## Writing plugins ##
All you need to do to make a new plugin is creating an init function
and a set of options (if needed), stuffing it into an object and
putting it in the $.plot.plugins array. For example:
```js
function myCoolPluginInit(plot) {
plot.coolstring = "Hello!";
};
$.plot.plugins.push({ init: myCoolPluginInit, options: { ... } });
// if $.plot is called, it will return a plot object with the
// attribute "coolstring"
```
Now, given that the plugin might run in many different places, it's
a good idea to avoid leaking names. The usual trick here is wrap the
above lines in an anonymous function which is called immediately, like
this: (function () { inner code ... })(). To make it even more robust
in case $ is not bound to jQuery but some other Javascript library, we
can write it as
```js
(function ($) {
// plugin definition
// ...
})(jQuery);
```
There's a complete example below, but you should also check out the
plugins bundled with Flot.
## Complete example ##
Here is a simple debug plugin which alerts each of the series in the
plot. It has a single option that control whether it is enabled and
how much info to output:
```js
(function ($) {
function init(plot) {
var debugLevel = 1;
function checkDebugEnabled(plot, options) {
if (options.debug) {
debugLevel = options.debug;
plot.hooks.processDatapoints.push(alertSeries);
}