Advanced condition library for Node, Phantom, RequireJS, CommonJS and the Browser.
WARNING: This package has been deprecated and is not in active development. Most of your use cases for this library can be solved with Promises, which are now a native feature of JavaScript.
npm install condition
Getting an instance of condition can be different depending on the kind of environment you're in. condition supports many different environments and module systems - just try yours, chances are, it'll work. If not, file an issue and I'll work on it.
// Get an instance of condition
var condition = require('condition');
// Wait for a condition to call a function
condition.wait(function() {
// Do your condition testing here
return true;
}, function(res) {
// This is your callback
// Res is the result from your condition
console.log('Callback!');
});
// Every time a condition is true, call a function
condition.when(function() {
// Do your condition testing here
return true;
}, function(res) {
// Res is the result from your condition
return true;
});
// Call a function until a condition becomes true
condition.until(function () {
// Do your condition testing here
return true;
}, function (res) {
// Execute this function until the previous condition returns true
});Sometimes your condition functions will be asynchronous, condition supports that too. Simply ask for at least one argument in your condition function, and condition will assume that it is an asynchronous condition. Call the first argument that the condition function is passed, with your "result", when you're done.
Here's an example:
condition.wait(function (done) {
setTimeout(function () {
// Call the done() function you passed as a parameter
// with the result of your condition
done("truthy value");
}, 100);
}, function (res) {
console.log(res); // logs "truthy value"
});