{"id":7254,"date":"2022-05-19T12:34:29","date_gmt":"2022-05-19T07:04:29","guid":{"rendered":"https:\/\/www.innovationm.com\/blog\/?p=7254"},"modified":"2022-05-19T12:34:29","modified_gmt":"2022-05-19T07:04:29","slug":"destructuring-in-javascript","status":"publish","type":"post","link":"https:\/\/www.innovationm.com\/blog\/destructuring-in-javascript\/","title":{"rendered":"Destructuring in JavaScript"},"content":{"rendered":"

The Destructuring introduced new features of ES6.JavaScript provides a
\nmechanism to handle the array and properties of objects in a much more innovative
\nway. this mechanism is called destructuring. destructuring means implies a
\ncomplex structure into the simpler parts.
\nDestructuring allows us to extract multiple properties from an object or an Array. It is
\na special syntax that allows us to unpack an Array or object into a bunch of variables.
\nDestructuring makes your code more readable, easily maintainable
\n, and manageable. It saves the most valuable thing \u2013 Time.<\/p>\n

Before ES6: –<\/strong><\/p>\n

const Biodata= {\r\nname:\u201dAjay\u201d,\r\ncontact:8929939922,\r\nlocation:\u201dAgra\u201d\r\n}\r\nlet name= Biodata.name;\r\nlet contact = Biodata. contact;\r\nlet location = Biodata. location;\r\nconsole.log(name); \/\/ =&gt; Ajay\r\nconsole.log(contact); \/\/ =&gt; 8929939922\r\nconsole.log(location); \/\/ =&gt; Agra<\/pre>\n
 <\/p>\n
Now IN ES6: –<\/strong><\/p>\n
const biodata={\r\nname:\u201dajay\u201d,\r\ncontact:7839738292,\r\n\r\nlocation:\u201dAgra Up\u201d,\r\n}\r\nconst {name, contact, location} = biodata; \/\/ destructuring assignment\r\nconsole.log(name); \/\/ =&gt; Ajay\r\nconsole.log(contact); \/\/ =&gt; 7839738292\r\nconsole.log(location); \/\/ =&gt; Agra Up<\/pre>\n
 <\/p>\n
Array Destructuring: –<\/strong><\/p>\n
Array Destructuring means if you want to extract data from an array, it\u2019s quite simple
\nusing the destructuring assignment. Array destructuring extracts values from an array.<\/p>\n
Example: –<\/strong><\/p>\n
const language = [\u201cJavaScript\u201d,\u201dReact Js\u201d,\u201dNode Js\u201d,\u201dJava\u201d];\r\nconst [lang1, lang2, lang3, lang4] = language;\r\nconsole.log(lang1); \/\/ =&gt; JavaScript\r\nconsole.log(lang2); \/\/ =&gt; React Js\r\nconsole.log(lang3); \/\/ =&gt; Node Js\r\nconsole.log(lang4); \/\/ =&gt; Java<\/pre>\n
 <\/p>\n
Spread operator with Array Destructuring: –<\/strong><\/p>\n
Spread means spreading or expending. Spread operator syntax is three (\u2026) dots.
\nThe spread operator has spread out all the elements of an array or object.<\/p>\n
Example: –<\/strong><\/p>\n
const arr = [\u201cA\u201d, \u201cB\u201d, \u201cC\u201d,\u201dD\u201d, \u201cE\u201d];\r\nconst [one,two,...remain] =arr;\r\nconsole.log(one); \/\/ A\r\nconsole.log(two); \/\/B\r\nconsole.log(remain); \/\/ [\u201cC\u201d,\u201dD\u201d,\u201dE\u201d]<\/pre>\n
 <\/p>\n
This is useful for getting a new array with only some elements removed. We can
\nalso, use the spread operator to combine multiple arrays together and copy of the
\narray.<\/p>\n
Object Destructuring: –<\/strong><\/p>\n
Object Destructuring is a useful JavaScript feature to extract properties from
\nobjects. Object destructuring can extract multiple properties in one statement and
\nalso can access properties from nested objects.<\/p>\n
Example: –<\/strong><\/p>\n
const note = { \/\/ object we want to destructure\r\nid:1,\r\nname:\u2019abc\u2019\r\ncourse:\u2019xyz\u2019,\r\nlocation:\u2019agra\u2019,\r\n}\r\nconst {id,name,course,location} = note; \/\/destructure object into our variable\r\nconsole.log(id) \/\/ 1\r\nconsole.log(name) \/\/abc\r\nconsole.log(course) \/\/ xyz\r\nconsole.log(location) \/\/ agra<\/pre>\n
 <\/p>\n
Note: –<\/strong> const {id,name,course,location} = note is an object destructuring . This
\nstatement defines the variable id, name, course and location.<\/p>\n
Mixed Destructuring: –<\/strong><\/p>\n
There are cases when you are working with a pretty complex object and Array
\nstructure.<\/p>\n
Example: –<\/strong><\/p>\n
const person = {\r\nname:\u201dneeraj\u201d,\r\n\r\nage:25,\r\nlocation: {\r\ncountry:\u201dindia\u201d,\r\ncity:\u201ddelhi\u201d,\r\ndistance: [100,200]\r\n}\r\n}\r\nconst {name,location:{country,city,distance:[one,two]}} =person;\r\nconsole.log(`I am ${name} from ${city},${country}. Distance(${one} to\r\n${two})`)<\/pre>\n
 <\/p>\n
Output: –<\/strong><\/p>\n
I am Neeraj from Delhi, India. Distance(100 to 200)<\/p>\n
Summary: –<\/strong><\/p>\n
Now you have learned how to work destructing in an array and objects.
\nIt helps create variables by extracting the Array and object\u2019s properties in a
\nmuch simpler way. If you are working on a framework\/library like ReactJs, Angular, or Vue, you will be using a lot of Array and object destructing.<\/p>\n","protected":false},"excerpt":{"rendered":"
The Destructuring introduced new features of ES6.JavaScript provides a mechanism to handle the array and properties of objects in a much more innovative way. this mechanism is called destructuring. destructuring means implies a complex structure into the simpler parts. Destructuring allows us to extract multiple properties from an object or an Array. It is a […]<\/p>\n","protected":false},"author":1,"featured_media":7255,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[256,360],"tags":[722,723,778,224,346],"class_list":["post-7254","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java-application","category-javascript","tag-blog","tag-blogging","tag-destructuring","tag-java","tag-javascript"],"yoast_head":"\nDestructuring in JavaScript - InnovationM - Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.innovationm.com\/blog\/destructuring-in-javascript\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Destructuring in JavaScript - InnovationM - Blog\" \/>\n<meta property=\"og:description\" content=\"The Destructuring introduced new features of ES6.JavaScript provides a mechanism to handle the array and properties of objects in a much more innovative way. this mechanism is called destructuring. destructuring means implies a complex structure into the simpler parts. 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