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parse

ts

type parseOptions = {
    readonly prefix: string;
} | {
    readonly suffix: string;
} | {
    readonly prefix: string;
    readonly suffix: string;
}

function parse(num: string, options: parseOptions): number | undefined

Try to parse a number by the given prefix and suffix. If the prefix or suffix doesn't match the passed value, returns undefined.

Example

ts

num.parse(
    'I see penguins',
    { prefix: 'I see ', suffix: 'penguins' }
) // undefined
num.parse('US$4', { prefix: 'R$' }) // undefined
num.parse('4px', { suffix: 'rem' }) // undefined

ts

num.parse('$100.00', { prefix: '$' }) // 100.00
num.parse(
    'width: 100px',
    { prefix: 'width: ', suffix: 'px' }
) // 100