regex-input-string

regex-input-string

Augment a user-input string into a regular expression.

Usage

new RegexInputString(input: String, flags: String = ''): RegExp

Simple strings

let r1 = new RegexInputString('either an? (escaped) string');
// r1 === /either an\? \(escaped\) string/

Regex strings

let r2 = new RegexInputString('/^or an (improved|augmented) regexp? string/ig');
// r2 === /^or an (improved|augmented) regexp? string/ig

Filtering

Useful for filtering items based on a text input (where advanced users can perform regex searches), e.g.

<input value="/^regexp? query$/ig" />

inputEl.addEventListener('input', e => {
    let filter   = new RegexInputString(e.target.value, 'i')),
        filtered = items.filter(item => filter.test(item.name));
});