mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-11-29 21:09:56 +00:00
19 lines
1.2 KiB
Plaintext
19 lines
1.2 KiB
Plaintext
|
created: 20190201232200698
|
||
|
|
modified: 20190216175629825
|
||
|
|
tags:
|
||
|
|
title: Hello World widget tutorial
|
||
|
|
type: text/vnd.tiddlywiki
|
||
|
|
|
||
|
|
Now let's create a widget which actually has output.
|
||
|
|
|
||
|
|
When tiddlywiki encounters a widget definition like `<$hello>` it will create an object which is an instance of the class which is exported by the widget code.
|
||
|
|
|
||
|
|
In addition to creating an instance of the class, tiddlywiki will call the render method of the resulting object. The render method is expected to create a dom node which will be display in place of the widget.
|
||
|
|
|
||
|
|
In the `donothing` example the core widget was exported. The core widget class doesn't have a render method which creates a dom node and that's why there is no output. Getting output requires writing a widget class which inherits from the core `Widget` class. Code in the render method of this class will display the hello world message.
|
||
|
|
|
||
|
|
The [[hello.js]] tiddler has code which accomplishes that:
|
||
|
|
{{hello.js}}
|
||
|
|
The code for importing the core widget class remains, but now we also have code to create our own class which inherits from it. In addition an implementation of the `render` method is included. Here is the result:
|
||
|
|
{{Hello World demo}}
|