How to convert camelcase to snake case in Javascript?

user_2394618 0
Viewed 68087

I want to convert a string of that is in camel case to snake case using TypeScript.

Remember that the "snake case" refers to the format style in which each space is replaced by an underscore (_) character and the first letter of each word written in lowercase.

Example: fieldName to field_name should be a valid conversion, but FieldName to Field_Name is not valid.

json javascript
3 Answers
const camelToSnakeCase = str => str.replace(/[A-Z]/g, letter => `_${letter.toLowerCase()}`);
Admin1

You could do something like this:

function camelToUnderscore(key) {
   var result = key.replace( /([A-Z])/g, " $1" );
   return result.split(' ').join('_').toLowerCase();
}

console.log(camelToUnderscore('itemName'));
user_49825400

Try this:

function toSnakeCase(inputString) {
    return inputString.split('').map((character) => {
        if (character == character.toUpperCase()) {
            return '_' + character.toLowerCase();
        } else {
            return character;
        }
    })
    .join('');
}
// x = item_name
user_60493240
Related