nice overview though some of the code examples are wrong... E.g. Why is macOS often referred to as 'Darwin'? Could you explain the purpose of creating your jQuery-like library? We strive for transparency and don't collect excess data. The NodeList object represents a collection of nodes. jQuery imposes a methodology which needs to be learned and may compete with other aspects of your code. With jQuery already so popular, they should have made document.querySelector() behave just like $(). This was surprising as I was under the impression that if there was a browser native method available, jQuery used that. So now, DOM elements selectors is not the strongest point of jQuery anymore. The API for $ and $$ is more jQuery-ish, and if you'd like to reproduce it its like: To avoid needing polyfills for forEach or Symbol.iterator on NodeList collections, you can also go ahead and convert the static collection as Array so that all methods, including filter and map can be used. Using getElement* on a static element fetched with querySelector* will result in an element that is live with respect to the static subset of the DOM copied by querySelector, but not live with respect to the full document DOM... this is where the simple live/static interpretation of elements begins to fall apart. To sum up, I see the main benefits of jQuery as being concise code, and ubiquity. One of the main ones is that they are well documented, and have communities such as ... say ... stackexchange, where help with the libraries can be found. querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript, jsperf.com/getelementsbyclassname-vs-queryselectorall/25, https://jsperf.com/getelementsbyclassname-vs-queryselectorall/18, css-tricks.com/almanac/selectors/f/first-child, getelementsbyclassname vs querySelectorAll vs jquery select, Nvidia has acquired Arm. Returns a NodeList containing all matching Element nodes within the node's subtree, or an empty NodeList if no matches are found. @Christoph Since this is easy, I added compatiblity for IE8 and above. how can you document long lines of code with a lot of non related things happening ? You may have written parts yourself, or chosen a modular library like. As a rule, I caution against using jQuery for new projects: If none of the above matters, then do what you will. Inshort if we want to select single element go for queryslector or if we want multiple element go for getElement. Here's some cherry-pickings from the source that show the kind of things jQuery(w/ Sizzle) sorts out for you: If that guard fails it uses it's a version of Sizzle that isn't enhanced with querySelectorAll. But its querying part is a very big part of the strength of jQuery! CDN provided by MaxCDN.
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