strings wordWrap.ts

92.85% Statements 13/14

62.5% Branches 5/8

100% Functions 3/3

100% Lines 12/12

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  export interface WrapOptions {
  width?: number;
}
 
const lineMap = (line: string) =>
  line.slice(-1) === '\n' ? line.slice(0, line.length - 1).replace(/[ \t]*$/gm, '') : line;
const lineReduce = (acc: string[], line: string) => {
  acc.push(...line.split('\n'));
  return acc;
};
 
export const wordWrap = (str: string, options: WrapOptions = {}): string[] => {
  Iif (!str) return [];
 
  const width = options.width || 50;
  const regexString = '.{1,' + width + '}([\\s\u200B]+|$)|[^\\s\u200B]+?([\\s\u200B]+|$)';
  const re = new RegExp(regexString, 'g');
  const lines = (str.match(re) || []).map(lineMap).reduce(lineReduce, [] as string[]);
 
  return lines;
};