Sat Nov 13 2021·2 min read
Photo by Avi Richards
Updated - Sat Nov 13 2021
String.split() method with array destructuring to capture the first part
and the remainder of the string in separate variables, e.g.
const [first, ...rest] = str.split('-').
const str = 'try-again-later'; const [first, ...rest] = str.split('-'); console.log(first); // 👉️ try console.log(rest); // 👉️ ['again', 'later'] const remainder = rest.join('-'); console.log(remainder); // 👉️ again-later
In the code snippet, we've used the
method to split the string on a dash (
array destructuring assignment
to assign the first element of the array to the
rest variable, we use both array destructuring and the rest operator
to gather all of the remaining elements of the array into the
At this point the
rest variable is an array containing 2 elements -
Finally we use the
method to join the contents of the
rest array on a
dash and get the
remainder of the string -
slice() method on the string, passing it the index of the character +
as a parameter. The
slice method will return the portion of the string after
the first occurrence of the character.
// ✅ Supported in IE const str = 'try-again-later'; const after = str.slice(str.indexOf('-') + 1); console.log(after); // 👉️ again-later const before = str.slice(0, str.indexOf('-')); console.log(before); // 👉️ try
The first example shows how to get the part after the last occurrence of a character.
The parameter we passed to the String.slice method is the start index - the index of the first character to be included in the new string.
1to its index to start immediately after.
The second example shows how to get the part before the first occurrence of the character.
The second parameter we passed to the
slice() method is the end index - go
up to, but not including this index.
In this scenario, we start at index
0 and go up to, but not including the
index of the first occurrence of the supplied character.