Javascript Array Map Browser Support

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JavaScript Array map() Method

    https://www.w3schools.com/jsref/jsref_map.asp
    The map() method creates a new array with the results of calling a function for every array element. The map() method calls the provided function once for each element in an array, in order. Note: map() does not execute the function for array elements without values. Note: this method does not change the original array.

Array.from() - JavaScript MDN

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from
    Array.from() has an optional parameter mapFn, which allows you to execute a map function on each element of the array (or subclass object) that is being created. More clearly, Array.from(obj, mapFn, thisArg) has the same result as Array.from(obj).map(mapFn, thisArg), except that it does not create an32%

Simplify your JavaScript – Use .map(), .reduce(), and ...

    https://medium.com/poka-techblog/simplify-your-javascript-use-map-reduce-and-filter-bd02c593cc2d
    Jan 29, 2018 · If you’re starting in JavaScript, maybe you haven’t heard of .map(), .reduce(), and .filter().For me, it took a while as I had to support Internet Explorer 8 until a couple years ago.Author: Etienne Talbot

Map - JavaScript MDN

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map
    The Map object holds key-value pairs and remembers the original insertion order of the keys. Any value (both objects and primitive values) may be used as either a key or a value.. Description. A Map object iterates its elements in insertion order — a for...of loop returns an array of [key, value] for each iteration.. Key equality. Key equality is based on the sameValueZero algorithm.

Arrow function expressions - JavaScript MDN

    https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions
    An arrow function expression is a syntactically compact alternative to a regular function expression, although without its own bindings to the this, arguments, super, or new.target keywords. Arrow function expressions are ill suited as methods, and they cannot be used as constructors.52%

javascript - Rendering an array.map() in React - Stack ...

    https://stackoverflow.com/questions/38282997/rendering-an-array-map-in-react
    Add up to Dmitry's answer, if you don't want to handle unique key IDs manually, you can use React.Children.toArray as proposed in the React documentation. React.Children.toArray. Returns the children opaque data structure as a flat array with keys assigned to each child.

Can I use... Support tables for HTML5, CSS3, etc

    https://caniuse.com/
    Nov 04, 2019 · "Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers. The site was built and is maintained by Alexis Deveria, with occasional updates provided by the web development community. The design used as of 2014 was largely created by Lennart Schoors. FAQ



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