javascript - what does it mean "Legacy octal literals are not allowed in strict mode" in ReactJS? - Stack Over

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I am trying to loops through these array's but am getting this error "Legacy octal literals are not allowed in strict mode"

const myList =[
    {
        id: 01,
        title: 'FrontEnd Engineer',
        name : 'Sheshathri',
        describtion: "simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book"
    },
    {
        id: 02,
        title: 'QA Engineer',
        name : 'Jobin',
        describtion: "It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum."
    }
  ]
  
  export default myList;

I am trying to loops through these array's but am getting this error "Legacy octal literals are not allowed in strict mode"

const myList =[
    {
        id: 01,
        title: 'FrontEnd Engineer',
        name : 'Sheshathri',
        describtion: "simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book"
    },
    {
        id: 02,
        title: 'QA Engineer',
        name : 'Jobin',
        describtion: "It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum."
    }
  ]
  
  export default myList;

In App.js

import myList from './ContentList';

const listItem = myList.map(list => <Content key= {list.id} title = {list.title} name = {list.name} describtion = {list.describtion} />);

• javascript
• arrays
• reactjs
• object
• react-props

Share Improve this question Follow edited Jul 31, 2021 at 16:53 Giorgi Moniava 28.7k99 gold badges5757 silver badges9898 bronze badges asked Jul 31, 2021 at 16:45 Ramkumar KSRamkumar KS 3511 silver badge66 bronze badges 1

• strict mode by default throws error for legacy methods/code, you should avoid legacy code – Amruth Commented Jul 31, 2021 at 16:47

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1 Answer 1

Sorted by: Reset to default 8

I am trying to loops through these array's but am getting this error "Legacy octal literals are not allowed in strict mode"

It refers to yours ids:

id: 01,
title: 'FrontEnd Engineer',

Replace with

id: 1,
title: 'FrontEnd Engineer',

Octal literals are numerals that begin with a leading zero, such as:

var num = 071; // 57

The leading zero to identify an octal literal has been a source of confusion and error in JavaScript. ECMAScript 5 deprecates the use of octal numeric literals in JavaScript and octal literals cause syntax errors in strict mode.

Octal system

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