every(): This method checks a condition with every element of an array and if every element satisfies then returns true if at least one element doesn’t satisfy the condition then returns false.reduceRight(): It is quite same to reduce method, except for the traversal that happens from right to left.NOTE: This example is the same as iterating over every element to calculate the sum. reduce(): It applies a function to each element in an array and reduces the array to a single element.filter(): It creates a new array that contains elements which got filtered by making array elements pass some condition.map(): The map() method creates a new array by mapping every element of the array (on which the map is used).forEach(): It executes the function for every element found in the array.isArray(): This method checks if the object is an array or not and returns the result in true or false.But when the es5 ‘use strict’ feature is used, an error is reported. The earlier versions of JS allow the usage of undeclared variables. Here is a list of features that have come with the es5 version.
After a decade, ES5 was eventually released with several additions ES5ĮS5 was released in 2009, ten years after the release of its previous version. To date, ES has published nine versions, and the latest one (9th version) was published in the year 2018.ĮCMA Script's first three versions- ES1, ES2, and ES3 were yearly updates, whereas ES4 was never released due to political disagreements. And Javascript is the most well-known implementation of ES, while ActionScript (from Macromedia/Adobe Systems) and JScript (from Microsoft) are other implementations of ES. What is ES? In the year 1996, a standards organization called ECMA (European Computer Manufacturers Association) International carved out standard specifications called ECMAScript (ES), which all browser vendors could implement. Javascript has come a long way ie from client-side programming/frameworks (like Angular/React) to a server-side technology like NodeJS in 2009.
Finally, when Netscape Navigator 2.0 Beta 3 was released, it was given the name Javascript. Javascript at its development phase was called Mocha and was first shipped with Netscape Navigator 2.0 as LiveScript. Javascript was introduced by Brendan Eich, a Netscape employee. The interaction is possible due to the programs or scripts written along with HTML. Javascript is a scripting language introduced to make web pages alive and interactive with the user.
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