如何访问对象键中有空格的 JavaScript 对象？

Question

I have a JavaScript object that looks something like this:

var myTextOptions = {
  'cartoon': {
     comic: 'Calvin & Hobbes',
     published: '1993'
  },
  'character names': {
    kid: 'Calvin',
    tiger: 'Hobbes'
  }
}

I can access the properties of cartoon easily using myTextOptions.cartoon.comic or whatever. However, I haven't been able to get the syntax right for accessing kid . I've tried the following with no luck:

myTextOptions.character names.kid
myTextOptions."character names".kid
myTextOptions.character\ names.kid
myTextOptions.'character names'.kid
myTextOptions.["character names"].kid
myTextOptions.character%20names.kid

Answer 1

Use ECMAscripts "bracket notation":

myTextOptions[ 'character names' ].kid;

You can use that notation either way, reading & writting.

For more information read out here:

• https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects

Answer 2

Properties of JavaScript objects can also be accessed or set using a bracket notation (for more details see property accessors ). Objects are sometimes called associative arrays since each property is associated with a string value that can be used to access it. So, for example, you could access the properties of the myCar object as follows:

myCar['make'] = 'Ford';
myCar['model'] = 'Mustang';
myCar['year'] = 1969;

For more, read on at Working with JS Objects .

So in your case it's myTextOptions['character names'].kid;

Answer 3

We can also do this by -

myTextOptions[ 'character names' ]['kid'] ;

This is useful when we have consecutive keys which consist of space.

Answer 4

In Google Chrome, if you go to inspect element and then hover over the json file data sets, each individual data set will have a tooltip appear showing it's path and it also gives you the option to copy the path into your clipboard. Just an FYI.

Answer 5

Let me share my solution here I am using VueJs with type script.

I got following json to parse and display in UI

 {
    "Brand": "MAMA",
    "Variety": "Instant Noodles Coconut Milk Flavour",
    "Style": "Pack",
    "Country": "Myanmar",
    "Stars": 5,
    "Top Ten": "2016 #10"
  },

I have created the following model interfere in Typescript

export interface Resto {
    Brand: string;
    Variety: string;
    Style: string;
    Country: string;
    Stars: any;
    Top_Ten: string;
    }

I have called the API as:

   public async getListOfRestos() {
    return (await fetch(
      `http://starlord.hackerearth.com/TopRamen`,
      {
        method: "get",
        credentials: "include",
        headers: {
          "Content-Type": "application/json",
        },
        body: undefined
      }
    )) as IFetchResponse<Resto[]>;
  } 

Used in JSX like:

 <div class="parent" v-for="(x,i) in listOfRestos" :key="i">
      <div>{{x.Brand}}</div>
      <div>{{x.Variety}}</div>
      <div>{{x.Style}}</div>
      <div>{{x.Country}}</div>
      <div>{{x.Stars}}</div>
      <div>{{x['Top Ten']}}</div>
  </div>

Same can also work in React and Angular.

Answer 6

I have a JavaScript object that looks something like this:

var myTextOptions = {
  'cartoon': {
     comic: 'Calvin & Hobbes',
     published: '1993'
  },
  'character names': {
    kid: 'Calvin',
    tiger: 'Hobbes'
  }
}

I can access the properties of cartoon easily using myTextOptions.cartoon.comic or whatever. However, I haven't been able to get the syntax right for accessing kid . I've tried the following with no luck:

myTextOptions.character names.kid
myTextOptions."character names".kid
myTextOptions.character\ names.kid
myTextOptions.'character names'.kid
myTextOptions.["character names"].kid
myTextOptions.character%20names.kid