Using index signatures with methods - Typescript 3.5

Question

interface Keys {
  [key: string]: any
}

const obj: Keys = {
  trimDescription(text: string, length: number): string {
    return text.length > length ? text.substrin         


        

Answer 1

interface Keys {
    [key: string]: (text: string, length: number) => string;
}

const obj: Keys = {
    trimDescription(text: string, length: number): string {
        return text.length > length ? text.substring(0, length - 3) + '...' : text
    }
}

Object.keys(obj).forEach(key => {
    console.log(obj[key])
})