This isn’t specific to :not(…) and :has(…) selectors- actually, all pseudos in Sizzle allow for quoted arguments. The pattern for pseudos’ arguments is defined as: pseudos = “:(” + characterEncoding + “)(?:\\((?:([‘\”])((?:\\\\.|[^\\\\])*?)\\2|([^()[\\]]*|(?:(?:” + attributes + “)|[^:]|\\\\.)*|.*))\\)|)” Which can be found on line 91 of sizzle.js as of 831c9c48… Let’s add some indentation to that, to … Read more
The simple technique used to asynchronously load the AdSense script proposed by other answers won’t work because Google uses document.write() inside of the AdSense script. document.write() only works during page creation, and by the time the asynchronously loaded script executes, page creation will have already completed. To make this work, you’ll need to overwrite document.write() … Read more
I’ll try to answer these as concisely as possible: Cache it when it’s used often, especially in a loop situation, running the same code to get the same result is never a good thing for performance, cache it. Use this when you only need a DOM element and $(this) when you need the jQuery methods … Read more
That is correct – Sizzle (jQuery’s selector engine) behaves the same way as CSS selectors. CSS and Sizzle selectors are evaluated right-to-left, and so #foo a will find all a nodes, then filter those by nodes that descend from #foo. You improve this by ensuring that your leaf selectors have a high specificity, usually by … Read more
The DOM usually returns a NodeList for most operations like getElementsByTagName. Although a NodeList almost feels like an array, it is not. It has a length property like an array does, and a method item(index) to access an object at the given index (also accessible with the [index] notation), but that’s where the similarity ends. … Read more
To get all the elements starting with “jander” you should use: $(“[id^=jander]”) To get those that end with “jander” $(“[id$=jander]”) See also the JQuery documentation