Question

How to extract substring between single quotation marks in TypeScript

Answer 1

function extractSubstring(str: string): string {
    let startPos: number = str.indexOf("'");
      
    if (startPos !== -1) {
        let endPos: number = str.indexOf("'", startPos + 1);
        if (endPos !== -1) {
            return str.substring(startPos + 1, endPos);
        }
    }
      
    return "";
}
  
const str: string = "TypeScript is a free and 'open-source' high-level programming language";
  
const substr: string = "'" + extractSubstring(str) + "'";
console.log(substr);
  
  
  
/*
run:
  
'open-source'
  
*/

 

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