What is the difference between uneval() and .toSource()

What is the difference between uneval() and .toSource()

What is the difference between uneval(...) and .toSource()?

The toSource() method returns a string representing the source code of the object.

The uneval() method creates an string representation of the source code of an Object.


One takes a param, the other doesn't. That appears to be the only difference, although the use of both is discouraged.

uneval(object);

Object.toSource();
obj.toSource();

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/uneval https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/toSource

Straight from those sites above:

Non-standard

This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

I'd stay away from this feature. There's likely a better way to accomplish what you're trying to do.

Object.prototype.toSource(), toSource/uneval() of a function object isn't reconstructed by 'eval()' Struggling to see the difference between var x = new String("Hello World") var y = uneval(x) � Difference between eval() and uneval() functions: The uneval() function returns the source of a given object whereas the eval() function evaluates that source code in a different memory area. Note: Above codes will run only in Firefox web browser.


uneval() is a method you can pass a piece of javascript to. .toSource() is an extension method for objects.

Both functions output the same shown in the following example:

var a = 1234;
console.log(uneval(a)); //outputs "1234"
console.log(a.toSource()); //outputs "1234"

73760, Difference between eval() and uneval() functions: The uneval() function returns the source of a given object whereas the eval() function evaluates that source code� Difference between eval() and uneval() functions: The uneval() function returns the source of a given object whereas the eval() function evaluates that source code in a different memory area. Note: Above codes will run only in Firefox web browser.


Be aware: Both, toSource and uneval, are proprietary non-standard features.

While uneval is a function, i.e. a window method independend from the subject, toSource is implemented as a method of the subject. Due to this fact, additional error handling needs to be done when using toSource. On the other hand, uneval is capable to handle variables not being initialized with an actual object.

for(let v of [null, undefined])
{
  console.log(uneval(v));

  try
  {
    console.log(v.toSource());
  }
  catch(e)
  {
    console.log(e.message);
  }
}

JavaScript, (SpiderMonkey has the nonstandard uneval, as well as Object.prototype. C. prototype = { name : "c", title : "a C object", toSource : function() { return this.name + "::C\n" + There is a big difference between being able to inspect/debug an Almost all built-ins in Firefox have a 'toSource' prototype method that is non-standard. uneval also tries to call 'toSource' or falls back to generic code for serializing objects. 'toSource' can be a useful debugging tool, but at least within Firefox we can use the better devtools instead.


Object.prototype.inspect ?, toSource method, which was inherited by every object derived from Object including Array, Date toSource() and uneval() have been removed. 7 What is the difference between uneval() and .toSource() Dec 27 '13. 5 Windows threads - how to make a method a thread function in windows? Jun 9 '11.


toSource() and uneval() have been removed, toSource() メソッドは、オブジェクトのソースコードを表す文字列を返します。 uneval() メソッドは、 What is the difference between uneval() and . 7 What is the difference between uneval() and .toSource() 5 Windows threads - how to make a method a thread function in windows? View more network posts →


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