CMS that are outdated on them self like WordPress, and JQuery is not really comparable to React or Angular, JQuery was created because the old version of Javascript was lagging a lot of things for web developement and Browsers had different version of Javascript. JQuery was created to get around all that issues to use Javascript in the early days. However this days Javascript support is much better and you can do everything and more you can do with jQuery with just javascript!
I think CMS is still very popular...like WordPress Magento. But I am not sure what you "Browsers had different version of Javascript", I have not seen any different versions for vanilla javascript for different browser. All I know is javascript is actually parsed from the browser it self, it's not dependable on any other js libraries like jQuery. Yes some methods are not supported by the IE browser like IE8, IE9, IE10, (we have also fix for that), because those methods are not in build functionality from IE browser. From IE Edge I think javascript support is seemless But Chrome, Mozilla, Opera safari behave alike.
A technical committee at EMCA known as TC39 is the organization behind the standardization of the ECMAScript (JavaScript) specification. They released new specs of ECMAScript 'vanilla javascript' almost every year and its up to the browser devs to add those. Today most modern browsers are using webkit apart of Safari from Apple.
Not totally outdated, still use with various CMS. But yes React and Angular are now gaining more popularity.
CMS that are outdated on them self like WordPress, and JQuery is not really comparable to React or Angular, JQuery was created because the old version of Javascript was lagging a lot of things for web developement and Browsers had different version of Javascript. JQuery was created to get around all that issues to use Javascript in the early days. However this days Javascript support is much better and you can do everything and more you can do with jQuery with just javascript!
I think CMS is still very popular...like WordPress Magento. But I am not sure what you "Browsers had different version of Javascript", I have not seen any different versions for vanilla javascript for different browser. All I know is javascript is actually parsed from the browser it self, it's not dependable on any other js libraries like jQuery. Yes some methods are not supported by the IE browser like IE8, IE9, IE10, (we have also fix for that), because those methods are not in build functionality from IE browser. From IE Edge I think javascript support is seemless But Chrome, Mozilla, Opera safari behave alike.
A technical committee at EMCA known as TC39 is the organization behind the standardization of the ECMAScript (JavaScript) specification. They released new specs of ECMAScript 'vanilla javascript' almost every year and its up to the browser devs to add those. Today most modern browsers are using webkit apart of Safari from Apple.
Thanks for the info and sharing the knowledge.