Adding events
To make our template a bit more dynamic, we will add a simple event, which will reactively rerun the logContext helper we created earlier.
First, however, we need to add a button to our contextExample template:
<button>Get some random number</button>
To catch the click event, open examples.js and add the following event function:
Template.contextExample.events({
'click button': function(e, template){
Session.set('randomNumber', Math.random(0,99));
}
});This will set a session variable called randomNumber to a random number.
Note
We will talk in depth about sessions in the next chapter. For now, we only need to know that when a session variable changes, all functions that get that session variable using Session.get('myVariable') will run again.
To see this in action, we will add a Session.get() call to the logContext helper, and return the former set's random number as follows:
Template.contextExample.helpers({
logContext: function(){
console.log('Context Log...