Is document.write actually deprecated?
javascript
Solution
No. It's just most often considered bad practice and almost as misused as `eval`.
Read: Why is document.write considered a 'bad practice'?
Quoting some important points from the linked question above:
`document.write` (henceforth DW) does not work in XHTML
DW executed after the page has finished loading will overwrite the page, or write a new page, or not work
DW executes where encountered: it cannot inject at a given node point
Also as @JaredFarrish stated, `deprecated` is mostly a state of mind. It's a relic that most likely will never go away otherwise it'd break many sites - even the Traditional Google Analytics code uses DW.
Obviously, functionality-wise it has been superseded long ago by proper DOM manipulation methods, and quoting the linked question above again: `DW is effectively writing serialised text which is not the way the DOM works conceptually`.
To counterbalance, here's a list of where DW may be considered appropriate:
- There's nothing wrong with DW, per se - it won't destroy your page if you use it appropriately;
It allows for easily fallbacking an external script to a local copy such as when loading jQuery from a CDN fails:
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script>window.jQuery || document.write('<script src="js/libs/jquery-1.8.2.min.js">\x3C/script>');</script>
It's one of the easiest ways to insert external snippets in your page while keeping the code short (e.g. analytics). Note that systems such as Google Analytics now favor the asynchronous method - creating a `script` element through the `document.createElement` API, setting its properties and appending it to the DOM - rather than using its traditional `document.write` method.
tl;dr: DW is easily misused, hence for real world use, prefer a proper DOM manipulation method whenever viable.
Problem
I've seen a bit of chatter about `document.write` being deprecated, but I'm not sure exactly where this information came from. I did look it up in MDN, but there wasn't any notation about it being deprecated.. so now I'm a bit suspicious. Google wasn't much help either unfortunately (perhaps I just wasn't using the right search terms). If it is indeed deprecated, can someone link me to the appropriate documents showing that it is indeed deprecated?