RangeError: Invalid array length error fixed in javascript with examples

Dear friends,today we discuss about two types of errors which related to  each others 

1. RangeError: Invalid array length.
2. RangeError: Array size is not a small enough positive integer.

Those errors are thrown from V8,SpiderMoneky  and JavaScriptCore javascript engines from web browsers at front end and node js like javascript run time environment from back end 

So we will understand Invalid array length and Array size is not a small enough positive integer error and different cases of getting errors  related to javascript array length  in our coding.

1.declare an array   object by Array() constructor function giving negative number as array length 

let us check this with an example 

let arr = new Array(-10)

we will get the output as shown below

let arr = new Array(-10)

          ^

RangeError: Invalid array length

    at Object.<anonymous> (C:\Users\Administrator\Desktop\JS\arraylength.js:1:11)        

    at Module._compile (node:internal/modules/cjs/loader:1226:14)

    at Module._extensions..js (node:internal/modules/cjs/loader:1280:10)

    at Module.load (node:internal/modules/cjs/loader:1089:32)

    at Module._load (node:internal/modules/cjs/loader:930:12)

    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)

    at node:internal/main/run_main_module:23:47

Node.js v18.14.0

2.assign a floating point number to length property of the array 

let  me  explain it with an example. I declared an array and tried to change its length with floating point number

let arr = [];

arr.length = 1.5;

when we run the above code,we will get the result as shown below

arr.length = 1.5;

           ^

RangeError: Invalid array length

    at Object.<anonymous> (C:\Users\Administrator\Desktop\JS\arraylength.js:2:12)        

    at Module._compile (node:internal/modules/cjs/loader:1226:14)

    at Module._extensions..js (node:internal/modules/cjs/loader:1280:10)

    at Module.load (node:internal/modules/cjs/loader:1089:32)

    at Module._load (node:internal/modules/cjs/loader:930:12)

    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)

    at node:internal/main/run_main_module:23:47

Node.js v18.14.0

3.Assign length of the array with big value greater than 2^32-1  

we can check it with an example

let arr1 = new Array(10000000000000000000000000000000000000000000000000000000000000000000000000000000)

let arr2= new Array(Math.pow(2, 32))

if we execute both lines we will get the same error as shown below

let arr1 = new Array(10000000000000000000000000000000000000000000000000000000000000000000000000000000)

           ^

RangeError: Invalid array length

    at Object.<anonymous> (C:\Users\Administrator\Desktop\JS\arraylength.js:1:12)

    at Module._compile (node:internal/modules/cjs/loader:1226:14)

    at Module._extensions..js (node:internal/modules/cjs/loader:1280:10)

    at Module.load (node:internal/modules/cjs/loader:1089:32)

    at Module._load (node:internal/modules/cjs/loader:930:12)

    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)

    at node:internal/main/run_main_module:23:47

Node.js v18.14.0

finally we can avoid  errors related to array length like Invalid array length RangeError by not using floating point number,negative number and number greater that  2^32-1   as array length