undecorated_log = console.log; | |
console.history = console.history || []; | |
console.log = function(){ | |
for (var arg of arguments) { | |
console.history.push({ | |
time: (new Date()).toString(), | |
value: serializable(arg), | |
type: 'message' } ); | |
} | |
undecorated_log.apply(console, arguments); | |
}; | |
var undecorated_table = console.table; | |
console.table = function(){ | |
console.history.push({ | |
time: (new Date()).toString(), | |
value: serializable(Array.prototype.slice.call(arguments)[0]), | |
type: 'table' | |
}); | |
undecorated_table.apply(console, arguments); | |
}; | |
})(); |
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