Question 212817 in Javascript Question posted in
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How to get object key if their value matched with our variable in JavaScript?

I have a object as given below:

const obj = {
        "[email protected]": "email one",
        "[email protected]": "email two",
}

How to get object key if their value matched with given variable:

var outputVal = "email two"; 
    Object.entries(obj ).map(([key,value])=>{
          if(outputVal === value){
            console.log('output', key);
}
Tags:

3

Answers


  1. 0

    Working fine

    const obj = {
  "[email protected]": "email one",
  "[email protected]": "email two",
}

var outputVal = "email two";

Object.entries(obj).forEach(([key, value]) => {
  if (outputVal === value) {
    console.log('output', key);
  }
})

    You can use find on object

    const obj = {
  "[email protected]": "email one",
  "[email protected]": "email two",
};
var outputVal = "email two";
const key = Object.values(obj).find((key) => outputVal === key);
console.log(key);
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  2. 0

    Use find() on Object.keys(obj)

    const obj = {
        "[email protected]": "email one",
        "[email protected]": "email two",
}

const value = "email two";

const keyMatch = Object.keys(obj).find(k => obj[k] === value);
console.log(keyMatch);
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  3. 0

    Your problem can be simplified by swapping the keys/values around. Just interrogate the object key to get its value.

    const obj = {
  "email one": "[email protected]",
  "email two": "[email protected]"
}

const query = "email two";
console.log(obj[query]);
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