rambda/src/interpolate.js

Lightweight and faster alternative to Ramda with included TS definitions

const getOccurrences = input => input.match(/{{\s*.+?\s*}}/g)
const getOccurrenceProp = occurrence => occurrence.replace(/{{\s*|\s*}}/g, '')

const replace = ({ inputHolder, prop, replacer }) => {
  const regexBase = `{{${prop}}}`
  const regex = new RegExp(regexBase, 'g')
  return inputHolder.replace(regex, replacer)
}

export function interpolate(input) {
  return templateInput => {
    const occurrences = getOccurrences(input)
    if (occurrences === null) {
      return input
    }
    let inputHolder = input

    for (const occurrence of occurrences) {
      const prop = getOccurrenceProp(occurrence)
      inputHolder = replace({
        inputHolder,
        prop,
        replacer: templateInput[prop],
      })
    }

    return inputHolder
  }
}