jquery.one.js

jQuery helpers to help verify that your selectors are returning the expected number of elements. Usage is simple.

$( selector ).onlyOne()

If there is one and only one element matching the selector, then all is well! Otherwise, an error will be thrown. There is a corresponding helper to ensure at least one element found, cleverly named:

$( selector ).atLeastOne()

There are alternate spellings to suit your style:

$.one(selector)           // Shortcut for $(selector).onlyOne()
$.many(selector)          // Shortcut for $(selector).atLeastOne()

var collection = $(selector)
collection.findMany(selector)   // Same as collection.find(selector).notEmpty()
collection.findOne(selector)    // Same as collection.find(selector).onlyOne()