startsWith

Checks if a string starts with a given prefix. Returns a boolean.

Syntax

startsWith(input, prefix)

or chained:

<string>.startsWith(prefix)

Arguments

• input (string, optional when chained) - The string to check.

• prefix (string) - The prefix to look for.

Examples

Basic checks

startsWith("hello world", "hello")
// true

"foobar".startsWith("bar")
// false

CLI usage

$ echo '{"url": "https://example.com"}' | dasel -i json 'url.startsWith("https")'
true

Use inside a filter

["https://a.com", "http://b.com", "https://c.com"].filter(startsWith($this, "https"))
// ["https://a.com", "https://c.com"]