Function substringBetween

substringBetween<T extends string | null = null>(
    s: Nullish,
    start: string | RegExp,
    end: string | RegExp,
    on_missing?: T,
): T
Returns the substring between the first start and the first end after it.
Type Parameters
- T extends string | null = null
Parameters
- s: Nullish
  Input string, null, or undefined.
- start: string | RegExp
  String or regex marking where to start.
- end: string | RegExp
  String or regex marking where to end.
- Optionalon_missing: T
  Returned if s is nullish or delimiters not found (default: null).
Returns T
The substring between delimiters, or on_missing.
Remarks
Search for end begins after start. Occurrences of end before start are ignored. An end regex runs against the remaining substring, so ^ anchors immediately after start. Adjacent delimiters return an empty string rather than on_missing. Regex flags are preserved and caller lastIndex values are neither read nor changed. Each regex starts at zero in its searched substring; sticky regexes must match there.
Example
```
substringBetween("<a>b</a>", "<a>", "</a>");     // "b"
substringBetween("yabbadabbadoo", "abba", "doo"); // "dabba"
substringBetween("<a>b", "<a>", "</a>");         // null
```
- Defined in string/substring.ts:99
substringBetween<T extends string | null = null>(
    s: Nullable<string>,
    start: string | RegExp,
    end: string | RegExp,
    on_missing?: T,
): string | T
Returns the substring between the first start and the first end after it.
Type Parameters
- T extends string | null = null
Parameters
- s: Nullable<string>
  Input string, null, or undefined.
- start: string | RegExp
  String or regex marking where to start.
- end: string | RegExp
  String or regex marking where to end.
- Optionalon_missing: T
  Returned if s is nullish or delimiters not found (default: null).
Returns string | T
The substring between delimiters, or on_missing.
Remarks
Search for end begins after start. Occurrences of end before start are ignored. An end regex runs against the remaining substring, so ^ anchors immediately after start. Adjacent delimiters return an empty string rather than on_missing. Regex flags are preserved and caller lastIndex values are neither read nor changed. Each regex starts at zero in its searched substring; sticky regexes must match there.
Example
```
substringBetween("<a>b</a>", "<a>", "</a>");     // "b"
substringBetween("yabbadabbadoo", "abba", "doo"); // "dabba"
substringBetween("<a>b", "<a>", "</a>");         // null
```
- Defined in string/substring.ts:100

Function substringBetween

Type Parameters

Parameters

Returns T

Remarks

Example

Type Parameters

Parameters

Returns string | T

Remarks

Example

Settings