You can add a bit of customization easily with Content Editor Web Part, where you add Javascript and HTML. In this post you can find a snippet for SharePoint 2010 to open a custom page in the modal dialog window.
Snippet for AngularJS for working with checkbox controls. The task is to verify if checkbox is checked or not with AngularJS.
I guess SPServices is the best solution for SharePoint. We still have SharePoint 2010 and prepate to migrate to SharePoint 2016 through SharePoint 2013. But for current tasks which must be made immediately, we still use SharePoint 2010, but only without server code. Rather often we have to make custom views for other users.
There's a table in html page and you need to get the quantity of it's rows. It's easy to get it with jQuery.
Some notes about creating visible and invisible buttons in Knockout.js.
There's an equivalent in jQuery to PHP function print_r($array). It's good when you want to see an associative array. Especially, if you get it via some function.
Useful snippet for debugging javascript. It prints out key-value pairs of associative array. In PHP your have function print_r($array), but in Javascript you still have to make your own function.
If you want to apply the same action for multiple selectors in jQuery, you should write down their identificators separated by comma. It can be as simple ID of elements, their classes or something more difficult.
There's a common constraint in votes or surveys like "choose no more than 3 items". And it's not a good idead to allow user control the checked items quantity. You can easily set constraint to a quantity of checked checkbox items with JavaScript and jQuery. You can just disable unchecked checkbox items if user checked maximum quantity and enables items again in case of unchecking.
Strange behavior of console.log() I have noticed when I created a JS code for SharePoint page. My code used jQuery and SPServices library. The code used to get items from a list and render options for "select" control.
Below I post a part of my function which fills a JS array and renders options for "select" control.
