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22 lines
739 B
JavaScript
22 lines
739 B
JavaScript
const rtlRange = '\u0591-\u07FF\uFB1D-\uFDFD\uFE70-\uFEFC'
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const ltrRange =
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'A-Za-z\u00C0-\u00D6\u00D8-\u00F6' +
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'\u00F8-\u02B8\u0300-\u0590\u0800-\u1FFF\u200E\u2C00-\uFB1C' +
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'\uFE00-\uFE6F\uFEFD-\uFFFF'
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/* eslint-disable no-misleading-character-class */
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const rtl = new RegExp('^[^' + ltrRange + ']*[' + rtlRange + ']')
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const ltr = new RegExp('^[^' + rtlRange + ']*[' + ltrRange + ']')
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/* eslint-enable no-misleading-character-class */
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/**
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* Detect the direction of text: left-to-right, right-to-left, or neutral
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*
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* @param {string} value
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* @returns {'rtl'|'ltr'|'neutral'}
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*/
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export function direction(value) {
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const source = String(value || '')
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return rtl.test(source) ? 'rtl' : ltr.test(source) ? 'ltr' : 'neutral'
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}
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