CODEWITHSUNDEEP
angulartypescript
Alessandro Celeghin
Alessandro Celeghin

Reputation: 4189

Angular 4 params with json stringify

I have to stringify some parameter to put it in a http patch request my method is something like this

let param = JSON.stringify({
code : this.code,
name : this.name,
fieldName: this.data
});

In that case I have a param like this:

code:3,name:'asdf',fieldName: 'col'

But I want the value of fieldName ond not the word fieldName... Is there a method to expand or evaluate this parameter name?

Upvotes: 2

Views: 5139

Answers (1)

dfsq
dfsq

Reputation: 193261

If you want value of code variable to be used as a key name, then you need to use computed object property notation:

let param = JSON.stringify({
  [code]: this.code,
  [name]: this.name,
  [fieldName]: this.data
});

In the old days we would have to create object separately and assign variable keys in separate step using bracket notation:

let params = {}
params[code] = this.code
params[name] = this.name
params[fieldName] = this.data

let param = JSON.strigify(params)

Upvotes: 5

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