node-lib

@wtasnorg/node-lib

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@wtasnorg/node-lib / indexString

Function: indexString()

indexString(s, substr): number

Defined in: src/strings.ts:481

Index returns the index of the first instance of substr in s, or -1 if substr is not present in s.

Parameters

s

string

Input string.

substr

string

Substring to find.

Returns

number

Index of first occurrence, or -1.

Example

index("chicken", "ken"); // 4
index("chicken", "dmr"); // -1
index("foo", "foobar");  // -1 — substr longer than s
index("", "");           // 0

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