截取第n個某字符前的字符串

const splitString = (str, str1, index)=>{
	let arr = str.split(str1);
	let value = "";
	for(let i = 0; i < index; i++){
		value += arr[i] + str1
	}
	return value
}
let strings="store/url/url/home";
console.log(splitString(strings,"url",2));
//  store/url/url