HTML DOM open() Method

Open an output stream, add some text, then close the output stream:

document.open();
document.write("<h1>Hello World</h1>");
document.close();

More "Try it Yourself" examples below.

Definition and Usage

The open() method opens an output stream to collect the output from any document.write() or document.writeln() methods.

Once all the writes are performed, the document.close() method causes any output written to the output stream to be displayed.

Note: If a document already exists in the target, it will be cleared.

Note: Do not confuse this method with the window.open() method, which opens a new browser window.

Method
open()	Yes	Yes	Yes	Yes	Yes

document.open(MIMEtype,replace)

Parameter	Description
MIMEtype	Optional. The type of document you are writing to. Default value is "text/html"
replace	Optional. If set, the history entry for the new document inherits the history entry from the document which opened this document

Return Value:	No return value

Using parameters; Open an output stream, add some text, then close the output stream:

document.open("text/html", "replace");
document.write("<html><body><p>Hello World!</p></body></html>");
document.close();

Using window.open() together with document.open() to open an output stream in a new window, add some text, then close the output stream:

var w = window.open();
w.document.open();
w.document.write("<h1>Hello World!</h1>");
w.document.close();